Merge github.com:grpc/grpc into connected-subchannel

168 files changed, 4372 insertions, 929 deletions

diff --git a/Makefile b/Makefile
index d2c2eed416..37e9f5ee59 100644
--- a/Makefile
+++ b/Makefile
@@ -829,6 +829,8 @@ hpack_table_test: $(BINDIR)/$(CONFIG)/hpack_table_test
 httpcli_format_request_test: $(BINDIR)/$(CONFIG)/httpcli_format_request_test
 httpcli_parser_test: $(BINDIR)/$(CONFIG)/httpcli_parser_test
 httpcli_test: $(BINDIR)/$(CONFIG)/httpcli_test
+init_test: $(BINDIR)/$(CONFIG)/init_test
+invalid_call_argument_test: $(BINDIR)/$(CONFIG)/invalid_call_argument_test
 json_rewrite: $(BINDIR)/$(CONFIG)/json_rewrite
 json_rewrite_test: $(BINDIR)/$(CONFIG)/json_rewrite_test
 json_test: $(BINDIR)/$(CONFIG)/json_test
@@ -836,7 +838,6 @@ lame_client_test: $(BINDIR)/$(CONFIG)/lame_client_test
 lb_policies_test: $(BINDIR)/$(CONFIG)/lb_policies_test
 low_level_ping_pong_benchmark: $(BINDIR)/$(CONFIG)/low_level_ping_pong_benchmark
 message_compress_test: $(BINDIR)/$(CONFIG)/message_compress_test
-multi_init_test: $(BINDIR)/$(CONFIG)/multi_init_test
 multiple_server_queues_test: $(BINDIR)/$(CONFIG)/multiple_server_queues_test
 murmur_hash_test: $(BINDIR)/$(CONFIG)/murmur_hash_test
 no_server_test: $(BINDIR)/$(CONFIG)/no_server_test
@@ -1866,7 +1867,7 @@ endif
 
 buildtests: buildtests_c buildtests_cxx buildtests_zookeeper
 
-buildtests_c: privatelibs_c $(BINDIR)/$(CONFIG)/alpn_test $(BINDIR)/$(CONFIG)/bin_encoder_test $(BINDIR)/$(CONFIG)/chttp2_hpack_encoder_test $(BINDIR)/$(CONFIG)/chttp2_status_conversion_test $(BINDIR)/$(CONFIG)/chttp2_stream_map_test $(BINDIR)/$(CONFIG)/compression_test $(BINDIR)/$(CONFIG)/dualstack_socket_test $(BINDIR)/$(CONFIG)/endpoint_pair_test $(BINDIR)/$(CONFIG)/fd_conservation_posix_test $(BINDIR)/$(CONFIG)/fd_posix_test $(BINDIR)/$(CONFIG)/fling_client $(BINDIR)/$(CONFIG)/fling_server $(BINDIR)/$(CONFIG)/fling_stream_test $(BINDIR)/$(CONFIG)/fling_test $(BINDIR)/$(CONFIG)/gpr_avl_test $(BINDIR)/$(CONFIG)/gpr_cmdline_test $(BINDIR)/$(CONFIG)/gpr_cpu_test $(BINDIR)/$(CONFIG)/gpr_env_test $(BINDIR)/$(CONFIG)/gpr_file_test $(BINDIR)/$(CONFIG)/gpr_histogram_test $(BINDIR)/$(CONFIG)/gpr_host_port_test $(BINDIR)/$(CONFIG)/gpr_log_test $(BINDIR)/$(CONFIG)/gpr_slice_buffer_test $(BINDIR)/$(CONFIG)/gpr_slice_test $(BINDIR)/$(CONFIG)/gpr_stack_lockfree_test $(BINDIR)/$(CONFIG)/gpr_string_test $(BINDIR)/$(CONFIG)/gpr_sync_test $(BINDIR)/$(CONFIG)/gpr_thd_test $(BINDIR)/$(CONFIG)/gpr_time_test $(BINDIR)/$(CONFIG)/gpr_tls_test $(BINDIR)/$(CONFIG)/gpr_useful_test $(BINDIR)/$(CONFIG)/grpc_auth_context_test $(BINDIR)/$(CONFIG)/grpc_base64_test $(BINDIR)/$(CONFIG)/grpc_byte_buffer_reader_test $(BINDIR)/$(CONFIG)/grpc_channel_args_test $(BINDIR)/$(CONFIG)/grpc_channel_stack_test $(BINDIR)/$(CONFIG)/grpc_completion_queue_test $(BINDIR)/$(CONFIG)/grpc_credentials_test $(BINDIR)/$(CONFIG)/grpc_json_token_test $(BINDIR)/$(CONFIG)/grpc_jwt_verifier_test $(BINDIR)/$(CONFIG)/grpc_security_connector_test $(BINDIR)/$(CONFIG)/hpack_parser_test $(BINDIR)/$(CONFIG)/hpack_table_test $(BINDIR)/$(CONFIG)/httpcli_format_request_test $(BINDIR)/$(CONFIG)/httpcli_parser_test $(BINDIR)/$(CONFIG)/httpcli_test $(BINDIR)/$(CONFIG)/json_rewrite $(BINDIR)/$(CONFIG)/json_rewrite_test $(BINDIR)/$(CONFIG)/json_test $(BINDIR)/$(CONFIG)/lame_client_test $(BINDIR)/$(CONFIG)/lb_policies_test $(BINDIR)/$(CONFIG)/message_compress_test $(BINDIR)/$(CONFIG)/multi_init_test $(BINDIR)/$(CONFIG)/multiple_server_queues_test $(BINDIR)/$(CONFIG)/murmur_hash_test $(BINDIR)/$(CONFIG)/no_server_test $(BINDIR)/$(CONFIG)/resolve_address_test $(BINDIR)/$(CONFIG)/secure_endpoint_test $(BINDIR)/$(CONFIG)/set_initial_connect_string_test $(BINDIR)/$(CONFIG)/sockaddr_utils_test $(BINDIR)/$(CONFIG)/tcp_client_posix_test $(BINDIR)/$(CONFIG)/tcp_posix_test $(BINDIR)/$(CONFIG)/tcp_server_posix_test $(BINDIR)/$(CONFIG)/time_averaged_stats_test $(BINDIR)/$(CONFIG)/timeout_encoding_test $(BINDIR)/$(CONFIG)/timer_heap_test $(BINDIR)/$(CONFIG)/timer_list_test $(BINDIR)/$(CONFIG)/timers_test $(BINDIR)/$(CONFIG)/transport_metadata_test $(BINDIR)/$(CONFIG)/transport_security_test $(BINDIR)/$(CONFIG)/udp_server_test $(BINDIR)/$(CONFIG)/uri_parser_test $(BINDIR)/$(CONFIG)/workqueue_test $(BINDIR)/$(CONFIG)/h2_compress_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_compress_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_compress_call_creds_test $(BINDIR)/$(CONFIG)/h2_compress_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_compress_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_compress_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_compress_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_compress_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_compress_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_compress_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_compress_channel_connectivity_test $(BINDIR)/$(CONFIG)/h2_compress_compressed_payload_test $(BINDIR)/$(CONFIG)/h2_compress_default_host_test $(BINDIR)/$(CONFIG)/h2_compress_disappearing_server_test $(BINDIR)/$(CONFIG)/h2_compress_empty_batch_test $(BINDIR)/$(CONFIG)/h2_compress_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_compress_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_compress_hpack_size_test $(BINDIR)/$(CONFIG)/h2_compress_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_compress_large_metadata_test $(BINDIR)/$(CONFIG)/h2_compress_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_compress_max_message_length_test $(BINDIR)/$(CONFIG)/h2_compress_metadata_test $(BINDIR)/$(CONFIG)/h2_compress_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_compress_no_op_test $(BINDIR)/$(CONFIG)/h2_compress_payload_test $(BINDIR)/$(CONFIG)/h2_compress_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_compress_registered_call_test $(BINDIR)/$(CONFIG)/h2_compress_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_compress_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_compress_server_finishes_request_test $(BINDIR)/$(CONFIG)/h2_compress_shutdown_finishes_calls_test $(BINDIR)/$(CONFIG)/h2_compress_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/h2_compress_simple_delayed_request_test $(BINDIR)/$(CONFIG)/h2_compress_simple_request_test $(BINDIR)/$(CONFIG)/h2_compress_trailing_metadata_test $(BINDIR)/$(CONFIG)/h2_fakesec_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_fakesec_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_fakesec_call_creds_test $(BINDIR)/$(CONFIG)/h2_fakesec_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_fakesec_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_fakesec_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_fakesec_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_fakesec_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_fakesec_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_fakesec_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_fakesec_channel_connectivity_test $(BINDIR)/$(CONFIG)/h2_fakesec_compressed_payload_test $(BINDIR)/$(CONFIG)/h2_fakesec_default_host_test $(BINDIR)/$(CONFIG)/h2_fakesec_disappearing_server_test $(BINDIR)/$(CONFIG)/h2_fakesec_empty_batch_test $(BINDIR)/$(CONFIG)/h2_fakesec_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_fakesec_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_fakesec_hpack_size_test $(BINDIR)/$(CONFIG)/h2_fakesec_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_fakesec_large_metadata_test $(BINDIR)/$(CONFIG)/h2_fakesec_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_fakesec_max_message_length_test $(BINDIR)/$(CONFIG)/h2_fakesec_metadata_test $(BINDIR)/$(CONFIG)/h2_fakesec_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_fakesec_no_op_test $(BINDIR)/$(CONFIG)/h2_fakesec_payload_test $(BINDIR)/$(CONFIG)/h2_fakesec_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_fakesec_registered_call_test $(BINDIR)/$(CONFIG)/h2_fakesec_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_fakesec_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_fakesec_server_finishes_request_test $(BINDIR)/$(CONFIG)/h2_fakesec_shutdown_finishes_calls_test $(BINDIR)/$(CONFIG)/h2_fakesec_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/h2_fakesec_simple_delayed_request_test $(BINDIR)/$(CONFIG)/h2_fakesec_simple_request_test $(BINDIR)/$(CONFIG)/h2_fakesec_trailing_metadata_test $(BINDIR)/$(CONFIG)/h2_full_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_full_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_full_call_creds_test $(BINDIR)/$(CONFIG)/h2_full_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_full_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_full_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_full_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_full_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_full_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_full_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_full_channel_connectivity_test $(BINDIR)/$(CONFIG)/h2_full_compressed_payload_test $(BINDIR)/$(CONFIG)/h2_full_default_host_test $(BINDIR)/$(CONFIG)/h2_full_disappearing_server_test $(BINDIR)/$(CONFIG)/h2_full_empty_batch_test $(BINDIR)/$(CONFIG)/h2_full_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_full_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_full_hpack_size_test $(BINDIR)/$(CONFIG)/h2_full_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_full_large_metadata_test $(BINDIR)/$(CONFIG)/h2_full_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_full_max_message_length_test $(BINDIR)/$(CONFIG)/h2_full_metadata_test $(BINDIR)/$(CONFIG)/h2_full_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_full_no_op_test $(BINDIR)/$(CONFIG)/h2_full_payload_test $(BINDIR)/$(CONFIG)/h2_full_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_full_registered_call_test $(BINDIR)/$(CONFIG)/h2_full_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_full_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_full_server_finishes_request_test $(BINDIR)/$(CONFIG)/h2_full_shutdown_finishes_calls_test $(BINDIR)/$(CONFIG)/h2_full_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/h2_full_simple_delayed_request_test $(BINDIR)/$(CONFIG)/h2_full_simple_request_test $(BINDIR)/$(CONFIG)/h2_full_trailing_metadata_test $(BINDIR)/$(CONFIG)/h2_full+poll_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_full+poll_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_full+poll_call_creds_test $(BINDIR)/$(CONFIG)/h2_full+poll_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_full+poll_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_full+poll_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_full+poll_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_full+poll_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_full+poll_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_full+poll_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_full+poll_channel_connectivity_test $(BINDIR)/$(CONFIG)/h2_full+poll_compressed_payload_test $(BINDIR)/$(CONFIG)/h2_full+poll_default_host_test $(BINDIR)/$(CONFIG)/h2_full+poll_disappearing_server_test $(BINDIR)/$(CONFIG)/h2_full+poll_empty_batch_test $(BINDIR)/$(CONFIG)/h2_full+poll_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_full+poll_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_full+poll_hpack_size_test $(BINDIR)/$(CONFIG)/h2_full+poll_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_full+poll_large_metadata_test $(BINDIR)/$(CONFIG)/h2_full+poll_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_full+poll_max_message_length_test $(BINDIR)/$(CONFIG)/h2_full+poll_metadata_test $(BINDIR)/$(CONFIG)/h2_full+poll_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_full+poll_no_op_test $(BINDIR)/$(CONFIG)/h2_full+poll_payload_test $(BINDIR)/$(CONFIG)/h2_full+poll_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_full+poll_registered_call_test $(BINDIR)/$(CONFIG)/h2_full+poll_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_full+poll_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_full+poll_server_finishes_request_test $(BINDIR)/$(CONFIG)/h2_full+poll_shutdown_finishes_calls_test $(BINDIR)/$(CONFIG)/h2_full+poll_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/h2_full+poll_simple_delayed_request_test $(BINDIR)/$(CONFIG)/h2_full+poll_simple_request_test $(BINDIR)/$(CONFIG)/h2_full+poll_trailing_metadata_test $(BINDIR)/$(CONFIG)/h2_oauth2_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_oauth2_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_oauth2_call_creds_test $(BINDIR)/$(CONFIG)/h2_oauth2_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_oauth2_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_oauth2_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_oauth2_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_oauth2_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_oauth2_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_oauth2_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_oauth2_channel_connectivity_test $(BINDIR)/$(CONFIG)/h2_oauth2_compressed_payload_test $(BINDIR)/$(CONFIG)/h2_oauth2_default_host_test $(BINDIR)/$(CONFIG)/h2_oauth2_disappearing_server_test $(BINDIR)/$(CONFIG)/h2_oauth2_empty_batch_test $(BINDIR)/$(CONFIG)/h2_oauth2_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_oauth2_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_oauth2_hpack_size_test $(BINDIR)/$(CONFIG)/h2_oauth2_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_oauth2_large_metadata_test $(BINDIR)/$(CONFIG)/h2_oauth2_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_oauth2_max_message_length_test $(BINDIR)/$(CONFIG)/h2_oauth2_metadata_test $(BINDIR)/$(CONFIG)/h2_oauth2_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_oauth2_no_op_test $(BINDIR)/$(CONFIG)/h2_oauth2_payload_test $(BINDIR)/$(CONFIG)/h2_oauth2_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_oauth2_registered_call_test $(BINDIR)/$(CONFIG)/h2_oauth2_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_oauth2_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_oauth2_server_finishes_request_test $(BINDIR)/$(CONFIG)/h2_oauth2_shutdown_finishes_calls_test $(BINDIR)/$(CONFIG)/h2_oauth2_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/h2_oauth2_simple_delayed_request_test $(BINDIR)/$(CONFIG)/h2_oauth2_simple_request_test $(BINDIR)/$(CONFIG)/h2_oauth2_trailing_metadata_test $(BINDIR)/$(CONFIG)/h2_proxy_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_proxy_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_proxy_call_creds_test $(BINDIR)/$(CONFIG)/h2_proxy_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_proxy_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_proxy_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_proxy_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_proxy_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_proxy_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_proxy_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_proxy_default_host_test $(BINDIR)/$(CONFIG)/h2_proxy_disappearing_server_test $(BINDIR)/$(CONFIG)/h2_proxy_empty_batch_test $(BINDIR)/$(CONFIG)/h2_proxy_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_proxy_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_proxy_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_proxy_large_metadata_test $(BINDIR)/$(CONFIG)/h2_proxy_max_message_length_test $(BINDIR)/$(CONFIG)/h2_proxy_metadata_test $(BINDIR)/$(CONFIG)/h2_proxy_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_proxy_no_op_test $(BINDIR)/$(CONFIG)/h2_proxy_payload_test $(BINDIR)/$(CONFIG)/h2_proxy_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_proxy_registered_call_test $(BINDIR)/$(CONFIG)/h2_proxy_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_proxy_server_finishes_request_test $(BINDIR)/$(CONFIG)/h2_proxy_shutdown_finishes_calls_test $(BINDIR)/$(CONFIG)/h2_proxy_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/h2_proxy_simple_delayed_request_test $(BINDIR)/$(CONFIG)/h2_proxy_simple_request_test $(BINDIR)/$(CONFIG)/h2_proxy_trailing_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_sockpair_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair_call_creds_test $(BINDIR)/$(CONFIG)/h2_sockpair_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_sockpair_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_sockpair_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_sockpair_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_sockpair_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_sockpair_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_sockpair_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_sockpair_compressed_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair_empty_batch_test $(BINDIR)/$(CONFIG)/h2_sockpair_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_sockpair_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_sockpair_hpack_size_test $(BINDIR)/$(CONFIG)/h2_sockpair_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_sockpair_large_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_sockpair_max_message_length_test $(BINDIR)/$(CONFIG)/h2_sockpair_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_sockpair_no_op_test $(BINDIR)/$(CONFIG)/h2_sockpair_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_sockpair_registered_call_test $(BINDIR)/$(CONFIG)/h2_sockpair_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_sockpair_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair_server_finishes_request_test $(BINDIR)/$(CONFIG)/h2_sockpair_shutdown_finishes_calls_test $(BINDIR)/$(CONFIG)/h2_sockpair_shutdown_finishes_tags_test $(BINDIR)/$(CONFIG)/h2_sockpair_simple_request_test $(BINDIR)/$(CONFIG)/h2_sockpair_trailing_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_bad_hostname_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_binary_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_call_creds_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_after_accept_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_after_client_done_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_after_invoke_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_before_invoke_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_in_a_vacuum_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_with_status_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_census_simple_request_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_compressed_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_empty_batch_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_large_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_max_message_length_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_no_op_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_registered_call_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_server_finishes_request_test 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$(BINDIR)/$(CONFIG)/h2_sockpair_1byte_graceful_server_shutdown_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_high_initial_seqno_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_hpack_size_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_invoke_large_request_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_large_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_max_concurrent_streams_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_max_message_length_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_metadata_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_negative_deadline_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_no_op_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_ping_pong_streaming_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_registered_call_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_request_with_flags_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_request_with_payload_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_server_finishes_request_test 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$(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_after_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_before_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_in_a_vacuum_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_cancel_with_status_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_census_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_compressed_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_empty_batch_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_graceful_server_shutdown_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_high_initial_seqno_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_invoke_large_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_large_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_max_concurrent_streams_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_max_message_length_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_negative_deadline_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_no_op_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_ping_pong_streaming_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_registered_call_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_request_with_flags_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_request_with_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_server_finishes_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_shutdown_finishes_calls_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_shutdown_finishes_tags_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair+trace_trailing_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_bad_hostname_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_binary_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_cancel_after_accept_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_cancel_after_client_done_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_cancel_after_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_cancel_before_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_cancel_in_a_vacuum_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_cancel_with_status_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_census_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_compressed_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_empty_batch_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_graceful_server_shutdown_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_high_initial_seqno_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_hpack_size_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_invoke_large_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_large_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_max_concurrent_streams_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_max_message_length_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_negative_deadline_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_no_op_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_ping_pong_streaming_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_registered_call_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_request_with_flags_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_request_with_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_server_finishes_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_shutdown_finishes_calls_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_shutdown_finishes_tags_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_trailing_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_bad_hostname_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_binary_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_cancel_after_accept_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_cancel_after_client_done_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_cancel_after_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_cancel_before_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_cancel_in_a_vacuum_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_cancel_with_status_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_census_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_compressed_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_empty_batch_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_graceful_server_shutdown_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_high_initial_seqno_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_hpack_size_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_invoke_large_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_large_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_max_concurrent_streams_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_max_message_length_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_negative_deadline_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_no_op_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_ping_pong_streaming_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_registered_call_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_request_with_flags_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_request_with_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_server_finishes_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_shutdown_finishes_calls_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_shutdown_finishes_tags_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uchannel_trailing_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_bad_hostname_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_binary_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_cancel_after_accept_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_cancel_after_client_done_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_cancel_after_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_cancel_before_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_cancel_in_a_vacuum_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_cancel_with_status_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_census_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_channel_connectivity_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_compressed_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_disappearing_server_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_empty_batch_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_graceful_server_shutdown_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_high_initial_seqno_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_hpack_size_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_invoke_large_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_large_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_max_concurrent_streams_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_max_message_length_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_negative_deadline_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_no_op_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_ping_pong_streaming_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_registered_call_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_request_with_flags_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_request_with_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_server_finishes_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_shutdown_finishes_calls_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_shutdown_finishes_tags_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_simple_delayed_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds_trailing_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_bad_hostname_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_binary_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_cancel_after_accept_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_cancel_after_client_done_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_cancel_after_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_cancel_before_invoke_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_cancel_in_a_vacuum_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_cancel_with_status_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_census_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_channel_connectivity_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_compressed_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_disappearing_server_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_empty_batch_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_graceful_server_shutdown_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_high_initial_seqno_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_hpack_size_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_invoke_large_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_large_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_max_concurrent_streams_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_max_message_length_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_metadata_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_negative_deadline_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_no_op_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_ping_pong_streaming_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_registered_call_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_request_with_flags_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_request_with_payload_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_server_finishes_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_shutdown_finishes_calls_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_shutdown_finishes_tags_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_simple_delayed_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_simple_request_nosec_test $(BINDIR)/$(CONFIG)/h2_uds+poll_trailing_metadata_nosec_test $(BINDIR)/$(CONFIG)/connection_prefix_bad_client_test $(BINDIR)/$(CONFIG)/headers_bad_client_test $(BINDIR)/$(CONFIG)/initial_settings_frame_bad_client_test
 
 buildtests_cxx: buildtests_zookeeper privatelibs_cxx $(BINDIR)/$(CONFIG)/async_end2end_test $(BINDIR)/$(CONFIG)/async_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/async_unary_ping_pong_test $(BINDIR)/$(CONFIG)/auth_property_iterator_test $(BINDIR)/$(CONFIG)/channel_arguments_test $(BINDIR)/$(CONFIG)/cli_call_test $(BINDIR)/$(CONFIG)/client_crash_test $(BINDIR)/$(CONFIG)/client_crash_test_server $(BINDIR)/$(CONFIG)/credentials_test $(BINDIR)/$(CONFIG)/cxx_byte_buffer_test $(BINDIR)/$(CONFIG)/cxx_slice_test $(BINDIR)/$(CONFIG)/cxx_string_ref_test $(BINDIR)/$(CONFIG)/cxx_time_test $(BINDIR)/$(CONFIG)/end2end_test $(BINDIR)/$(CONFIG)/generic_end2end_test $(BINDIR)/$(CONFIG)/grpc_cli $(BINDIR)/$(CONFIG)/interop_client $(BINDIR)/$(CONFIG)/interop_server $(BINDIR)/$(CONFIG)/interop_test $(BINDIR)/$(CONFIG)/metrics_client $(BINDIR)/$(CONFIG)/mock_test $(BINDIR)/$(CONFIG)/qps_interarrival_test $(BINDIR)/$(CONFIG)/qps_openloop_test $(BINDIR)/$(CONFIG)/qps_test $(BINDIR)/$(CONFIG)/reconnect_interop_client $(BINDIR)/$(CONFIG)/reconnect_interop_server $(BINDIR)/$(CONFIG)/secure_auth_context_test $(BINDIR)/$(CONFIG)/secure_sync_unary_ping_pong_test $(BINDIR)/$(CONFIG)/server_crash_test $(BINDIR)/$(CONFIG)/server_crash_test_client $(BINDIR)/$(CONFIG)/shutdown_test $(BINDIR)/$(CONFIG)/status_test $(BINDIR)/$(CONFIG)/streaming_throughput_test $(BINDIR)/$(CONFIG)/stress_test $(BINDIR)/$(CONFIG)/sync_streaming_ping_pong_test $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test $(BINDIR)/$(CONFIG)/thread_stress_test
 
@@ -1970,6 +1971,10 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/httpcli_parser_test || ( echo test httpcli_parser_test failed ; exit 1 )
 	$(E) "[RUN]     Testing httpcli_test"
 	$(Q) $(BINDIR)/$(CONFIG)/httpcli_test || ( echo test httpcli_test failed ; exit 1 )
+	$(E) "[RUN]     Testing init_test"
+	$(Q) $(BINDIR)/$(CONFIG)/init_test || ( echo test init_test failed ; exit 1 )
+	$(E) "[RUN]     Testing invalid_call_argument_test"
+	$(Q) $(BINDIR)/$(CONFIG)/invalid_call_argument_test || ( echo test invalid_call_argument_test failed ; exit 1 )
 	$(E) "[RUN]     Testing json_rewrite_test"
 	$(Q) $(BINDIR)/$(CONFIG)/json_rewrite_test || ( echo test json_rewrite_test failed ; exit 1 )
 	$(E) "[RUN]     Testing json_test"
@@ -1980,8 +1985,6 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/lb_policies_test || ( echo test lb_policies_test failed ; exit 1 )
 	$(E) "[RUN]     Testing message_compress_test"
 	$(Q) $(BINDIR)/$(CONFIG)/message_compress_test || ( echo test message_compress_test failed ; exit 1 )
-	$(E) "[RUN]     Testing multi_init_test"
-	$(Q) $(BINDIR)/$(CONFIG)/multi_init_test || ( echo test multi_init_test failed ; exit 1 )
 	$(E) "[RUN]     Testing multiple_server_queues_test"
 	$(Q) $(BINDIR)/$(CONFIG)/multiple_server_queues_test || ( echo test multiple_server_queues_test failed ; exit 1 )
 	$(E) "[RUN]     Testing murmur_hash_test"
@@ -9702,6 +9705,64 @@ endif
 endif
 
 
+INIT_TEST_SRC = \
+    test/core/surface/init_test.c \
+
+INIT_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(INIT_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/init_test: openssl_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/init_test: $(INIT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(INIT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/init_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/surface/init_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+deps_init_test: $(INIT_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(INIT_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
+INVALID_CALL_ARGUMENT_TEST_SRC = \
+    test/core/end2end/invalid_call_argument_test.c \
+
+INVALID_CALL_ARGUMENT_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(INVALID_CALL_ARGUMENT_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/invalid_call_argument_test: openssl_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/invalid_call_argument_test: $(INVALID_CALL_ARGUMENT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(INVALID_CALL_ARGUMENT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/invalid_call_argument_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/end2end/invalid_call_argument_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+deps_invalid_call_argument_test: $(INVALID_CALL_ARGUMENT_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(INVALID_CALL_ARGUMENT_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 JSON_REWRITE_SRC = \
     test/core/json/json_rewrite.c \
 
@@ -9905,35 +9966,6 @@ endif
 endif
 
 
-MULTI_INIT_TEST_SRC = \
-    test/core/surface/multi_init_test.c \
-
-MULTI_INIT_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(MULTI_INIT_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/multi_init_test: openssl_dep_error
-
-else
-
-$(BINDIR)/$(CONFIG)/multi_init_test: $(MULTI_INIT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(MULTI_INIT_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/multi_init_test
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/core/surface/multi_init_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-deps_multi_init_test: $(MULTI_INIT_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(MULTI_INIT_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
 MULTIPLE_SERVER_QUEUES_TEST_SRC = \
     test/core/end2end/multiple_server_queues_test.c \
 
diff --git a/build.yaml b/build.yaml
index b993ff99ac..388b0a6e01 100644
--- a/build.yaml
+++ b/build.yaml
@@ -1325,6 +1325,26 @@ targets:
   - mac
   - linux
   - posix
+- name: init_test
+  build: test
+  language: c
+  src:
+  - test/core/surface/init_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
+- name: invalid_call_argument_test
+  build: test
+  language: c
+  src:
+  - test/core/end2end/invalid_call_argument_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
 - name: json_rewrite
   build: test
   run: false
@@ -1398,16 +1418,6 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-- name: multi_init_test
-  build: test
-  language: c
-  src:
-  - test/core/surface/multi_init_test.c
-  deps:
-  - grpc_test_util
-  - grpc
-  - gpr_test_util
-  - gpr
 - name: multiple_server_queues_test
   build: test
   language: c
diff --git a/examples/objective-c/auth_sample/Podfile b/examples/objective-c/auth_sample/Podfile
index ea70511dc6..7affe08743 100644
--- a/examples/objective-c/auth_sample/Podfile
+++ b/examples/objective-c/auth_sample/Podfile
@@ -2,6 +2,7 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
 pod 'Protobuf', :path => "../../../third_party/protobuf"
+pod 'BoringSSL', :podspec => "../../../src/objective-c"
 pod 'gRPC', :path => "../../.."
 
 target 'AuthSample' do
diff --git a/examples/objective-c/helloworld/Podfile b/examples/objective-c/helloworld/Podfile
index 16af075a9f..eebf05470d 100644
--- a/examples/objective-c/helloworld/Podfile
+++ b/examples/objective-c/helloworld/Podfile
@@ -2,6 +2,7 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
 pod 'Protobuf', :path => "../../../third_party/protobuf"
+pod 'BoringSSL', :podspec => "../../../src/objective-c"
 pod 'gRPC', :path => "../../.."
 
 target 'HelloWorld' do
diff --git a/examples/objective-c/route_guide/Podfile b/examples/objective-c/route_guide/Podfile
index efa46bba4f..b9f2fefd6d 100644
--- a/examples/objective-c/route_guide/Podfile
+++ b/examples/objective-c/route_guide/Podfile
@@ -3,6 +3,7 @@ platform :ios, '8.0'
 
 target 'RouteGuideClient' do
   pod 'Protobuf', :path => "../../../third_party/protobuf"
+  pod 'BoringSSL', :podspec => "../../../src/objective-c"
   pod 'gRPC', :path => "../../.."
   # Depend on the generated RouteGuide library.
   pod 'RouteGuide', :path => '.'
diff --git a/gRPC.podspec b/gRPC.podspec
index 0262479f61..f20776dc1d 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -589,7 +589,7 @@ Pod::Spec.new do |s|
 
     ss.requires_arc = false
     ss.libraries = 'z'
-    ss.dependency 'OpenSSL', '~> 1.0.204.1'
+    ss.dependency 'BoringSSL', '~> 1.0'
 
     # ss.compiler_flags = '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
   end
diff --git a/src/core/surface/call.h b/src/core/surface/call.h
index 24ab9c33bb..20907ac6d6 100644
--- a/src/core/surface/call.h
+++ b/src/core/surface/call.h
@@ -91,19 +91,6 @@ void grpc_call_log_batch(char *file, int line, gpr_log_severity severity,
                          grpc_call *call, const grpc_op *ops, size_t nops,
                          void *tag);
 
-void grpc_server_log_request_call(char *file, int line,
-                                  gpr_log_severity severity,
-                                  grpc_server *server, grpc_call **call,
-                                  grpc_call_details *details,
-                                  grpc_metadata_array *initial_metadata,
-                                  grpc_completion_queue *cq_bound_to_call,
-                                  grpc_completion_queue *cq_for_notification,
-                                  void *tag);
-
-void grpc_server_log_shutdown(char *file, int line, gpr_log_severity severity,
-                              grpc_server *server, grpc_completion_queue *cq,
-                              void *tag);
-
 /* Set a context pointer.
    No thread safety guarantees are made wrt this value. */
 void grpc_call_context_set(grpc_call *call, grpc_context_index elem,
diff --git a/src/core/surface/call_log_batch.c b/src/core/surface/call_log_batch.c
index 16212f6386..f4cd8375c2 100644
--- a/src/core/surface/call_log_batch.c
+++ b/src/core/surface/call_log_batch.c
@@ -117,26 +117,3 @@ void grpc_call_log_batch(char *file, int line, gpr_log_severity severity,
   }
 }
 
-void grpc_server_log_request_call(char *file, int line,
-                                  gpr_log_severity severity,
-                                  grpc_server *server, grpc_call **call,
-                                  grpc_call_details *details,
-                                  grpc_metadata_array *initial_metadata,
-                                  grpc_completion_queue *cq_bound_to_call,
-                                  grpc_completion_queue *cq_for_notification,
-                                  void *tag) {
-  gpr_log(file, line, severity,
-          "grpc_server_request_call(server=%p, call=%p, details=%p, "
-          "initial_metadata=%p, cq_bound_to_call=%p, cq_for_notification=%p, "
-          "tag=%p)",
-          server, call, details, initial_metadata, cq_bound_to_call,
-          cq_for_notification, tag);
-}
-
-void grpc_server_log_shutdown(char *file, int line, gpr_log_severity severity,
-                              grpc_server *server, grpc_completion_queue *cq,
-                              void *tag) {
-  gpr_log(file, line, severity,
-          "grpc_server_shutdown_and_notify(server=%p, cq=%p, tag=%p)", server,
-          cq, tag);
-}
diff --git a/src/core/transport/chttp2/hpack_parser.c b/src/core/transport/chttp2/hpack_parser.c
index 2697e6ce67..e5453000ec 100644
--- a/src/core/transport/chttp2/hpack_parser.c
+++ b/src/core/transport/chttp2/hpack_parser.c
@@ -728,6 +728,7 @@ static int finish_indexed_field(grpc_chttp2_hpack_parser *p,
 /* parse an indexed field with index < 127 */
 static int parse_indexed_field(grpc_chttp2_hpack_parser *p,
                                const gpr_uint8 *cur, const gpr_uint8 *end) {
+  p->dynamic_table_update_allowed = 0;
   p->index = (*cur) & 0x7f;
   return finish_indexed_field(p, cur + 1, end);
 }
@@ -737,6 +738,7 @@ static int parse_indexed_field_x(grpc_chttp2_hpack_parser *p,
                                  const gpr_uint8 *cur, const gpr_uint8 *end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       finish_indexed_field};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = 0x7f;
   p->parsing.value = &p->index;
@@ -769,6 +771,7 @@ static int parse_lithdr_incidx(grpc_chttp2_hpack_parser *p,
                                const gpr_uint8 *cur, const gpr_uint8 *end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_incidx};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0x3f;
   return parse_string_prefix(p, cur + 1, end);
@@ -780,6 +783,7 @@ static int parse_lithdr_incidx_x(grpc_chttp2_hpack_parser *p,
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_string_prefix, parse_value_string_with_indexed_key,
       finish_lithdr_incidx};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = 0x3f;
   p->parsing.value = &p->index;
@@ -792,6 +796,7 @@ static int parse_lithdr_incidx_v(grpc_chttp2_hpack_parser *p,
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_key_string, parse_string_prefix,
       parse_value_string_with_literal_key, finish_lithdr_incidx_v};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   return parse_string_prefix(p, cur + 1, end);
 }
@@ -821,6 +826,7 @@ static int parse_lithdr_notidx(grpc_chttp2_hpack_parser *p,
                                const gpr_uint8 *cur, const gpr_uint8 *end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_notidx};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0xf;
   return parse_string_prefix(p, cur + 1, end);
@@ -832,6 +838,7 @@ static int parse_lithdr_notidx_x(grpc_chttp2_hpack_parser *p,
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_string_prefix, parse_value_string_with_indexed_key,
       finish_lithdr_notidx};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = 0xf;
   p->parsing.value = &p->index;
@@ -844,6 +851,7 @@ static int parse_lithdr_notidx_v(grpc_chttp2_hpack_parser *p,
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_key_string, parse_string_prefix,
       parse_value_string_with_literal_key, finish_lithdr_notidx_v};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   return parse_string_prefix(p, cur + 1, end);
 }
@@ -873,6 +881,7 @@ static int parse_lithdr_nvridx(grpc_chttp2_hpack_parser *p,
                                const gpr_uint8 *cur, const gpr_uint8 *end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_value_string_with_indexed_key, finish_lithdr_nvridx};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = (*cur) & 0xf;
   return parse_string_prefix(p, cur + 1, end);
@@ -884,6 +893,7 @@ static int parse_lithdr_nvridx_x(grpc_chttp2_hpack_parser *p,
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_string_prefix, parse_value_string_with_indexed_key,
       finish_lithdr_nvridx};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   p->index = 0xf;
   p->parsing.value = &p->index;
@@ -896,6 +906,7 @@ static int parse_lithdr_nvridx_v(grpc_chttp2_hpack_parser *p,
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       parse_key_string, parse_string_prefix,
       parse_value_string_with_literal_key, finish_lithdr_nvridx_v};
+  p->dynamic_table_update_allowed = 0;
   p->next_state = and_then;
   return parse_string_prefix(p, cur + 1, end);
 }
@@ -911,6 +922,10 @@ static int finish_max_tbl_size(grpc_chttp2_hpack_parser *p,
 /* parse a max table size change, max size < 15 */
 static int parse_max_tbl_size(grpc_chttp2_hpack_parser *p, const gpr_uint8 *cur,
                               const gpr_uint8 *end) {
+  if (p->dynamic_table_update_allowed == 0) {
+    return 0;
+  }
+  p->dynamic_table_update_allowed--;
   p->index = (*cur) & 0x1f;
   return finish_max_tbl_size(p, cur + 1, end);
 }
@@ -920,6 +935,10 @@ static int parse_max_tbl_size_x(grpc_chttp2_hpack_parser *p,
                                 const gpr_uint8 *cur, const gpr_uint8 *end) {
   static const grpc_chttp2_hpack_parser_state and_then[] = {
       finish_max_tbl_size};
+  if (p->dynamic_table_update_allowed == 0) {
+    return 0;
+  }
+  p->dynamic_table_update_allowed--;
   p->next_state = and_then;
   p->index = 0x1f;
   p->parsing.value = &p->index;
@@ -1357,6 +1376,7 @@ void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser *p) {
   p->value.str = NULL;
   p->value.capacity = 0;
   p->value.length = 0;
+  p->dynamic_table_update_allowed = 2;
   grpc_chttp2_hptbl_init(&p->table);
 }
 
@@ -1412,6 +1432,7 @@ grpc_chttp2_parse_error grpc_chttp2_header_parser_parse(
     parser->on_header_user_data = NULL;
     parser->is_boundary = 0xde;
     parser->is_eof = 0xde;
+    parser->dynamic_table_update_allowed = 2;
   }
   GPR_TIMER_END("grpc_chttp2_hpack_parser_parse", 0);
   return GRPC_CHTTP2_PARSE_OK;
diff --git a/src/core/transport/chttp2/hpack_parser.h b/src/core/transport/chttp2/hpack_parser.h
index fb894b5735..bd36357124 100644
--- a/src/core/transport/chttp2/hpack_parser.h
+++ b/src/core/transport/chttp2/hpack_parser.h
@@ -85,6 +85,8 @@ struct grpc_chttp2_hpack_parser {
   gpr_uint8 binary;
   /* is the current string huffman encoded? */
   gpr_uint8 huff;
+  /* is a dynamic table update allowed? */
+  gpr_uint8 dynamic_table_update_allowed;
   /* set by higher layers, used by grpc_chttp2_header_parser_parse to signal
      it should append a metadata boundary at the end of frame */
   gpr_uint8 is_boundary;
diff --git a/src/core/tsi/transport_security.c b/src/core/tsi/transport_security.c
index c39e584496..db219a50a6 100644
--- a/src/core/tsi/transport_security.c
+++ b/src/core/tsi/transport_security.c
@@ -145,7 +145,9 @@ void tsi_frame_protector_destroy(tsi_frame_protector *self) {
 tsi_result tsi_handshaker_get_bytes_to_send_to_peer(tsi_handshaker *self,
                                                     unsigned char *bytes,
                                                     size_t *bytes_size) {
-  if (self == NULL) return TSI_INVALID_ARGUMENT;
+  if (self == NULL || bytes == NULL || bytes_size == NULL) {
+    return TSI_INVALID_ARGUMENT;
+  }
   if (self->frame_protector_created) return TSI_FAILED_PRECONDITION;
   return self->vtable->get_bytes_to_send_to_peer(self, bytes, bytes_size);
 }
@@ -153,7 +155,9 @@ tsi_result tsi_handshaker_get_bytes_to_send_to_peer(tsi_handshaker *self,
 tsi_result tsi_handshaker_process_bytes_from_peer(tsi_handshaker *self,
                                                   const unsigned char *bytes,
                                                   size_t *bytes_size) {
-  if (self == NULL) return TSI_INVALID_ARGUMENT;
+  if (self == NULL || bytes == NULL || bytes_size == NULL) {
+    return TSI_INVALID_ARGUMENT;
+  }
   if (self->frame_protector_created) return TSI_FAILED_PRECONDITION;
   return self->vtable->process_bytes_from_peer(self, bytes, bytes_size);
 }
diff --git a/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs b/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
index 1c14c5bb5b..f77e9c6573 100644
--- a/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
+++ b/src/csharp/Grpc.Auth/GoogleAuthInterceptors.cs
@@ -57,9 +57,9 @@ namespace Grpc.Auth
         /// <returns>The interceptor.</returns>
         public static AsyncAuthInterceptor FromCredential(ITokenAccess credential)
         {
-            return new AsyncAuthInterceptor(async (authUri, metadata) =>
+            return new AsyncAuthInterceptor(async (context, metadata) =>
             {
-                var accessToken = await credential.GetAccessTokenForRequestAsync(authUri, CancellationToken.None).ConfigureAwait(false);
+                var accessToken = await credential.GetAccessTokenForRequestAsync(context.ServiceUrl, CancellationToken.None).ConfigureAwait(false);
                 metadata.Add(CreateBearerTokenHeader(accessToken));
             });
         }
@@ -72,7 +72,7 @@ namespace Grpc.Auth
         public static AsyncAuthInterceptor FromAccessToken(string accessToken)
         {
             Preconditions.CheckNotNull(accessToken);
-            return new AsyncAuthInterceptor(async (authUri, metadata) =>
+            return new AsyncAuthInterceptor(async (context, metadata) =>
             {
                 metadata.Add(CreateBearerTokenHeader(accessToken));
             });
diff --git a/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs b/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
new file mode 100644
index 0000000000..5c9ab04812
--- /dev/null
+++ b/src/csharp/Grpc.Core/AsyncAuthInterceptor.cs
@@ -0,0 +1,84 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// Asynchronous authentication interceptor for <see cref="CallCredentials"/>.
+    /// </summary>
+    /// <param name="context">The interceptor context.</param>
+    /// <param name="metadata">Metadata to populate with entries that will be added to outgoing call's headers.</param>
+    /// <returns></returns>
+    public delegate Task AsyncAuthInterceptor(AuthInterceptorContext context, Metadata metadata);
+
+    /// <summary>
+    /// Context for an RPC being intercepted by <see cref="AsyncAuthInterceptor"/>.
+    /// </summary>
+    public class AuthInterceptorContext
+    {
+        readonly string serviceUrl;
+        readonly string methodName;
+
+        /// <summary>
+        /// Initializes a new instance of <c>AuthInterceptorContext</c>.
+        /// </summary>
+        public AuthInterceptorContext(string serviceUrl, string methodName)
+        {
+            this.serviceUrl = Preconditions.CheckNotNull(serviceUrl);
+            this.methodName = Preconditions.CheckNotNull(methodName);
+        }
+
+        /// <summary>
+        /// The fully qualified service URL for the RPC being called.
+        /// </summary>
+        public string ServiceUrl
+        {
+            get { return serviceUrl; }
+        }
+
+        /// <summary>
+        /// The method name of the RPC being called.
+        /// </summary>
+        public string MethodName
+        {
+            get { return methodName; }
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core/CallCredentials.cs b/src/csharp/Grpc.Core/CallCredentials.cs
index 5ea179dfea..a71c8904fe 100644
--- a/src/csharp/Grpc.Core/CallCredentials.cs
+++ b/src/csharp/Grpc.Core/CallCredentials.cs
@@ -41,14 +41,6 @@ using Grpc.Core.Utils;
 namespace Grpc.Core
 {
     /// <summary>
-    /// Asynchronous authentication interceptor for <see cref="CallCredentials"/>.
-    /// </summary>
-    /// <param name="authUri">URL of a service to which current remote call needs to authenticate</param>
-    /// <param name="metadata">Metadata to populate with entries that will be added to outgoing call's headers.</param>
-    /// <returns></returns>
-    public delegate Task AsyncAuthInterceptor(string authUri, Metadata metadata);
-
-    /// <summary>
     /// Client-side call credentials. Provide authorization with per-call granularity.
     /// </summary>
     public abstract class CallCredentials
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index 56a06f4a9b..5b3da7c6c9 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -46,6 +46,7 @@
   <ItemGroup>
     <Compile Include="AsyncDuplexStreamingCall.cs" />
     <Compile Include="AsyncServerStreamingCall.cs" />
+    <Compile Include="AsyncAuthInterceptor.cs" />
     <Compile Include="CallCredentials.cs" />
     <Compile Include="IClientStreamWriter.cs" />
     <Compile Include="Internal\NativeMetadataCredentialsPlugin.cs" />
@@ -148,8 +149,8 @@
     <Error Condition="!Exists('..\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.openssl.redist.targets'))" />
     <Error Condition="!Exists('..\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.zlib.redist.targets'))" />
   </Target>
-  <ItemGroup />
-  <ItemGroup />
   <Import Project="..\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.openssl.redist.targets" Condition="Exists('..\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.openssl.redist.targets')" />
   <Import Project="..\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.zlib.redist.targets" Condition="Exists('..\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\portable-net45+netcore45+wpa81+wp8\grpc.dependencies.zlib.redist.targets')" />
-</Project>
\ No newline at end of file
+  <ItemGroup />
+  <ItemGroup />
+</Project>
diff --git a/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs b/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
index 4c086048d2..8bb646d303 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs
@@ -38,7 +38,7 @@ using Grpc.Core.Utils;
 
 namespace Grpc.Core.Internal
 {
-    internal delegate void NativeMetadataInterceptor(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy);
+    internal delegate void NativeMetadataInterceptor(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr methodNamePtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy);
 
     internal class NativeMetadataCredentialsPlugin
     {
@@ -71,7 +71,7 @@ namespace Grpc.Core.Internal
             get { return credentials; }
         }
 
-        private void NativeMetadataInterceptorHandler(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy)
+        private void NativeMetadataInterceptorHandler(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr methodNamePtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy)
         {
             if (isDestroy)
             {
@@ -81,8 +81,9 @@ namespace Grpc.Core.Internal
 
             try
             {
-                string serviceUrl = Marshal.PtrToStringAnsi(serviceUrlPtr);
-                StartGetMetadata(serviceUrl, callbackPtr, userDataPtr);
+                var context = new AuthInterceptorContext(Marshal.PtrToStringAnsi(serviceUrlPtr),
+                                                         Marshal.PtrToStringAnsi(methodNamePtr));
+                StartGetMetadata(context, callbackPtr, userDataPtr);
             }
             catch (Exception e)
             {
@@ -91,12 +92,12 @@ namespace Grpc.Core.Internal
             }
         }
 
-        private async void StartGetMetadata(string serviceUrl, IntPtr callbackPtr, IntPtr userDataPtr)
+        private async void StartGetMetadata(AuthInterceptorContext context, IntPtr callbackPtr, IntPtr userDataPtr)
         {
             try
             {
                 var metadata = new Metadata();
-                await interceptor(serviceUrl, metadata).ConfigureAwait(false);
+                await interceptor(context, metadata).ConfigureAwait(false);
 
                 using (var metadataArray = MetadataArraySafeHandle.Create(metadata))
                 {
diff --git a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
index 3d56678b99..35230f48c1 100644
--- a/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
+++ b/src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs
@@ -67,7 +67,7 @@ namespace Grpc.IntegrationTesting
                 new ChannelOption(ChannelOptions.SslTargetNameOverride, TestCredentials.DefaultHostOverride)
             };
 
-            var asyncAuthInterceptor = new AsyncAuthInterceptor(async (authUri, metadata) =>
+            var asyncAuthInterceptor = new AsyncAuthInterceptor(async (context, metadata) =>
             {
                 await Task.Delay(100);  // make sure the operation is asynchronous.
                 metadata.Add("authorization", "SECRET_TOKEN");
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index b8705c49d3..0ef9be33a6 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -927,7 +927,8 @@ GPR_EXPORT void GPR_CALLTYPE grpcsharp_metadata_credentials_notify_from_plugin(
 }
 
 typedef void(GPR_CALLTYPE *grpcsharp_metadata_interceptor_func)(
-  void *state, const char *service_url, grpc_credentials_plugin_metadata_cb cb,
+  void *state, const char *service_url, const char *method_name,
+  grpc_credentials_plugin_metadata_cb cb,
   void *user_data, gpr_int32 is_destroy);
 
 static void grpcsharp_get_metadata_handler(
@@ -935,13 +936,13 @@ static void grpcsharp_get_metadata_handler(
     grpc_credentials_plugin_metadata_cb cb, void *user_data) {
   grpcsharp_metadata_interceptor_func interceptor =
       (grpcsharp_metadata_interceptor_func)(gpr_intptr)state;
-  interceptor(state, context.service_url, cb, user_data, 0);
+  interceptor(state, context.service_url, context.method_name, cb, user_data, 0);
 }
 
 static void grpcsharp_metadata_credentials_destroy_handler(void *state) {
   grpcsharp_metadata_interceptor_func interceptor =
       (grpcsharp_metadata_interceptor_func)(gpr_intptr)state;
-  interceptor(state, NULL, NULL, NULL, 1);
+  interceptor(state, NULL, NULL, NULL, NULL, 1);
 }
 
 GPR_EXPORT grpc_call_credentials *GPR_CALLTYPE grpcsharp_metadata_credentials_create_from_plugin(
diff --git a/src/node/ext/call.cc b/src/node/ext/call.cc
index 1b2ab21dfe..c0e2b0f0e8 100644
--- a/src/node/ext/call.cc
+++ b/src/node/ext/call.cc
@@ -234,7 +234,9 @@ class SendMetadataOp : public Op {
 
 class SendMessageOp : public Op {
  public:
-  SendMessageOp() { send_message = NULL; }
+  SendMessageOp() {
+    send_message = NULL;
+  }
   ~SendMessageOp() {
     if (send_message != NULL) {
       grpc_byte_buffer_destroy(send_message);
@@ -269,7 +271,6 @@ class SendMessageOp : public Op {
   std::string GetTypeString() const {
     return "send_message";
   }
-
  private:
   grpc_byte_buffer *send_message;
 };
diff --git a/src/node/src/credentials.js b/src/node/src/credentials.js
index ff10a22e6a..dcbfac18f4 100644
--- a/src/node/src/credentials.js
+++ b/src/node/src/credentials.js
@@ -91,7 +91,7 @@ exports.createSsl = ChannelCredentials.createSsl;
  */
 exports.createFromMetadataGenerator = function(metadata_generator) {
   return CallCredentials.createFromPlugin(function(service_url, callback) {
-    metadata_generator(service_url, function(error, metadata) {
+    metadata_generator({service_url: service_url}, function(error, metadata) {
       var code = grpc.status.OK;
       var message = '';
       if (error) {
@@ -114,7 +114,8 @@ exports.createFromMetadataGenerator = function(metadata_generator) {
  * @return {CallCredentials} The resulting credentials object
  */
 exports.createFromGoogleCredential = function(google_credential) {
-  return exports.createFromMetadataGenerator(function(service_url, callback) {
+  return exports.createFromMetadataGenerator(function(auth_context, callback) {
+    var service_url = auth_context.service_url;
     google_credential.getRequestMetadata(service_url, function(err, header) {
       if (err) {
         callback(err);
diff --git a/src/objective-c/BoringSSL.podspec b/src/objective-c/BoringSSL.podspec
new file mode 100644
index 0000000000..f5b738203d
--- /dev/null
+++ b/src/objective-c/BoringSSL.podspec
@@ -0,0 +1,1428 @@
+# BoringSSL CocoaPods podspec
+
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Pod::Spec.new do |s|
+  s.name     = 'BoringSSL'
+  s.version  = '1.0'
+  s.summary  = 'BoringSSL is a fork of OpenSSL that is designed to meet Google’s needs.'
+  # Adapted from the homepage:
+  s.description = <<-DESC
+    BoringSSL is a fork of OpenSSL that is designed to meet Google’s needs.
+
+    Although BoringSSL is an open source project, it is not intended for general use, as OpenSSL is.
+    We don’t recommend that third parties depend upon it. Doing so is likely to be frustrating
+    because there are no guarantees of API stability. Only the latest version of this pod is
+    supported, and every new version is a new major version.
+
+    We update Google libraries and programs that use BoringSSL as needed when deciding to make API
+    changes. This allows us to mostly avoid compromises in the name of compatibility. It works for
+    us, but it may not work for you.
+
+    As a Cocoapods pod, it has the advantage over OpenSSL's pods that the library doesn't need to
+    be precompiled. This eliminates the 10 - 20 minutes of wait the first time a user does "pod
+    install", lets it be used as a dynamic framework (pending solution of Cocoapods' issue #4605),
+    and works with bitcode automatically. It's also thought to be smaller than OpenSSL (which takes
+    1MB - 2MB per ARM architecture), but we don't have specific numbers yet.
+
+    BoringSSL arose because Google used OpenSSL for many years in various ways and, over time, built
+    up a large number of patches that were maintained while tracking upstream OpenSSL. As Google’s
+    product portfolio became more complex, more copies of OpenSSL sprung up and the effort involved
+    in maintaining all these patches in multiple places was growing steadily.
+
+    Currently BoringSSL is the SSL library in Chrome/Chromium, Android (but it’s not part of the
+    NDK) and a number of other apps/programs.
+  DESC
+  s.homepage = 'https://boringssl.googlesource.com/boringssl/'
+  s.documentation_url = 'https://commondatastorage.googleapis.com/chromium-boringssl-docs/headers.html'
+  s.license  = { :type => 'Mixed', :file => 'LICENSE' }
+  # "The name and email addresses of the library maintainers, not the Podspec maintainer."
+  s.authors  = 'Adam Langley', 'David Benjamin', 'Matt Braithwaite'
+
+  s.source = { :git => 'https://boringssl.googlesource.com/boringssl',
+               :tag => 'version_for_cocoapods_1.0' }
+
+  s.source_files = 'ssl/*.{h,c}',
+                   'ssl/**/*.{h,c}',
+                   '*.{h,c}',
+                   'crypto/*.{h,c}',
+                   'crypto/**/*.{h,c}',
+                   'include/openssl/*.h'
+
+  s.public_header_files = 'include/openssl/*.h'
+  s.header_mappings_dir = 'include'
+
+  s.exclude_files = "**/*_test.*"
+
+  # We don't need to inhibit all warnings; only -Wno-shorten-64-to-32. But Cocoapods' linter doesn't
+  # want that for some reason.
+  s.compiler_flags = '-DOPENSSL_NO_ASM', '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
+  s.requires_arc = false
+
+  s.prepare_command = <<-END_OF_COMMAND
+    # Replace "const BIGNUM *I" in rsa.h with a lowercase i, as the former fails when including
+    # OpenSSL in a Swift bridging header (complex.h defines "I", and it's as if the compiler
+    # included it in every bridged header).
+    sed -E -i '.back' 's/\\*I,/*i,/g' include/openssl/rsa.h
+
+    # This is a bit ridiculous, but requiring people to install Go in order to build is slightly
+    # more ridiculous IMO. To save you from scrolling, this is the last part of the podspec.
+    # TODO(jcanizales): Translate err_data_generate.go into a Bash or Ruby script.
+    cat > err_data.c <<EOF
+      /* Copyright (c) 2015, Google Inc.
+       *
+       * Permission to use, copy, modify, and/or distribute this software for any
+       * purpose with or without fee is hereby granted, provided that the above
+       * copyright notice and this permission notice appear in all copies.
+       *
+       * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+       * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+       * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+       * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+       * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+       * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+       * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+       /* This file was generated by err_data_generate.go. */
+
+      #include <openssl/base.h>
+      #include <openssl/err.h>
+      #include <openssl/type_check.h>
+
+
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_NONE == 1, library_values_changed_1);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_SYS == 2, library_values_changed_2);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_BN == 3, library_values_changed_3);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_RSA == 4, library_values_changed_4);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_DH == 5, library_values_changed_5);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_EVP == 6, library_values_changed_6);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_BUF == 7, library_values_changed_7);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_OBJ == 8, library_values_changed_8);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_PEM == 9, library_values_changed_9);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_DSA == 10, library_values_changed_10);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_X509 == 11, library_values_changed_11);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_ASN1 == 12, library_values_changed_12);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_CONF == 13, library_values_changed_13);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_CRYPTO == 14, library_values_changed_14);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_EC == 15, library_values_changed_15);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_SSL == 16, library_values_changed_16);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_BIO == 17, library_values_changed_17);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_PKCS7 == 18, library_values_changed_18);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_PKCS8 == 19, library_values_changed_19);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_X509V3 == 20, library_values_changed_20);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_RAND == 21, library_values_changed_21);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_ENGINE == 22, library_values_changed_22);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_OCSP == 23, library_values_changed_23);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_UI == 24, library_values_changed_24);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_COMP == 25, library_values_changed_25);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_ECDSA == 26, library_values_changed_26);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_ECDH == 27, library_values_changed_27);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_HMAC == 28, library_values_changed_28);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_DIGEST == 29, library_values_changed_29);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_CIPHER == 30, library_values_changed_30);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_HKDF == 31, library_values_changed_31);
+      OPENSSL_COMPILE_ASSERT(ERR_LIB_USER == 32, library_values_changed_32);
+      OPENSSL_COMPILE_ASSERT(ERR_NUM_LIBS == 33, library_values_changed_num);
+
+      const uint32_t kOpenSSLReasonValues[] = {
+          0xc3207ba,
+          0xc3287d4,
+          0xc3307e3,
+          0xc3387f3,
+          0xc340802,
+          0xc34881b,
+          0xc350827,
+          0xc358844,
+          0xc360856,
+          0xc368864,
+          0xc370874,
+          0xc378881,
+          0xc380891,
+          0xc38889c,
+          0xc3908b2,
+          0xc3988c1,
+          0xc3a08d5,
+          0xc3a87c7,
+          0xc3b00b0,
+          0x10321478,
+          0x10329484,
+          0x1033149d,
+          0x103394b0,
+          0x10340de1,
+          0x103494cf,
+          0x103514e4,
+          0x10359516,
+          0x1036152f,
+          0x10369544,
+          0x10371562,
+          0x10379571,
+          0x1038158d,
+          0x103895a8,
+          0x103915b7,
+          0x103995d3,
+          0x103a15ee,
+          0x103a9605,
+          0x103b1616,
+          0x103b962a,
+          0x103c1649,
+          0x103c9658,
+          0x103d166f,
+          0x103d9682,
+          0x103e0b6c,
+          0x103e96b3,
+          0x103f16c6,
+          0x103f96e0,
+          0x104016f0,
+          0x10409704,
+          0x1041171a,
+          0x10419732,
+          0x10421747,
+          0x1042975b,
+          0x1043176d,
+          0x104385d0,
+          0x104408c1,
+          0x10449782,
+          0x10451799,
+          0x104597ae,
+          0x104617bc,
+          0x10469695,
+          0x104714f7,
+          0x104787c7,
+          0x104800b0,
+          0x104894c3,
+          0x14320b4f,
+          0x14328b5d,
+          0x14330b6c,
+          0x14338b7e,
+          0x18320083,
+          0x18328e47,
+          0x18340e75,
+          0x18348e89,
+          0x18358ec0,
+          0x18368eed,
+          0x18370f00,
+          0x18378f14,
+          0x18380f38,
+          0x18388f46,
+          0x18390f5c,
+          0x18398f70,
+          0x183a0f80,
+          0x183b0f90,
+          0x183b8fa5,
+          0x183c8fd0,
+          0x183d0fe4,
+          0x183d8ff4,
+          0x183e0b9b,
+          0x183e9001,
+          0x183f1013,
+          0x183f901e,
+          0x1840102e,
+          0x1840903f,
+          0x18411050,
+          0x18419062,
+          0x1842108b,
+          0x184290bd,
+          0x184310cc,
+          0x18451135,
+          0x1845914b,
+          0x18461166,
+          0x18468ed8,
+          0x184709d9,
+          0x18478094,
+          0x18480fbc,
+          0x18489101,
+          0x18490e5d,
+          0x18498e9e,
+          0x184a119c,
+          0x184a9119,
+          0x184b10e0,
+          0x184b8e37,
+          0x184c10a4,
+          0x184c866b,
+          0x184d1181,
+          0x203211c3,
+          0x243211cf,
+          0x24328907,
+          0x243311e1,
+          0x243391ee,
+          0x243411fb,
+          0x2434920d,
+          0x2435121c,
+          0x24359239,
+          0x24361246,
+          0x24369254,
+          0x24371262,
+          0x24379270,
+          0x24381279,
+          0x24389286,
+          0x24391299,
+          0x28320b8f,
+          0x28328b9b,
+          0x28330b6c,
+          0x28338bae,
+          0x2c322c0b,
+          0x2c32ac19,
+          0x2c332c2b,
+          0x2c33ac3d,
+          0x2c342c51,
+          0x2c34ac63,
+          0x2c352c7e,
+          0x2c35ac90,
+          0x2c362ca3,
+          0x2c3682f3,
+          0x2c372cb0,
+          0x2c37acc2,
+          0x2c382cd5,
+          0x2c38ace3,
+          0x2c392cf3,
+          0x2c39ad05,
+          0x2c3a2d19,
+          0x2c3aad2a,
+          0x2c3b1359,
+          0x2c3bad3b,
+          0x2c3c2d4f,
+          0x2c3cad65,
+          0x2c3d2d7e,
+          0x2c3dadac,
+          0x2c3e2dba,
+          0x2c3eadd2,
+          0x2c3f2dea,
+          0x2c3fadf7,
+          0x2c402e1a,
+          0x2c40ae39,
+          0x2c4111c3,
+          0x2c41ae4a,
+          0x2c422e5d,
+          0x2c429135,
+          0x2c432e6e,
+          0x2c4386a2,
+          0x2c442d9b,
+          0x30320000,
+          0x30328015,
+          0x3033001f,
+          0x30338038,
+          0x3034004a,
+          0x30348064,
+          0x3035006b,
+          0x30358083,
+          0x30360094,
+          0x303680a1,
+          0x303700b0,
+          0x303780bd,
+          0x303800d0,
+          0x303880eb,
+          0x30390100,
+          0x30398114,
+          0x303a0128,
+          0x303a8139,
+          0x303b0152,
+          0x303b816f,
+          0x303c017d,
+          0x303c8191,
+          0x303d01a1,
+          0x303d81ba,
+          0x303e01ca,
+          0x303e81dd,
+          0x303f01ec,
+          0x303f81f8,
+          0x3040020d,
+          0x3040821d,
+          0x30410234,
+          0x30418241,
+          0x30420254,
+          0x30428263,
+          0x30430278,
+          0x30438299,
+          0x304402ac,
+          0x304482bf,
+          0x304502d8,
+          0x304582f3,
+          0x30460310,
+          0x30468329,
+          0x30470337,
+          0x30478348,
+          0x30480357,
+          0x3048836f,
+          0x30490381,
+          0x30498395,
+          0x304a03b4,
+          0x304a83c7,
+          0x304b03d2,
+          0x304b83e1,
+          0x304c03f2,
+          0x304c83fe,
+          0x304d0414,
+          0x304d8422,
+          0x304e0438,
+          0x304e844a,
+          0x304f045c,
+          0x304f846f,
+          0x30500482,
+          0x30508493,
+          0x305104a3,
+          0x305184bb,
+          0x305204d0,
+          0x305284e8,
+          0x305304fc,
+          0x30538514,
+          0x3054052d,
+          0x30548546,
+          0x30550563,
+          0x3055856e,
+          0x30560586,
+          0x30568596,
+          0x305705a7,
+          0x305785ba,
+          0x305805d0,
+          0x305885d9,
+          0x305905ee,
+          0x30598601,
+          0x305a0610,
+          0x305a8630,
+          0x305b063f,
+          0x305b864b,
+          0x305c066b,
+          0x305c8687,
+          0x305d0698,
+          0x305d86a2,
+          0x34320ac9,
+          0x34328add,
+          0x34330afa,
+          0x34338b0d,
+          0x34340b1c,
+          0x34348b39,
+          0x3c320083,
+          0x3c328bd8,
+          0x3c330bf1,
+          0x3c338c0c,
+          0x3c340c29,
+          0x3c348c44,
+          0x3c350c5f,
+          0x3c358c74,
+          0x3c360c8d,
+          0x3c368ca5,
+          0x3c370cb6,
+          0x3c378cc4,
+          0x3c380cd1,
+          0x3c388ce5,
+          0x3c390b9b,
+          0x3c398cf9,
+          0x3c3a0d0d,
+          0x3c3a8881,
+          0x3c3b0d1d,
+          0x3c3b8d38,
+          0x3c3c0d4a,
+          0x3c3c8d60,
+          0x3c3d0d6a,
+          0x3c3d8d7e,
+          0x3c3e0d8c,
+          0x3c3e8db1,
+          0x3c3f0bc4,
+          0x3c3f8d9a,
+          0x403217d3,
+          0x403297e9,
+          0x40331817,
+          0x40339821,
+          0x40341838,
+          0x40349856,
+          0x40351866,
+          0x40359878,
+          0x40361885,
+          0x40369891,
+          0x403718a6,
+          0x403798bb,
+          0x403818cd,
+          0x403898d8,
+          0x403918ea,
+          0x40398de1,
+          0x403a18fa,
+          0x403a990d,
+          0x403b192e,
+          0x403b993f,
+          0x403c194f,
+          0x403c8064,
+          0x403d195b,
+          0x403d9977,
+          0x403e198d,
+          0x403e999c,
+          0x403f19af,
+          0x403f99c9,
+          0x404019d7,
+          0x404099ec,
+          0x40411a00,
+          0x40419a1d,
+          0x40421a36,
+          0x40429a51,
+          0x40431a6a,
+          0x40439a7d,
+          0x40441a91,
+          0x40449aa9,
+          0x40451af4,
+          0x40459b02,
+          0x40461b20,
+          0x40468094,
+          0x40471b35,
+          0x40479b47,
+          0x40481b6b,
+          0x40489b99,
+          0x40491bad,
+          0x40499bc2,
+          0x404a1bdb,
+          0x404a9c15,
+          0x404b1c46,
+          0x404b9c7c,
+          0x404c1c97,
+          0x404c9cb1,
+          0x404d1cc8,
+          0x404d9cf0,
+          0x404e1d07,
+          0x404e9d23,
+          0x404f1d3f,
+          0x404f9d60,
+          0x40501d82,
+          0x40509d9e,
+          0x40511db2,
+          0x40519dbf,
+          0x40521dd6,
+          0x40529de6,
+          0x40531df6,
+          0x40539e0a,
+          0x40541e25,
+          0x40549e35,
+          0x40551e4c,
+          0x40559e5b,
+          0x40561e88,
+          0x40569ea0,
+          0x40571ebc,
+          0x40579ed5,
+          0x40581ee8,
+          0x40589efd,
+          0x40591f20,
+          0x40599f4b,
+          0x405a1f58,
+          0x405a9f71,
+          0x405b1f89,
+          0x405b9f9c,
+          0x405c1fb1,
+          0x405c9fc3,
+          0x405d1fd8,
+          0x405d9fe8,
+          0x405e2001,
+          0x405ea015,
+          0x405f2025,
+          0x405fa03d,
+          0x4060204e,
+          0x4060a061,
+          0x40612072,
+          0x4061a090,
+          0x406220a1,
+          0x4062a0ae,
+          0x406320c5,
+          0x4063a106,
+          0x4064211d,
+          0x4064a12a,
+          0x40652138,
+          0x4065a15a,
+          0x40662182,
+          0x4066a197,
+          0x406721ae,
+          0x4067a1bf,
+          0x406821d0,
+          0x4068a1e1,
+          0x406921f6,
+          0x4069a20d,
+          0x406a221e,
+          0x406aa237,
+          0x406b2252,
+          0x406ba269,
+          0x406c22d6,
+          0x406ca2f7,
+          0x406d230a,
+          0x406da32b,
+          0x406e2346,
+          0x406ea38f,
+          0x406f23b0,
+          0x406fa3d6,
+          0x407023f6,
+          0x4070a412,
+          0x4071259f,
+          0x4071a5c2,
+          0x407225d8,
+          0x4072a5f7,
+          0x4073260f,
+          0x4073a62f,
+          0x40742859,
+          0x4074a87e,
+          0x40752899,
+          0x4075a8b8,
+          0x407628e7,
+          0x4076a90f,
+          0x40772940,
+          0x4077a95f,
+          0x40782999,
+          0x4078a9b0,
+          0x407929c3,
+          0x4079a9e0,
+          0x407a0782,
+          0x407aa9f2,
+          0x407b2a05,
+          0x407baa1e,
+          0x407c2a36,
+          0x407c90bd,
+          0x407d2a4a,
+          0x407daa64,
+          0x407e2a75,
+          0x407eaa89,
+          0x407f2a97,
+          0x407faab2,
+          0x40801286,
+          0x4080aad7,
+          0x40812af9,
+          0x4081ab14,
+          0x40822b29,
+          0x4082ab41,
+          0x40832b59,
+          0x4083ab70,
+          0x40842b86,
+          0x4084ab92,
+          0x40852ba5,
+          0x4085abba,
+          0x40862bcc,
+          0x4086abe1,
+          0x40872bea,
+          0x40879cde,
+          0x40880083,
+          0x4088a0e5,
+          0x40890a17,
+          0x4089a281,
+          0x408a1bfe,
+          0x408aa2ab,
+          0x408b2928,
+          0x408ba984,
+          0x408c2361,
+          0x408c9c2f,
+          0x408d1c64,
+          0x408d9e76,
+          0x408e1ab9,
+          0x408e9add,
+          0x408f1f2e,
+          0x408f9b8b,
+          0x41f424ca,
+          0x41f9255c,
+          0x41fe244f,
+          0x41fea680,
+          0x41ff2771,
+          0x420324e3,
+          0x42082505,
+          0x4208a541,
+          0x42092433,
+          0x4209a57b,
+          0x420a248a,
+          0x420aa46a,
+          0x420b24aa,
+          0x420ba523,
+          0x420c278d,
+          0x420ca64d,
+          0x420d2667,
+          0x420da69e,
+          0x421226b8,
+          0x42172754,
+          0x4217a6fa,
+          0x421c271c,
+          0x421f26d7,
+          0x422127a4,
+          0x42262737,
+          0x422b283d,
+          0x422ba806,
+          0x422c2825,
+          0x422ca7e0,
+          0x422d27bf,
+          0x443206ad,
+          0x443286bc,
+          0x443306c8,
+          0x443386d6,
+          0x443406e9,
+          0x443486fa,
+          0x44350701,
+          0x4435870b,
+          0x4436071e,
+          0x44368734,
+          0x44370746,
+          0x44378753,
+          0x44380762,
+          0x4438876a,
+          0x44390782,
+          0x44398790,
+          0x443a07a3,
+          0x4c3212b0,
+          0x4c3292c0,
+          0x4c3312d3,
+          0x4c3392f3,
+          0x4c340094,
+          0x4c3480b0,
+          0x4c3512ff,
+          0x4c35930d,
+          0x4c361329,
+          0x4c36933c,
+          0x4c37134b,
+          0x4c379359,
+          0x4c38136e,
+          0x4c38937a,
+          0x4c39139a,
+          0x4c3993c4,
+          0x4c3a13dd,
+          0x4c3a93f6,
+          0x4c3b05d0,
+          0x4c3b940f,
+          0x4c3c1421,
+          0x4c3c9430,
+          0x4c3d10bd,
+          0x4c3d9449,
+          0x4c3e1456,
+          0x50322e80,
+          0x5032ae8f,
+          0x50332e9a,
+          0x5033aeaa,
+          0x50342ec3,
+          0x5034aedd,
+          0x50352eeb,
+          0x5035af01,
+          0x50362f13,
+          0x5036af29,
+          0x50372f42,
+          0x5037af55,
+          0x50382f6d,
+          0x5038af7e,
+          0x50392f93,
+          0x5039afa7,
+          0x503a2fc7,
+          0x503aafdd,
+          0x503b2ff5,
+          0x503bb007,
+          0x503c3023,
+          0x503cb03a,
+          0x503d3053,
+          0x503db069,
+          0x503e3076,
+          0x503eb08c,
+          0x503f309e,
+          0x503f8348,
+          0x504030b1,
+          0x5040b0c1,
+          0x504130db,
+          0x5041b0ea,
+          0x50423104,
+          0x5042b121,
+          0x50433131,
+          0x5043b141,
+          0x50443150,
+          0x50448414,
+          0x50453164,
+          0x5045b182,
+          0x50463195,
+          0x5046b1ab,
+          0x504731bd,
+          0x5047b1d2,
+          0x504831f8,
+          0x5048b206,
+          0x50493219,
+          0x5049b22e,
+          0x504a3244,
+          0x504ab254,
+          0x504b3274,
+          0x504bb287,
+          0x504c32aa,
+          0x504cb2d8,
+          0x504d32ea,
+          0x504db307,
+          0x504e3322,
+          0x504eb33e,
+          0x504f3350,
+          0x504fb367,
+          0x50503376,
+          0x50508687,
+          0x50513389,
+          0x58320e1f,
+          0x68320de1,
+          0x68328b9b,
+          0x68330bae,
+          0x68338def,
+          0x68340dff,
+          0x683480b0,
+          0x6c320dbd,
+          0x6c328b7e,
+          0x6c330dc8,
+          0x7432098d,
+          0x783208f2,
+          0x78328907,
+          0x78330913,
+          0x78338083,
+          0x78340922,
+          0x78348937,
+          0x78350956,
+          0x78358978,
+          0x7836098d,
+          0x783689a3,
+          0x783709b3,
+          0x783789c6,
+          0x783809d9,
+          0x783889eb,
+          0x783909f8,
+          0x78398a17,
+          0x783a0a2c,
+          0x783a8a3a,
+          0x783b0a44,
+          0x783b8a58,
+          0x783c0a6f,
+          0x783c8a84,
+          0x783d0a9b,
+          0x783d8ab0,
+          0x783e0a06,
+          0x7c3211b2,
+      };
+
+      const size_t kOpenSSLReasonValuesLen = sizeof(kOpenSSLReasonValues) / sizeof(kOpenSSLReasonValues[0]);
+
+      const char kOpenSSLReasonStringData[] =
+          "ASN1_LENGTH_MISMATCH\\0"
+          "AUX_ERROR\\0"
+          "BAD_GET_ASN1_OBJECT_CALL\\0"
+          "BAD_OBJECT_HEADER\\0"
+          "BMPSTRING_IS_WRONG_LENGTH\\0"
+          "BN_LIB\\0"
+          "BOOLEAN_IS_WRONG_LENGTH\\0"
+          "BUFFER_TOO_SMALL\\0"
+          "DECODE_ERROR\\0"
+          "DEPTH_EXCEEDED\\0"
+          "ENCODE_ERROR\\0"
+          "ERROR_GETTING_TIME\\0"
+          "EXPECTING_AN_ASN1_SEQUENCE\\0"
+          "EXPECTING_AN_INTEGER\\0"
+          "EXPECTING_AN_OBJECT\\0"
+          "EXPECTING_A_BOOLEAN\\0"
+          "EXPECTING_A_TIME\\0"
+          "EXPLICIT_LENGTH_MISMATCH\\0"
+          "EXPLICIT_TAG_NOT_CONSTRUCTED\\0"
+          "FIELD_MISSING\\0"
+          "FIRST_NUM_TOO_LARGE\\0"
+          "HEADER_TOO_LONG\\0"
+          "ILLEGAL_BITSTRING_FORMAT\\0"
+          "ILLEGAL_BOOLEAN\\0"
+          "ILLEGAL_CHARACTERS\\0"
+          "ILLEGAL_FORMAT\\0"
+          "ILLEGAL_HEX\\0"
+          "ILLEGAL_IMPLICIT_TAG\\0"
+          "ILLEGAL_INTEGER\\0"
+          "ILLEGAL_NESTED_TAGGING\\0"
+          "ILLEGAL_NULL\\0"
+          "ILLEGAL_NULL_VALUE\\0"
+          "ILLEGAL_OBJECT\\0"
+          "ILLEGAL_OPTIONAL_ANY\\0"
+          "ILLEGAL_OPTIONS_ON_ITEM_TEMPLATE\\0"
+          "ILLEGAL_TAGGED_ANY\\0"
+          "ILLEGAL_TIME_VALUE\\0"
+          "INTEGER_NOT_ASCII_FORMAT\\0"
+          "INTEGER_TOO_LARGE_FOR_LONG\\0"
+          "INVALID_BIT_STRING_BITS_LEFT\\0"
+          "INVALID_BMPSTRING_LENGTH\\0"
+          "INVALID_DIGIT\\0"
+          "INVALID_MODIFIER\\0"
+          "INVALID_NUMBER\\0"
+          "INVALID_OBJECT_ENCODING\\0"
+          "INVALID_SEPARATOR\\0"
+          "INVALID_TIME_FORMAT\\0"
+          "INVALID_UNIVERSALSTRING_LENGTH\\0"
+          "INVALID_UTF8STRING\\0"
+          "LIST_ERROR\\0"
+          "MALLOC_FAILURE\\0"
+          "MISSING_ASN1_EOS\\0"
+          "MISSING_EOC\\0"
+          "MISSING_SECOND_NUMBER\\0"
+          "MISSING_VALUE\\0"
+          "MSTRING_NOT_UNIVERSAL\\0"
+          "MSTRING_WRONG_TAG\\0"
+          "NESTED_ASN1_ERROR\\0"
+          "NESTED_ASN1_STRING\\0"
+          "NON_HEX_CHARACTERS\\0"
+          "NOT_ASCII_FORMAT\\0"
+          "NOT_ENOUGH_DATA\\0"
+          "NO_MATCHING_CHOICE_TYPE\\0"
+          "NULL_IS_WRONG_LENGTH\\0"
+          "OBJECT_NOT_ASCII_FORMAT\\0"
+          "ODD_NUMBER_OF_CHARS\\0"
+          "SECOND_NUMBER_TOO_LARGE\\0"
+          "SEQUENCE_LENGTH_MISMATCH\\0"
+          "SEQUENCE_NOT_CONSTRUCTED\\0"
+          "SEQUENCE_OR_SET_NEEDS_CONFIG\\0"
+          "SHORT_LINE\\0"
+          "STREAMING_NOT_SUPPORTED\\0"
+          "STRING_TOO_LONG\\0"
+          "STRING_TOO_SHORT\\0"
+          "TAG_VALUE_TOO_HIGH\\0"
+          "TIME_NOT_ASCII_FORMAT\\0"
+          "TOO_LONG\\0"
+          "TYPE_NOT_CONSTRUCTED\\0"
+          "TYPE_NOT_PRIMITIVE\\0"
+          "UNEXPECTED_EOC\\0"
+          "UNIVERSALSTRING_IS_WRONG_LENGTH\\0"
+          "UNKNOWN_FORMAT\\0"
+          "UNKNOWN_TAG\\0"
+          "UNSUPPORTED_ANY_DEFINED_BY_TYPE\\0"
+          "UNSUPPORTED_PUBLIC_KEY_TYPE\\0"
+          "UNSUPPORTED_TYPE\\0"
+          "WRONG_TAG\\0"
+          "WRONG_TYPE\\0"
+          "BAD_FOPEN_MODE\\0"
+          "BROKEN_PIPE\\0"
+          "CONNECT_ERROR\\0"
+          "ERROR_SETTING_NBIO\\0"
+          "INVALID_ARGUMENT\\0"
+          "IN_USE\\0"
+          "KEEPALIVE\\0"
+          "NBIO_CONNECT_ERROR\\0"
+          "NO_HOSTNAME_SPECIFIED\\0"
+          "NO_PORT_SPECIFIED\\0"
+          "NO_SUCH_FILE\\0"
+          "NULL_PARAMETER\\0"
+          "SYS_LIB\\0"
+          "UNABLE_TO_CREATE_SOCKET\\0"
+          "UNINITIALIZED\\0"
+          "UNSUPPORTED_METHOD\\0"
+          "WRITE_TO_READ_ONLY_BIO\\0"
+          "ARG2_LT_ARG3\\0"
+          "BAD_ENCODING\\0"
+          "BAD_RECIPROCAL\\0"
+          "BIGNUM_TOO_LONG\\0"
+          "BITS_TOO_SMALL\\0"
+          "CALLED_WITH_EVEN_MODULUS\\0"
+          "DIV_BY_ZERO\\0"
+          "EXPAND_ON_STATIC_BIGNUM_DATA\\0"
+          "INPUT_NOT_REDUCED\\0"
+          "INVALID_RANGE\\0"
+          "NEGATIVE_NUMBER\\0"
+          "NOT_A_SQUARE\\0"
+          "NOT_INITIALIZED\\0"
+          "NO_INVERSE\\0"
+          "PRIVATE_KEY_TOO_LARGE\\0"
+          "P_IS_NOT_PRIME\\0"
+          "TOO_MANY_ITERATIONS\\0"
+          "TOO_MANY_TEMPORARY_VARIABLES\\0"
+          "AES_KEY_SETUP_FAILED\\0"
+          "BAD_DECRYPT\\0"
+          "BAD_KEY_LENGTH\\0"
+          "CTRL_NOT_IMPLEMENTED\\0"
+          "CTRL_OPERATION_NOT_IMPLEMENTED\\0"
+          "DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH\\0"
+          "INITIALIZATION_ERROR\\0"
+          "INPUT_NOT_INITIALIZED\\0"
+          "INVALID_AD_SIZE\\0"
+          "INVALID_KEY_LENGTH\\0"
+          "INVALID_NONCE_SIZE\\0"
+          "INVALID_OPERATION\\0"
+          "IV_TOO_LARGE\\0"
+          "NO_CIPHER_SET\\0"
+          "NO_DIRECTION_SET\\0"
+          "OUTPUT_ALIASES_INPUT\\0"
+          "TAG_TOO_LARGE\\0"
+          "TOO_LARGE\\0"
+          "UNSUPPORTED_AD_SIZE\\0"
+          "UNSUPPORTED_INPUT_SIZE\\0"
+          "UNSUPPORTED_KEY_SIZE\\0"
+          "UNSUPPORTED_NONCE_SIZE\\0"
+          "UNSUPPORTED_TAG_SIZE\\0"
+          "WRONG_FINAL_BLOCK_LENGTH\\0"
+          "LIST_CANNOT_BE_NULL\\0"
+          "MISSING_CLOSE_SQUARE_BRACKET\\0"
+          "MISSING_EQUAL_SIGN\\0"
+          "NO_CLOSE_BRACE\\0"
+          "UNABLE_TO_CREATE_NEW_SECTION\\0"
+          "VARIABLE_HAS_NO_VALUE\\0"
+          "BAD_GENERATOR\\0"
+          "INVALID_PUBKEY\\0"
+          "MODULUS_TOO_LARGE\\0"
+          "NO_PRIVATE_VALUE\\0"
+          "BAD_Q_VALUE\\0"
+          "MISSING_PARAMETERS\\0"
+          "NEED_NEW_SETUP_VALUES\\0"
+          "BIGNUM_OUT_OF_RANGE\\0"
+          "COORDINATES_OUT_OF_RANGE\\0"
+          "D2I_ECPKPARAMETERS_FAILURE\\0"
+          "EC_GROUP_NEW_BY_NAME_FAILURE\\0"
+          "GROUP2PKPARAMETERS_FAILURE\\0"
+          "I2D_ECPKPARAMETERS_FAILURE\\0"
+          "INCOMPATIBLE_OBJECTS\\0"
+          "INVALID_COMPRESSED_POINT\\0"
+          "INVALID_COMPRESSION_BIT\\0"
+          "INVALID_ENCODING\\0"
+          "INVALID_FIELD\\0"
+          "INVALID_FORM\\0"
+          "INVALID_GROUP_ORDER\\0"
+          "INVALID_PRIVATE_KEY\\0"
+          "MISSING_PRIVATE_KEY\\0"
+          "NON_NAMED_CURVE\\0"
+          "PKPARAMETERS2GROUP_FAILURE\\0"
+          "POINT_AT_INFINITY\\0"
+          "POINT_IS_NOT_ON_CURVE\\0"
+          "SLOT_FULL\\0"
+          "UNDEFINED_GENERATOR\\0"
+          "UNKNOWN_GROUP\\0"
+          "UNKNOWN_ORDER\\0"
+          "WRONG_CURVE_PARAMETERS\\0"
+          "WRONG_ORDER\\0"
+          "KDF_FAILED\\0"
+          "POINT_ARITHMETIC_FAILURE\\0"
+          "BAD_SIGNATURE\\0"
+          "NOT_IMPLEMENTED\\0"
+          "RANDOM_NUMBER_GENERATION_FAILED\\0"
+          "OPERATION_NOT_SUPPORTED\\0"
+          "BN_DECODE_ERROR\\0"
+          "COMMAND_NOT_SUPPORTED\\0"
+          "CONTEXT_NOT_INITIALISED\\0"
+          "DIFFERENT_KEY_TYPES\\0"
+          "DIFFERENT_PARAMETERS\\0"
+          "DIGEST_AND_KEY_TYPE_NOT_SUPPORTED\\0"
+          "EXPECTING_AN_EC_KEY_KEY\\0"
+          "EXPECTING_AN_RSA_KEY\\0"
+          "EXPECTING_A_DH_KEY\\0"
+          "EXPECTING_A_DSA_KEY\\0"
+          "ILLEGAL_OR_UNSUPPORTED_PADDING_MODE\\0"
+          "INVALID_CURVE\\0"
+          "INVALID_DIGEST_LENGTH\\0"
+          "INVALID_DIGEST_TYPE\\0"
+          "INVALID_KEYBITS\\0"
+          "INVALID_MGF1_MD\\0"
+          "INVALID_PADDING_MODE\\0"
+          "INVALID_PSS_PARAMETERS\\0"
+          "INVALID_PSS_SALTLEN\\0"
+          "INVALID_SALT_LENGTH\\0"
+          "INVALID_TRAILER\\0"
+          "KEYS_NOT_SET\\0"
+          "NO_DEFAULT_DIGEST\\0"
+          "NO_KEY_SET\\0"
+          "NO_MDC2_SUPPORT\\0"
+          "NO_NID_FOR_CURVE\\0"
+          "NO_OPERATION_SET\\0"
+          "NO_PARAMETERS_SET\\0"
+          "OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE\\0"
+          "OPERATON_NOT_INITIALIZED\\0"
+          "PARAMETER_ENCODING_ERROR\\0"
+          "UNKNOWN_DIGEST\\0"
+          "UNKNOWN_MASK_DIGEST\\0"
+          "UNKNOWN_MESSAGE_DIGEST_ALGORITHM\\0"
+          "UNKNOWN_PUBLIC_KEY_TYPE\\0"
+          "UNKNOWN_SIGNATURE_ALGORITHM\\0"
+          "UNSUPPORTED_ALGORITHM\\0"
+          "UNSUPPORTED_MASK_ALGORITHM\\0"
+          "UNSUPPORTED_MASK_PARAMETER\\0"
+          "UNSUPPORTED_SIGNATURE_TYPE\\0"
+          "WRONG_PUBLIC_KEY_TYPE\\0"
+          "OUTPUT_TOO_LARGE\\0"
+          "UNKNOWN_NID\\0"
+          "BAD_BASE64_DECODE\\0"
+          "BAD_END_LINE\\0"
+          "BAD_IV_CHARS\\0"
+          "BAD_PASSWORD_READ\\0"
+          "CIPHER_IS_NULL\\0"
+          "ERROR_CONVERTING_PRIVATE_KEY\\0"
+          "NOT_DEK_INFO\\0"
+          "NOT_ENCRYPTED\\0"
+          "NOT_PROC_TYPE\\0"
+          "NO_START_LINE\\0"
+          "READ_KEY\\0"
+          "SHORT_HEADER\\0"
+          "UNSUPPORTED_CIPHER\\0"
+          "UNSUPPORTED_ENCRYPTION\\0"
+          "BAD_PKCS12_DATA\\0"
+          "BAD_PKCS12_VERSION\\0"
+          "CIPHER_HAS_NO_OBJECT_IDENTIFIER\\0"
+          "CRYPT_ERROR\\0"
+          "ENCRYPT_ERROR\\0"
+          "ERROR_SETTING_CIPHER_PARAMS\\0"
+          "INCORRECT_PASSWORD\\0"
+          "KEYGEN_FAILURE\\0"
+          "KEY_GEN_ERROR\\0"
+          "METHOD_NOT_SUPPORTED\\0"
+          "MISSING_MAC\\0"
+          "MULTIPLE_PRIVATE_KEYS_IN_PKCS12\\0"
+          "PKCS12_PUBLIC_KEY_INTEGRITY_NOT_SUPPORTED\\0"
+          "PKCS12_TOO_DEEPLY_NESTED\\0"
+          "PRIVATE_KEY_DECODE_ERROR\\0"
+          "PRIVATE_KEY_ENCODE_ERROR\\0"
+          "UNKNOWN_ALGORITHM\\0"
+          "UNKNOWN_CIPHER\\0"
+          "UNKNOWN_CIPHER_ALGORITHM\\0"
+          "UNKNOWN_HASH\\0"
+          "UNSUPPORTED_PRIVATE_KEY_ALGORITHM\\0"
+          "BAD_E_VALUE\\0"
+          "BAD_FIXED_HEADER_DECRYPT\\0"
+          "BAD_PAD_BYTE_COUNT\\0"
+          "BAD_RSA_PARAMETERS\\0"
+          "BAD_VERSION\\0"
+          "BLOCK_TYPE_IS_NOT_01\\0"
+          "BN_NOT_INITIALIZED\\0"
+          "CANNOT_RECOVER_MULTI_PRIME_KEY\\0"
+          "CRT_PARAMS_ALREADY_GIVEN\\0"
+          "CRT_VALUES_INCORRECT\\0"
+          "DATA_LEN_NOT_EQUAL_TO_MOD_LEN\\0"
+          "DATA_TOO_LARGE\\0"
+          "DATA_TOO_LARGE_FOR_KEY_SIZE\\0"
+          "DATA_TOO_LARGE_FOR_MODULUS\\0"
+          "DATA_TOO_SMALL\\0"
+          "DATA_TOO_SMALL_FOR_KEY_SIZE\\0"
+          "DIGEST_TOO_BIG_FOR_RSA_KEY\\0"
+          "D_E_NOT_CONGRUENT_TO_1\\0"
+          "EMPTY_PUBLIC_KEY\\0"
+          "FIRST_OCTET_INVALID\\0"
+          "INCONSISTENT_SET_OF_CRT_VALUES\\0"
+          "INTERNAL_ERROR\\0"
+          "INVALID_MESSAGE_LENGTH\\0"
+          "KEY_SIZE_TOO_SMALL\\0"
+          "LAST_OCTET_INVALID\\0"
+          "MUST_HAVE_AT_LEAST_TWO_PRIMES\\0"
+          "NO_PUBLIC_EXPONENT\\0"
+          "NULL_BEFORE_BLOCK_MISSING\\0"
+          "N_NOT_EQUAL_P_Q\\0"
+          "OAEP_DECODING_ERROR\\0"
+          "ONLY_ONE_OF_P_Q_GIVEN\\0"
+          "OUTPUT_BUFFER_TOO_SMALL\\0"
+          "PADDING_CHECK_FAILED\\0"
+          "PKCS_DECODING_ERROR\\0"
+          "SLEN_CHECK_FAILED\\0"
+          "SLEN_RECOVERY_FAILED\\0"
+          "UNKNOWN_ALGORITHM_TYPE\\0"
+          "UNKNOWN_PADDING_TYPE\\0"
+          "VALUE_MISSING\\0"
+          "WRONG_SIGNATURE_LENGTH\\0"
+          "APP_DATA_IN_HANDSHAKE\\0"
+          "ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT\\0"
+          "BAD_ALERT\\0"
+          "BAD_CHANGE_CIPHER_SPEC\\0"
+          "BAD_DATA_RETURNED_BY_CALLBACK\\0"
+          "BAD_DH_P_LENGTH\\0"
+          "BAD_DIGEST_LENGTH\\0"
+          "BAD_ECC_CERT\\0"
+          "BAD_ECPOINT\\0"
+          "BAD_HANDSHAKE_LENGTH\\0"
+          "BAD_HANDSHAKE_RECORD\\0"
+          "BAD_HELLO_REQUEST\\0"
+          "BAD_LENGTH\\0"
+          "BAD_PACKET_LENGTH\\0"
+          "BAD_RSA_ENCRYPT\\0"
+          "BAD_SRTP_MKI_VALUE\\0"
+          "BAD_SRTP_PROTECTION_PROFILE_LIST\\0"
+          "BAD_SSL_FILETYPE\\0"
+          "BAD_WRITE_RETRY\\0"
+          "BIO_NOT_SET\\0"
+          "CANNOT_SERIALIZE_PUBLIC_KEY\\0"
+          "CA_DN_LENGTH_MISMATCH\\0"
+          "CA_DN_TOO_LONG\\0"
+          "CCS_RECEIVED_EARLY\\0"
+          "CERTIFICATE_VERIFY_FAILED\\0"
+          "CERT_CB_ERROR\\0"
+          "CERT_LENGTH_MISMATCH\\0"
+          "CHANNEL_ID_NOT_P256\\0"
+          "CHANNEL_ID_SIGNATURE_INVALID\\0"
+          "CIPHER_CODE_WRONG_LENGTH\\0"
+          "CIPHER_OR_HASH_UNAVAILABLE\\0"
+          "CLIENTHELLO_PARSE_FAILED\\0"
+          "CLIENTHELLO_TLSEXT\\0"
+          "CONNECTION_REJECTED\\0"
+          "CONNECTION_TYPE_NOT_SET\\0"
+          "COOKIE_MISMATCH\\0"
+          "CUSTOM_EXTENSION_CONTENTS_TOO_LARGE\\0"
+          "CUSTOM_EXTENSION_ERROR\\0"
+          "D2I_ECDSA_SIG\\0"
+          "DATA_BETWEEN_CCS_AND_FINISHED\\0"
+          "DATA_LENGTH_TOO_LONG\\0"
+          "DECRYPTION_FAILED\\0"
+          "DECRYPTION_FAILED_OR_BAD_RECORD_MAC\\0"
+          "DH_PUBLIC_VALUE_LENGTH_IS_WRONG\\0"
+          "DH_P_TOO_LONG\\0"
+          "DIGEST_CHECK_FAILED\\0"
+          "DTLS_MESSAGE_TOO_BIG\\0"
+          "ECC_CERT_NOT_FOR_SIGNING\\0"
+          "EMPTY_SRTP_PROTECTION_PROFILE_LIST\\0"
+          "EMS_STATE_INCONSISTENT\\0"
+          "ENCRYPTED_LENGTH_TOO_LONG\\0"
+          "ERROR_ADDING_EXTENSION\\0"
+          "ERROR_IN_RECEIVED_CIPHER_LIST\\0"
+          "ERROR_PARSING_EXTENSION\\0"
+          "EVP_DIGESTSIGNFINAL_FAILED\\0"
+          "EVP_DIGESTSIGNINIT_FAILED\\0"
+          "EXCESSIVE_MESSAGE_SIZE\\0"
+          "EXTRA_DATA_IN_MESSAGE\\0"
+          "FRAGMENT_MISMATCH\\0"
+          "GOT_A_FIN_BEFORE_A_CCS\\0"
+          "GOT_CHANNEL_ID_BEFORE_A_CCS\\0"
+          "GOT_NEXT_PROTO_BEFORE_A_CCS\\0"
+          "GOT_NEXT_PROTO_WITHOUT_EXTENSION\\0"
+          "HANDSHAKE_FAILURE_ON_CLIENT_HELLO\\0"
+          "HANDSHAKE_RECORD_BEFORE_CCS\\0"
+          "HTTPS_PROXY_REQUEST\\0"
+          "HTTP_REQUEST\\0"
+          "INAPPROPRIATE_FALLBACK\\0"
+          "INVALID_COMMAND\\0"
+          "INVALID_MESSAGE\\0"
+          "INVALID_SSL_SESSION\\0"
+          "INVALID_TICKET_KEYS_LENGTH\\0"
+          "LENGTH_MISMATCH\\0"
+          "LIBRARY_HAS_NO_CIPHERS\\0"
+          "MISSING_DH_KEY\\0"
+          "MISSING_ECDSA_SIGNING_CERT\\0"
+          "MISSING_EXTENSION\\0"
+          "MISSING_RSA_CERTIFICATE\\0"
+          "MISSING_RSA_ENCRYPTING_CERT\\0"
+          "MISSING_RSA_SIGNING_CERT\\0"
+          "MISSING_TMP_DH_KEY\\0"
+          "MISSING_TMP_ECDH_KEY\\0"
+          "MIXED_SPECIAL_OPERATOR_WITH_GROUPS\\0"
+          "MTU_TOO_SMALL\\0"
+          "NEGOTIATED_BOTH_NPN_AND_ALPN\\0"
+          "NESTED_GROUP\\0"
+          "NO_CERTIFICATES_RETURNED\\0"
+          "NO_CERTIFICATE_ASSIGNED\\0"
+          "NO_CERTIFICATE_SET\\0"
+          "NO_CIPHERS_AVAILABLE\\0"
+          "NO_CIPHERS_PASSED\\0"
+          "NO_CIPHERS_SPECIFIED\\0"
+          "NO_CIPHER_MATCH\\0"
+          "NO_COMPRESSION_SPECIFIED\\0"
+          "NO_METHOD_SPECIFIED\\0"
+          "NO_P256_SUPPORT\\0"
+          "NO_PRIVATE_KEY_ASSIGNED\\0"
+          "NO_RENEGOTIATION\\0"
+          "NO_REQUIRED_DIGEST\\0"
+          "NO_SHARED_CIPHER\\0"
+          "NO_SHARED_SIGATURE_ALGORITHMS\\0"
+          "NO_SRTP_PROFILES\\0"
+          "NULL_SSL_CTX\\0"
+          "NULL_SSL_METHOD_PASSED\\0"
+          "OLD_SESSION_CIPHER_NOT_RETURNED\\0"
+          "OLD_SESSION_VERSION_NOT_RETURNED\\0"
+          "PACKET_LENGTH_TOO_LONG\\0"
+          "PARSE_TLSEXT\\0"
+          "PATH_TOO_LONG\\0"
+          "PEER_DID_NOT_RETURN_A_CERTIFICATE\\0"
+          "PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE\\0"
+          "PROTOCOL_IS_SHUTDOWN\\0"
+          "PSK_IDENTITY_NOT_FOUND\\0"
+          "PSK_NO_CLIENT_CB\\0"
+          "PSK_NO_SERVER_CB\\0"
+          "READ_BIO_NOT_SET\\0"
+          "READ_TIMEOUT_EXPIRED\\0"
+          "RECORD_LENGTH_MISMATCH\\0"
+          "RECORD_TOO_LARGE\\0"
+          "RENEGOTIATE_EXT_TOO_LONG\\0"
+          "RENEGOTIATION_ENCODING_ERR\\0"
+          "RENEGOTIATION_MISMATCH\\0"
+          "REQUIRED_CIPHER_MISSING\\0"
+          "RESUMED_EMS_SESSION_WITHOUT_EMS_EXTENSION\\0"
+          "RESUMED_NON_EMS_SESSION_WITH_EMS_EXTENSION\\0"
+          "SCSV_RECEIVED_WHEN_RENEGOTIATING\\0"
+          "SERVERHELLO_TLSEXT\\0"
+          "SESSION_ID_CONTEXT_UNINITIALIZED\\0"
+          "SESSION_MAY_NOT_BE_CREATED\\0"
+          "SIGNATURE_ALGORITHMS_ERROR\\0"
+          "SIGNATURE_ALGORITHMS_EXTENSION_SENT_BY_SERVER\\0"
+          "SRTP_COULD_NOT_ALLOCATE_PROFILES\\0"
+          "SRTP_PROTECTION_PROFILE_LIST_TOO_LONG\\0"
+          "SRTP_UNKNOWN_PROTECTION_PROFILE\\0"
+          "SSL3_EXT_INVALID_SERVERNAME\\0"
+          "SSL3_EXT_INVALID_SERVERNAME_TYPE\\0"
+          "SSLV3_ALERT_BAD_CERTIFICATE\\0"
+          "SSLV3_ALERT_BAD_RECORD_MAC\\0"
+          "SSLV3_ALERT_CERTIFICATE_EXPIRED\\0"
+          "SSLV3_ALERT_CERTIFICATE_REVOKED\\0"
+          "SSLV3_ALERT_CERTIFICATE_UNKNOWN\\0"
+          "SSLV3_ALERT_CLOSE_NOTIFY\\0"
+          "SSLV3_ALERT_DECOMPRESSION_FAILURE\\0"
+          "SSLV3_ALERT_HANDSHAKE_FAILURE\\0"
+          "SSLV3_ALERT_ILLEGAL_PARAMETER\\0"
+          "SSLV3_ALERT_NO_CERTIFICATE\\0"
+          "SSLV3_ALERT_UNEXPECTED_MESSAGE\\0"
+          "SSLV3_ALERT_UNSUPPORTED_CERTIFICATE\\0"
+          "SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION\\0"
+          "SSL_HANDSHAKE_FAILURE\\0"
+          "SSL_SESSION_ID_CALLBACK_FAILED\\0"
+          "SSL_SESSION_ID_CONFLICT\\0"
+          "SSL_SESSION_ID_CONTEXT_TOO_LONG\\0"
+          "SSL_SESSION_ID_HAS_BAD_LENGTH\\0"
+          "TLSV1_ALERT_ACCESS_DENIED\\0"
+          "TLSV1_ALERT_DECODE_ERROR\\0"
+          "TLSV1_ALERT_DECRYPTION_FAILED\\0"
+          "TLSV1_ALERT_DECRYPT_ERROR\\0"
+          "TLSV1_ALERT_EXPORT_RESTRICTION\\0"
+          "TLSV1_ALERT_INAPPROPRIATE_FALLBACK\\0"
+          "TLSV1_ALERT_INSUFFICIENT_SECURITY\\0"
+          "TLSV1_ALERT_INTERNAL_ERROR\\0"
+          "TLSV1_ALERT_NO_RENEGOTIATION\\0"
+          "TLSV1_ALERT_PROTOCOL_VERSION\\0"
+          "TLSV1_ALERT_RECORD_OVERFLOW\\0"
+          "TLSV1_ALERT_UNKNOWN_CA\\0"
+          "TLSV1_ALERT_USER_CANCELLED\\0"
+          "TLSV1_BAD_CERTIFICATE_HASH_VALUE\\0"
+          "TLSV1_BAD_CERTIFICATE_STATUS_RESPONSE\\0"
+          "TLSV1_CERTIFICATE_UNOBTAINABLE\\0"
+          "TLSV1_UNRECOGNIZED_NAME\\0"
+          "TLSV1_UNSUPPORTED_EXTENSION\\0"
+          "TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER\\0"
+          "TLS_ILLEGAL_EXPORTER_LABEL\\0"
+          "TLS_INVALID_ECPOINTFORMAT_LIST\\0"
+          "TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST\\0"
+          "TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG\\0"
+          "TOO_MANY_EMPTY_FRAGMENTS\\0"
+          "TOO_MANY_WARNING_ALERTS\\0"
+          "UNABLE_TO_FIND_ECDH_PARAMETERS\\0"
+          "UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS\\0"
+          "UNEXPECTED_EXTENSION\\0"
+          "UNEXPECTED_GROUP_CLOSE\\0"
+          "UNEXPECTED_MESSAGE\\0"
+          "UNEXPECTED_OPERATOR_IN_GROUP\\0"
+          "UNEXPECTED_RECORD\\0"
+          "UNKNOWN_ALERT_TYPE\\0"
+          "UNKNOWN_CERTIFICATE_TYPE\\0"
+          "UNKNOWN_CIPHER_RETURNED\\0"
+          "UNKNOWN_CIPHER_TYPE\\0"
+          "UNKNOWN_KEY_EXCHANGE_TYPE\\0"
+          "UNKNOWN_PROTOCOL\\0"
+          "UNKNOWN_SSL_VERSION\\0"
+          "UNKNOWN_STATE\\0"
+          "UNPROCESSED_HANDSHAKE_DATA\\0"
+          "UNSAFE_LEGACY_RENEGOTIATION_DISABLED\\0"
+          "UNSUPPORTED_COMPRESSION_ALGORITHM\\0"
+          "UNSUPPORTED_ELLIPTIC_CURVE\\0"
+          "UNSUPPORTED_PROTOCOL\\0"
+          "UNSUPPORTED_SSL_VERSION\\0"
+          "USE_SRTP_NOT_NEGOTIATED\\0"
+          "WRONG_CERTIFICATE_TYPE\\0"
+          "WRONG_CIPHER_RETURNED\\0"
+          "WRONG_CURVE\\0"
+          "WRONG_MESSAGE_TYPE\\0"
+          "WRONG_SIGNATURE_TYPE\\0"
+          "WRONG_SSL_VERSION\\0"
+          "WRONG_VERSION_NUMBER\\0"
+          "X509_LIB\\0"
+          "X509_VERIFICATION_SETUP_PROBLEMS\\0"
+          "AKID_MISMATCH\\0"
+          "BAD_PKCS7_VERSION\\0"
+          "BAD_X509_FILETYPE\\0"
+          "BASE64_DECODE_ERROR\\0"
+          "CANT_CHECK_DH_KEY\\0"
+          "CERT_ALREADY_IN_HASH_TABLE\\0"
+          "CRL_ALREADY_DELTA\\0"
+          "CRL_VERIFY_FAILURE\\0"
+          "IDP_MISMATCH\\0"
+          "INVALID_DIRECTORY\\0"
+          "INVALID_FIELD_NAME\\0"
+          "INVALID_TRUST\\0"
+          "ISSUER_MISMATCH\\0"
+          "KEY_TYPE_MISMATCH\\0"
+          "KEY_VALUES_MISMATCH\\0"
+          "LOADING_CERT_DIR\\0"
+          "LOADING_DEFAULTS\\0"
+          "NEWER_CRL_NOT_NEWER\\0"
+          "NOT_PKCS7_SIGNED_DATA\\0"
+          "NO_CERTIFICATES_INCLUDED\\0"
+          "NO_CERT_SET_FOR_US_TO_VERIFY\\0"
+          "NO_CRLS_INCLUDED\\0"
+          "NO_CRL_NUMBER\\0"
+          "PUBLIC_KEY_DECODE_ERROR\\0"
+          "PUBLIC_KEY_ENCODE_ERROR\\0"
+          "SHOULD_RETRY\\0"
+          "UNABLE_TO_FIND_PARAMETERS_IN_CHAIN\\0"
+          "UNABLE_TO_GET_CERTS_PUBLIC_KEY\\0"
+          "UNKNOWN_KEY_TYPE\\0"
+          "UNKNOWN_PURPOSE_ID\\0"
+          "UNKNOWN_TRUST_ID\\0"
+          "WRONG_LOOKUP_TYPE\\0"
+          "BAD_IP_ADDRESS\\0"
+          "BAD_OBJECT\\0"
+          "BN_DEC2BN_ERROR\\0"
+          "BN_TO_ASN1_INTEGER_ERROR\\0"
+          "CANNOT_FIND_FREE_FUNCTION\\0"
+          "DIRNAME_ERROR\\0"
+          "DISTPOINT_ALREADY_SET\\0"
+          "DUPLICATE_ZONE_ID\\0"
+          "ERROR_CONVERTING_ZONE\\0"
+          "ERROR_CREATING_EXTENSION\\0"
+          "ERROR_IN_EXTENSION\\0"
+          "EXPECTED_A_SECTION_NAME\\0"
+          "EXTENSION_EXISTS\\0"
+          "EXTENSION_NAME_ERROR\\0"
+          "EXTENSION_NOT_FOUND\\0"
+          "EXTENSION_SETTING_NOT_SUPPORTED\\0"
+          "EXTENSION_VALUE_ERROR\\0"
+          "ILLEGAL_EMPTY_EXTENSION\\0"
+          "ILLEGAL_HEX_DIGIT\\0"
+          "INCORRECT_POLICY_SYNTAX_TAG\\0"
+          "INVALID_BOOLEAN_STRING\\0"
+          "INVALID_EXTENSION_STRING\\0"
+          "INVALID_MULTIPLE_RDNS\\0"
+          "INVALID_NAME\\0"
+          "INVALID_NULL_ARGUMENT\\0"
+          "INVALID_NULL_NAME\\0"
+          "INVALID_NULL_VALUE\\0"
+          "INVALID_NUMBERS\\0"
+          "INVALID_OBJECT_IDENTIFIER\\0"
+          "INVALID_OPTION\\0"
+          "INVALID_POLICY_IDENTIFIER\\0"
+          "INVALID_PROXY_POLICY_SETTING\\0"
+          "INVALID_PURPOSE\\0"
+          "INVALID_SECTION\\0"
+          "INVALID_SYNTAX\\0"
+          "ISSUER_DECODE_ERROR\\0"
+          "NEED_ORGANIZATION_AND_NUMBERS\\0"
+          "NO_CONFIG_DATABASE\\0"
+          "NO_ISSUER_CERTIFICATE\\0"
+          "NO_ISSUER_DETAILS\\0"
+          "NO_POLICY_IDENTIFIER\\0"
+          "NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED\\0"
+          "NO_PUBLIC_KEY\\0"
+          "NO_SUBJECT_DETAILS\\0"
+          "ODD_NUMBER_OF_DIGITS\\0"
+          "OPERATION_NOT_DEFINED\\0"
+          "OTHERNAME_ERROR\\0"
+          "POLICY_LANGUAGE_ALREADY_DEFINED\\0"
+          "POLICY_PATH_LENGTH\\0"
+          "POLICY_PATH_LENGTH_ALREADY_DEFINED\\0"
+          "POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY\\0"
+          "SECTION_NOT_FOUND\\0"
+          "UNABLE_TO_GET_ISSUER_DETAILS\\0"
+          "UNABLE_TO_GET_ISSUER_KEYID\\0"
+          "UNKNOWN_BIT_STRING_ARGUMENT\\0"
+          "UNKNOWN_EXTENSION\\0"
+          "UNKNOWN_EXTENSION_NAME\\0"
+          "UNKNOWN_OPTION\\0"
+          "UNSUPPORTED_OPTION\\0"
+          "USER_TOO_LONG\\0"
+          "";
+    EOF
+  END_OF_COMMAND
+end
diff --git a/src/objective-c/GRPCClient/GRPCCall.h b/src/objective-c/GRPCClient/GRPCCall.h
index 5918f8857a..c9fda42855 100644
--- a/src/objective-c/GRPCClient/GRPCCall.h
+++ b/src/objective-c/GRPCClient/GRPCCall.h
@@ -50,6 +50,8 @@
 #import <Foundation/Foundation.h>
 #import <RxLibrary/GRXWriter.h>
 
+#include <AvailabilityMacros.h>
+
 #pragma mark gRPC errors
 
 /** Domain of NSError objects produced by gRPC. */
@@ -161,6 +163,9 @@ extern id const kGRPCTrailersKey;
 
 #pragma mark GRPCCall
 
+/** Represents a single gRPC remote call. */
+@interface GRPCCall : GRXWriter
+
 /**
  * The container of the request headers of an RPC conforms to this protocol, which is a subset of
  * NSMutableDictionary's interface. It will become a NSMutableDictionary later on.
@@ -170,21 +175,6 @@ extern id const kGRPCTrailersKey;
  * A header value is a NSString object (with only ASCII characters), unless the header name has the
  * suffix "-bin", in which case the value has to be a NSData object.
  */
-@protocol GRPCRequestHeaders <NSObject>
-
-@property(nonatomic, readonly) NSUInteger count;
-
-- (id)objectForKeyedSubscript:(NSString *)key;
-- (void)setObject:(id)obj forKeyedSubscript:(NSString *)key;
-
-- (void)removeAllObjects;
-- (void)removeObjectForKey:(NSString *)key;
-
-@end
-
-/** Represents a single gRPC remote call. */
-@interface GRPCCall : GRXWriter
-
 /**
  * These HTTP headers will be passed to the server as part of this call. Each HTTP header is a
  * name-value pair with string names and either string or binary values.
@@ -200,7 +190,7 @@ extern id const kGRPCTrailersKey;
  *
  * The property is initialized to an empty NSMutableDictionary.
  */
-@property(atomic, readonly) id<GRPCRequestHeaders> requestHeaders;
+@property(atomic, readonly) NSMutableDictionary *requestHeaders;
 
 /**
  * This dictionary is populated with the HTTP headers received from the server. This happens before
@@ -243,3 +233,24 @@ extern id const kGRPCTrailersKey;
 
 // TODO(jcanizales): Let specify a deadline. As a category of GRXWriter?
 @end
+
+#pragma mark Backwards compatibiity
+
+/** This protocol is kept for backwards compatibility with existing code. */
+DEPRECATED_MSG_ATTRIBUTE("Use NSDictionary or NSMutableDictionary instead.")
+@protocol GRPCRequestHeaders <NSObject>
+@property(nonatomic, readonly) NSUInteger count;
+
+- (id)objectForKeyedSubscript:(NSString *)key;
+- (void)setObject:(id)obj forKeyedSubscript:(NSString *)key;
+
+- (void)removeAllObjects;
+- (void)removeObjectForKey:(NSString *)key;
+@end
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
+/** This is only needed for backwards-compatibility. */
+@interface NSMutableDictionary (GRPCRequestHeaders) <GRPCRequestHeaders>
+@end
+#pragma clang diagnostic pop
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index b6986bf59c..f79b7d0bc0 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -221,7 +221,7 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 
 #pragma mark Send headers
 
-- (void)sendHeaders:(id<GRPCRequestHeaders>)headers {
+- (void)sendHeaders:(NSDictionary *)headers {
   // TODO(jcanizales): Add error handlers for async failures
   [_wrappedCall startBatchWithOperations:@[[[GRPCOpSendMetadata alloc] initWithMetadata:headers
                                                                                 handler:nil]]];
diff --git a/src/objective-c/GRPCClient/private/GRPCRequestHeaders.h b/src/objective-c/GRPCClient/private/GRPCRequestHeaders.h
index cf5a1be9d6..b580f19406 100644
--- a/src/objective-c/GRPCClient/private/GRPCRequestHeaders.h
+++ b/src/objective-c/GRPCClient/private/GRPCRequestHeaders.h
@@ -32,21 +32,14 @@
  */
 
 #import <Foundation/Foundation.h>
-#include <grpc/grpc.h>
 
 #import "../GRPCCall.h"
 
-@interface GRPCRequestHeaders : NSObject<GRPCRequestHeaders>
-
-@property(nonatomic, readonly) NSUInteger count;
-@property(nonatomic, readonly) grpc_metadata *grpc_metadataArray;
+@interface GRPCRequestHeaders : NSMutableDictionary
 
 - (instancetype)initWithCall:(GRPCCall *)call;
 
-- (id)objectForKeyedSubscript:(NSString *)key;
-- (void)setObject:(id)obj forKeyedSubscript:(NSString *)key;
-
-- (void)removeAllObjects;
-- (void)removeObjectForKey:(NSString *)key;
+- (instancetype)initWithCall:(GRPCCall *)call
+                     storage:(NSMutableDictionary *)storage NS_DESIGNATED_INITIALIZER;
 
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m b/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m
index d23f21c0f9..c6a03c145e 100644
--- a/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m
+++ b/src/objective-c/GRPCClient/private/GRPCRequestHeaders.m
@@ -68,17 +68,44 @@ static void CheckKeyValuePairIsValid(NSString *key, id value) {
 
 @implementation GRPCRequestHeaders {
   __weak GRPCCall *_call;
+  // The NSMutableDictionary superclass doesn't hold any storage (so that people can implement their
+  // own in subclasses). As that's not the reason we're subclassing, we just delegate storage to the
+  // default NSMutableDictionary subclass returned by the cluster (e.g. __NSDictionaryM on iOS 9).
   NSMutableDictionary *_delegate;
 }
 
+- (instancetype)init {
+  return [self initWithCall:nil];
+}
+
+- (instancetype)initWithCapacity:(NSUInteger)numItems {
+  return [self init];
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+  return [self init];
+}
+
 - (instancetype)initWithCall:(GRPCCall *)call {
+  return [self initWithCall:call storage:[NSMutableDictionary dictionary]];
+}
+
+// Designated initializer
+- (instancetype)initWithCall:(GRPCCall *)call storage:(NSMutableDictionary *)storage {
+  // TODO(jcanizales): Throw if call or storage are nil.
   if ((self = [super init])) {
     _call = call;
-    _delegate = [NSMutableDictionary dictionary];
+    _delegate = storage;
   }
   return self;
 }
 
+- (instancetype)initWithObjects:(const id  _Nonnull __unsafe_unretained *)objects
+                        forKeys:(const id<NSCopying>  _Nonnull __unsafe_unretained *)keys
+                          count:(NSUInteger)cnt {
+  return [self init];
+}
+
 - (void)checkCallIsNotStarted {
   if (_call.state != GRXWriterStateNotStarted) {
     [NSException raise:@"Invalid modification"
@@ -86,11 +113,11 @@ static void CheckKeyValuePairIsValid(NSString *key, id value) {
   }
 }
 
-- (id)objectForKeyedSubscript:(NSString *)key {
+- (id)objectForKey:(NSString *)key {
   return _delegate[key.lowercaseString];
 }
 
-- (void)setObject:(id)obj forKeyedSubscript:(NSString *)key {
+- (void)setObject:(id)obj forKey:(NSString *)key {
   [self checkCallIsNotStarted];
   CheckIsNonNilASCII(@"Header name", key);
   key = key.lowercaseString;
@@ -103,16 +130,12 @@ static void CheckKeyValuePairIsValid(NSString *key, id value) {
   [_delegate removeObjectForKey:key.lowercaseString];
 }
 
-- (void)removeAllObjects {
-  [self checkCallIsNotStarted];
-  [_delegate removeAllObjects];
-}
-
 - (NSUInteger)count {
   return _delegate.count;
 }
 
-- (grpc_metadata *)grpc_metadataArray {
-  return _delegate.grpc_metadataArray;
+- (NSEnumerator * _Nonnull)keyEnumerator {
+  return [_delegate keyEnumerator];
 }
+
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
index 7747aa53ef..71e7e0e54e 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
@@ -45,7 +45,7 @@
 
 @interface GRPCOpSendMetadata : GRPCOperation
 
-- (instancetype)initWithMetadata:(GRPCRequestHeaders *)metadata
+- (instancetype)initWithMetadata:(NSDictionary *)metadata
                          handler:(void(^)())handler NS_DESIGNATED_INITIALIZER;
 
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index cea7c479e0..fe3d51da53 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -65,7 +65,7 @@
   return [self initWithMetadata:nil handler:nil];
 }
 
-- (instancetype)initWithMetadata:(GRPCRequestHeaders *)metadata handler:(void (^)())handler {
+- (instancetype)initWithMetadata:(NSDictionary *)metadata handler:(void (^)())handler {
   if (self = [super init]) {
     _op.op = GRPC_OP_SEND_INITIAL_METADATA;
     _op.data.send_initial_metadata.count = metadata.count;
diff --git a/src/objective-c/examples/Sample/Podfile b/src/objective-c/examples/Sample/Podfile
index 3b2f412569..93859fb734 100644
--- a/src/objective-c/examples/Sample/Podfile
+++ b/src/objective-c/examples/Sample/Podfile
@@ -2,6 +2,7 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
 pod 'Protobuf', :path => "../../../../third_party/protobuf"
+pod 'BoringSSL', :podspec => "../.."
 pod 'gRPC', :path => "../../../.."
 pod 'RemoteTest', :path => "../RemoteTestClient"
 
diff --git a/src/objective-c/examples/SwiftSample/Podfile b/src/objective-c/examples/SwiftSample/Podfile
index 3611b00863..f2df4a34a3 100644
--- a/src/objective-c/examples/SwiftSample/Podfile
+++ b/src/objective-c/examples/SwiftSample/Podfile
@@ -2,6 +2,7 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
 pod 'Protobuf', :path => "../../../../third_party/protobuf"
+pod 'BoringSSL', :podspec => "../.."
 pod 'gRPC', :path => "../../../.."
 pod 'RemoteTest', :path => "../RemoteTestClient"
 
diff --git a/src/objective-c/tests/Podfile b/src/objective-c/tests/Podfile
index cab608d37f..7ec7a25898 100644
--- a/src/objective-c/tests/Podfile
+++ b/src/objective-c/tests/Podfile
@@ -2,6 +2,7 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
 pod 'Protobuf', :path => "../../../third_party/protobuf"
+pod 'BoringSSL', :podspec => ".."
 pod 'gRPC', :path => "../../.."
 pod 'RemoteTest', :path => "RemoteTestClient"
 
diff --git a/src/python/grpcio/.gitignore b/src/python/grpcio/.gitignore
index 4c02b8d14d..95b96f7c1e 100644
--- a/src/python/grpcio/.gitignore
+++ b/src/python/grpcio/.gitignore
@@ -5,5 +5,12 @@ dist/
 *.egg
 *.egg/
 *.eggs/
+*_pb2.py
+.coverage
+.coverage.*
+.cache/
+.tox/
+nosetests.xml
 doc/
 _grpcio_metadata.py
+htmlcov/
diff --git a/src/python/grpcio/MANIFEST.in b/src/python/grpcio/MANIFEST.in
index 9583dc7768..407eeabc17 100644
--- a/src/python/grpcio/MANIFEST.in
+++ b/src/python/grpcio/MANIFEST.in
@@ -1,3 +1,4 @@
 graft grpc
+graft tests
 include commands.py
 include requirements.txt
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 8a2f2d6283..d9fd023b21 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -29,14 +29,18 @@
 
 """Provides distutils command classes for the GRPC Python setup process."""
 
+import distutils
 import os
 import os.path
+import re
+import subprocess
 import sys
 
 import setuptools
 from setuptools.command import build_py
+from setuptools.command import test
 
-_CONF_PY_ADDENDUM = """
+CONF_PY_ADDENDUM = """
 extensions.append('sphinx.ext.napoleon')
 napoleon_google_docstring = True
 napoleon_numpy_docstring = True
@@ -48,7 +52,7 @@ html_theme = 'sphinx_rtd_theme'
 class SphinxDocumentation(setuptools.Command):
   """Command to generate documentation via sphinx."""
 
-  description = ''
+  description = 'generate sphinx documentation'
   user_options = []
 
   def initialize_options(self):
@@ -72,14 +76,61 @@ class SphinxDocumentation(setuptools.Command):
         '-o', os.path.join('doc', 'src'), src_dir])
     conf_filepath = os.path.join('doc', 'src', 'conf.py')
     with open(conf_filepath, 'a') as conf_file:
-      conf_file.write(_CONF_PY_ADDENDUM)
+      conf_file.write(CONF_PY_ADDENDUM)
     sphinx.main(['', os.path.join('doc', 'src'), os.path.join('doc', 'build')])
 
 
+class BuildProtoModules(setuptools.Command):
+  """Command to generate project *_pb2.py modules from proto files."""
+
+  description = 'build protobuf modules'
+  user_options = [
+    ('include=', None, 'path patterns to include in protobuf generation'),
+    ('exclude=', None, 'path patterns to exclude from protobuf generation')
+  ]
+
+  def initialize_options(self):
+    self.exclude = None
+    self.include = r'.*\.proto$'
+    self.protoc_command = None
+    self.grpc_python_plugin_command = None
+
+  def finalize_options(self):
+    self.protoc_command = distutils.spawn.find_executable('protoc')
+    self.grpc_python_plugin_command = distutils.spawn.find_executable(
+        'grpc_python_plugin')
+
+  def run(self):
+    include_regex = re.compile(self.include)
+    exclude_regex = re.compile(self.exclude) if self.exclude else None
+    paths = []
+    root_directory = os.getcwd()
+    for walk_root, directories, filenames in os.walk(root_directory):
+      for filename in filenames:
+        path = os.path.join(walk_root, filename)
+        if include_regex.match(path) and not (
+            exclude_regex and exclude_regex.match(path)):
+          paths.append(path)
+    command = [
+        self.protoc_command,
+        '--plugin=protoc-gen-python-grpc={}'.format(
+            self.grpc_python_plugin_command),
+        '-I {}'.format(root_directory),
+        '--python_out={}'.format(root_directory),
+        '--python-grpc_out={}'.format(root_directory),
+    ] + paths
+    try:
+      subprocess.check_output(' '.join(command), cwd=root_directory, shell=True,
+                              stderr=subprocess.STDOUT)
+    except subprocess.CalledProcessError as e:
+      raise Exception('Command:\n{}\nMessage:\n{}\nOutput:\n{}'.format(
+          command, e.message, e.output))
+
+
 class BuildProjectMetadata(setuptools.Command):
   """Command to generate project metadata in a module."""
 
-  description = ''
+  description = 'build grpcio project metadata files'
   user_options = []
 
   def initialize_options(self):
@@ -98,5 +149,73 @@ class BuildPy(build_py.build_py):
   """Custom project build command."""
 
   def run(self):
+    self.run_command('build_proto_modules')
     self.run_command('build_project_metadata')
     build_py.build_py.run(self)
+
+
+class Gather(setuptools.Command):
+  """Command to gather project dependencies."""
+
+  description = 'gather dependencies for grpcio'
+  user_options = [
+    ('test', 't', 'flag indicating to gather test dependencies'),
+    ('install', 'i', 'flag indicating to gather install dependencies')
+  ]
+
+  def initialize_options(self):
+    self.test = False
+    self.install = False
+
+  def finalize_options(self):
+    # distutils requires this override.
+    pass
+
+  def run(self):
+    if self.install and self.distribution.install_requires:
+      self.distribution.fetch_build_eggs(self.distribution.install_requires)
+    if self.test and self.distribution.tests_require:
+      self.distribution.fetch_build_eggs(self.distribution.tests_require)
+
+
+class RunInterop(test.test):
+
+  description = 'run interop test client/server'
+  user_options = [
+    ('args=', 'a', 'pass-thru arguments for the client/server'),
+    ('client', 'c', 'flag indicating to run the client'),
+    ('server', 's', 'flag indicating to run the server')
+  ]
+
+  def initialize_options(self):
+    self.args = ''
+    self.client = False
+    self.server = False
+
+  def finalize_options(self):
+    if self.client and self.server:
+      raise DistutilsOptionError('you may only specify one of client or server')
+
+  def run(self):
+    if self.distribution.install_requires:
+      self.distribution.fetch_build_eggs(self.distribution.install_requires)
+    if self.distribution.tests_require:
+      self.distribution.fetch_build_eggs(self.distribution.tests_require)
+    if self.client:
+      self.run_client()
+    elif self.server:
+      self.run_server()
+
+  def run_server(self):
+    # We import here to ensure that our setuptools parent has had a chance to
+    # edit the Python system path.
+    from tests.interop import server
+    sys.argv[1:] = self.args.split()
+    server.serve()
+
+  def run_client(self):
+    # We import here to ensure that our setuptools parent has had a chance to
+    # edit the Python system path.
+    from tests.interop import client
+    sys.argv[1:] = self.args.split()
+    client.test_interoperability()
diff --git a/src/python/grpcio/grpc/beta/_server.py b/src/python/grpcio/grpc/beta/_server.py
index 05b954d186..4f454437c0 100644
--- a/src/python/grpcio/grpc/beta/_server.py
+++ b/src/python/grpcio/grpc/beta/_server.py
@@ -44,6 +44,12 @@ _DEFAULT_TIMEOUT = 300
 _MAXIMUM_TIMEOUT = 24 * 60 * 60
 
 
+def _set_event():
+  event = threading.Event()
+  event.set()
+  return event
+
+
 class _GRPCServicer(base.Servicer):
 
   def __init__(self, delegate):
@@ -61,86 +67,143 @@ class _GRPCServicer(base.Servicer):
         raise
 
 
-def _disassemble(grpc_link, end_link, pool, event, grace):
-  grpc_link.begin_stop()
-  end_link.stop(grace).wait()
-  grpc_link.end_stop()
-  grpc_link.join_link(utilities.NULL_LINK)
-  end_link.join_link(utilities.NULL_LINK)
-  if pool is not None:
-    pool.shutdown(wait=True)
-  event.set()
+class _Server(interfaces.Server):
 
+  def __init__(
+      self, implementations, multi_implementation, pool, pool_size,
+      default_timeout, maximum_timeout, grpc_link):
+    self._lock = threading.Lock()
+    self._implementations = implementations
+    self._multi_implementation = multi_implementation
+    self._customer_pool = pool
+    self._pool_size = pool_size
+    self._default_timeout = default_timeout
+    self._maximum_timeout = maximum_timeout
+    self._grpc_link = grpc_link
 
-class Server(interfaces.Server):
+    self._end_link = None
+    self._stop_events = None
+    self._pool = None
 
-  def __init__(self, grpc_link, end_link, pool):
-    self._grpc_link = grpc_link
-    self._end_link = end_link
-    self._pool = pool
+  def _start(self):
+    with self._lock:
+      if self._end_link is not None:
+        raise ValueError('Cannot start already-started server!')
+
+      if self._customer_pool is None:
+        self._pool = logging_pool.pool(self._pool_size)
+        assembly_pool = self._pool
+      else:
+        assembly_pool = self._customer_pool
+
+      servicer = _GRPCServicer(
+          _crust_implementations.servicer(
+              self._implementations, self._multi_implementation, assembly_pool))
+
+      self._end_link = _core_implementations.service_end_link(
+          servicer, self._default_timeout, self._maximum_timeout)
+
+      self._grpc_link.join_link(self._end_link)
+      self._end_link.join_link(self._grpc_link)
+      self._grpc_link.start()
+      self._end_link.start()
+
+  def _dissociate_links_and_shut_down_pool(self):
+    self._grpc_link.end_stop()
+    self._grpc_link.join_link(utilities.NULL_LINK)
+    self._end_link.join_link(utilities.NULL_LINK)
+    self._end_link = None
+    if self._pool is not None:
+      self._pool.shutdown(wait=True)
+    self._pool = None
+
+  def _stop_stopping(self):
+    self._dissociate_links_and_shut_down_pool()
+    for stop_event in self._stop_events:
+      stop_event.set()
+    self._stop_events = None
+
+  def _stop_started(self):
+    self._grpc_link.begin_stop()
+    self._end_link.stop(0).wait()
+    self._dissociate_links_and_shut_down_pool()
+
+  def _foreign_thread_stop(self, end_stop_event, stop_events):
+    end_stop_event.wait()
+    with self._lock:
+      if self._stop_events is stop_events:
+        self._stop_stopping()
+
+  def _schedule_stop(self, grace):
+    with self._lock:
+      if self._end_link is None:
+        return _set_event()
+      server_stop_event = threading.Event()
+      if self._stop_events is None:
+        self._stop_events = [server_stop_event]
+        self._grpc_link.begin_stop()
+      else:
+        self._stop_events.append(server_stop_event)
+      end_stop_event = self._end_link.stop(grace)
+      end_stop_thread = threading.Thread(
+          target=self._foreign_thread_stop,
+          args=(end_stop_event, self._stop_events))
+      end_stop_thread.start()
+      return server_stop_event
+
+  def _stop_now(self):
+    with self._lock:
+      if self._end_link is not None:
+        if self._stop_events is None:
+          self._stop_started()
+        else:
+          self._stop_stopping()
 
   def add_insecure_port(self, address):
-    return self._grpc_link.add_port(address, None)
+    with self._lock:
+      if self._end_link is None:
+        return self._grpc_link.add_port(address, None)
+      else:
+        raise ValueError('Can\'t add port to serving server!')
 
   def add_secure_port(self, address, server_credentials):
-    return self._grpc_link.add_port(
-        address, server_credentials._intermediary_low_credentials)  # pylint: disable=protected-access
-
-  def _start(self):
-    self._grpc_link.join_link(self._end_link)
-    self._end_link.join_link(self._grpc_link)
-    self._grpc_link.start()
-    self._end_link.start()
-
-  def _stop(self, grace):
-    stop_event = threading.Event()
-    if 0 < grace:
-      disassembly_thread = threading.Thread(
-          target=_disassemble,
-          args=(
-              self._grpc_link, self._end_link, self._pool, stop_event, grace,))
-      disassembly_thread.start()
-      return stop_event
-    else:
-      _disassemble(self._grpc_link, self._end_link, self._pool, stop_event, 0)
-      return stop_event
+    with self._lock:
+      if self._end_link is None:
+        return self._grpc_link.add_port(
+            address, server_credentials._intermediary_low_credentials)  # pylint: disable=protected-access
+      else:
+        raise ValueError('Can\'t add port to serving server!')
 
   def start(self):
     self._start()
 
   def stop(self, grace):
-    return self._stop(grace)
+    if 0 < grace:
+      return self._schedule_stop(grace)
+    else:
+      self._stop_now()
+      return _set_event()
 
   def __enter__(self):
     self._start()
     return self
 
   def __exit__(self, exc_type, exc_val, exc_tb):
-    self._stop(0).wait()
+    self._stop_now()
     return False
 
+  def __del__(self):
+    self._stop_now()
+
 
 def server(
     implementations, multi_implementation, request_deserializers,
     response_serializers, thread_pool, thread_pool_size, default_timeout,
     maximum_timeout):
-  if thread_pool is None:
-    service_thread_pool = logging_pool.pool(
-        _DEFAULT_POOL_SIZE if thread_pool_size is None else thread_pool_size)
-    assembly_thread_pool = service_thread_pool
-  else:
-    service_thread_pool = thread_pool
-    assembly_thread_pool = None
-
-  servicer = _GRPCServicer(
-      _crust_implementations.servicer(
-          implementations, multi_implementation, service_thread_pool))
-
   grpc_link = service.service_link(request_deserializers, response_serializers)
-
-  end_link = _core_implementations.service_end_link(
-      servicer,
+  return _Server(
+      implementations, multi_implementation, thread_pool,
+      _DEFAULT_POOL_SIZE if thread_pool_size is None else thread_pool_size,
       _DEFAULT_TIMEOUT if default_timeout is None else default_timeout,
-      _MAXIMUM_TIMEOUT if maximum_timeout is None else maximum_timeout)
-
-  return Server(grpc_link, end_link, assembly_thread_pool)
+      _MAXIMUM_TIMEOUT if maximum_timeout is None else maximum_timeout,
+      grpc_link)
diff --git a/src/python/grpcio/grpc/beta/_stub.py b/src/python/grpcio/grpc/beta/_stub.py
index 11dab889cd..2af019309a 100644
--- a/src/python/grpcio/grpc/beta/_stub.py
+++ b/src/python/grpcio/grpc/beta/_stub.py
@@ -42,76 +42,114 @@ _DEFAULT_POOL_SIZE = 6
 
 class _AutoIntermediary(object):
 
-  def __init__(self, delegate, on_deletion):
+  def __init__(self, up, down, delegate):
+    self._lock = threading.Lock()
+    self._up = up
+    self._down = down
+    self._in_context = False
     self._delegate = delegate
-    self._on_deletion = on_deletion
 
   def __getattr__(self, attr):
-    return getattr(self._delegate, attr)
+    with self._lock:
+      if self._delegate is None:
+        raise AttributeError('No useful attributes out of context!')
+      else:
+        return getattr(self._delegate, attr)
 
   def __enter__(self):
-    return self
+    with self._lock:
+      if self._in_context:
+        raise ValueError('Already in context!')
+      elif self._delegate is None:
+        self._delegate = self._up()
+      self._in_context = True
+      return self
 
   def __exit__(self, exc_type, exc_val, exc_tb):
-    return False
+    with self._lock:
+      if not self._in_context:
+        raise ValueError('Not in context!')
+      self._down()
+      self._in_context = False
+      self._delegate = None
+      return False
 
   def __del__(self):
-    self._on_deletion()
+    with self._lock:
+      if self._delegate is not None:
+        self._down()
+        self._delegate = None
+
+
+class _StubAssemblyManager(object):
+
+  def __init__(
+      self, thread_pool, thread_pool_size, end_link, grpc_link, stub_creator):
+    self._thread_pool = thread_pool
+    self._pool_size = thread_pool_size
+    self._end_link = end_link
+    self._grpc_link = grpc_link
+    self._stub_creator = stub_creator
+    self._own_pool = None
+
+  def up(self):
+    if self._thread_pool is None:
+      self._own_pool = logging_pool.pool(
+          _DEFAULT_POOL_SIZE if self._pool_size is None else self._pool_size)
+      assembly_pool = self._own_pool
+    else:
+      assembly_pool = self._thread_pool
+    self._end_link.join_link(self._grpc_link)
+    self._grpc_link.join_link(self._end_link)
+    self._end_link.start()
+    self._grpc_link.start()
+    return self._stub_creator(self._end_link, assembly_pool)
+
+  def down(self):
+    self._end_link.stop(0).wait()
+    self._grpc_link.stop()
+    self._end_link.join_link(utilities.NULL_LINK)
+    self._grpc_link.join_link(utilities.NULL_LINK)
+    if self._own_pool is not None:
+      self._own_pool.shutdown(wait=True)
+      self._own_pool = None
 
 
 def _assemble(
     channel, host, metadata_transformer, request_serializers,
-    response_deserializers, thread_pool, thread_pool_size):
+    response_deserializers, thread_pool, thread_pool_size, stub_creator):
   end_link = _core_implementations.invocation_end_link()
   grpc_link = invocation.invocation_link(
       channel, host, metadata_transformer, request_serializers,
       response_deserializers)
-  if thread_pool is None:
-    invocation_pool = logging_pool.pool(
-        _DEFAULT_POOL_SIZE if thread_pool_size is None else thread_pool_size)
-    assembly_pool = invocation_pool
-  else:
-    invocation_pool = thread_pool
-    assembly_pool = None
-  end_link.join_link(grpc_link)
-  grpc_link.join_link(end_link)
-  end_link.start()
-  grpc_link.start()
-  return end_link, grpc_link, invocation_pool, assembly_pool
-
-
-def _disassemble(end_link, grpc_link, pool):
-  end_link.stop(24 * 60 * 60).wait()
-  grpc_link.stop()
-  end_link.join_link(utilities.NULL_LINK)
-  grpc_link.join_link(utilities.NULL_LINK)
-  if pool is not None:
-    pool.shutdown(wait=True)
-
-
-def _wrap_assembly(stub, end_link, grpc_link, assembly_pool):
-  disassembly_thread = threading.Thread(
-      target=_disassemble, args=(end_link, grpc_link, assembly_pool))
-  return _AutoIntermediary(stub, disassembly_thread.start)
+  stub_assembly_manager = _StubAssemblyManager(
+      thread_pool, thread_pool_size, end_link, grpc_link, stub_creator)
+  stub = stub_assembly_manager.up()
+  return _AutoIntermediary(
+      stub_assembly_manager.up, stub_assembly_manager.down, stub)
+
+
+def _dynamic_stub_creator(service, cardinalities):
+  def create_dynamic_stub(end_link, invocation_pool):
+    return _crust_implementations.dynamic_stub(
+        end_link, service, cardinalities, invocation_pool)
+  return create_dynamic_stub
 
 
 def generic_stub(
     channel, host, metadata_transformer, request_serializers,
     response_deserializers, thread_pool, thread_pool_size):
-  end_link, grpc_link, invocation_pool, assembly_pool = _assemble(
+  return _assemble(
       channel, host, metadata_transformer, request_serializers,
-      response_deserializers, thread_pool, thread_pool_size)
-  stub = _crust_implementations.generic_stub(end_link, invocation_pool)
-  return _wrap_assembly(stub, end_link, grpc_link, assembly_pool)
+      response_deserializers, thread_pool, thread_pool_size,
+      _crust_implementations.generic_stub)
 
 
 def dynamic_stub(
     channel, host, service, cardinalities, metadata_transformer,
     request_serializers, response_deserializers, thread_pool,
     thread_pool_size):
-  end_link, grpc_link, invocation_pool, assembly_pool = _assemble(
+  return _assemble(
       channel, host, metadata_transformer, request_serializers,
-      response_deserializers, thread_pool, thread_pool_size)
-  stub = _crust_implementations.dynamic_stub(
-      end_link, service, cardinalities, invocation_pool)
-  return _wrap_assembly(stub, end_link, grpc_link, assembly_pool)
+      response_deserializers, thread_pool, thread_pool_size,
+      _dynamic_stub_creator(service, cardinalities))
diff --git a/src/python/grpcio/grpc/framework/core/_end.py b/src/python/grpcio/grpc/framework/core/_end.py
index 8e07d9061e..9c615672aa 100644
--- a/src/python/grpcio/grpc/framework/core/_end.py
+++ b/src/python/grpcio/grpc/framework/core/_end.py
@@ -85,35 +85,6 @@ def _future_shutdown(lock, cycle, event):
   return in_future
 
 
-def _termination_action(lock, stats, operation_id, cycle):
-  """Constructs the termination action for a single operation.
-
-  Args:
-    lock: A lock to hold during the termination action.
-    stats: A mapping from base.Outcome.Kind values to integers to increment
-      with the outcome kind given to the termination action.
-    operation_id: The operation ID for the termination action.
-    cycle: A _Cycle value to be updated during the termination action.
-
-  Returns:
-    A callable that takes an operation outcome kind as its sole parameter and
-      that should be used as the termination action for the operation
-      associated with the given operation ID.
-  """
-  def termination_action(outcome_kind):
-    with lock:
-      stats[outcome_kind] += 1
-      cycle.operations.pop(operation_id, None)
-      if not cycle.operations:
-        for action in cycle.idle_actions:
-          cycle.pool.submit(action)
-        cycle.idle_actions = []
-        if cycle.grace:
-          _cancel_futures(cycle.futures)
-          cycle.pool.shutdown(wait=False)
-  return termination_action
-
-
 class _End(End):
   """An End implementation."""
 
@@ -133,6 +104,31 @@ class _End(End):
 
     self._cycle = None
 
+  def _termination_action(self, operation_id):
+    """Constructs the termination action for a single operation.
+
+    Args:
+      operation_id: The operation ID for the termination action.
+
+    Returns:
+      A callable that takes an operation outcome kind as its sole parameter and
+        that should be used as the termination action for the operation
+        associated with the given operation ID.
+    """
+    def termination_action(outcome_kind):
+      with self._lock:
+        self._stats[outcome_kind] += 1
+        self._cycle.operations.pop(operation_id, None)
+        if not self._cycle.operations:
+          for action in self._cycle.idle_actions:
+            self._cycle.pool.submit(action)
+          self._cycle.idle_actions = []
+          if self._cycle.grace:
+            _cancel_futures(self._cycle.futures)
+            self._cycle.pool.shutdown(wait=False)
+            self._cycle = None
+    return termination_action
+
   def start(self):
     """See base.End.start for specification."""
     with self._lock:
@@ -174,8 +170,7 @@ class _End(End):
     with self._lock:
       if self._cycle is None or self._cycle.grace:
         raise ValueError('Can\'t operate on stopped or stopping End!')
-      termination_action = _termination_action(
-          self._lock, self._stats, operation_id, self._cycle)
+      termination_action = self._termination_action(operation_id)
       operation = _operation.invocation_operate(
           operation_id, group, method, subscription, timeout, protocol_options,
           initial_metadata, payload, completion, self._mate.accept_ticket,
@@ -208,8 +203,7 @@ class _End(End):
         if operation is not None:
           operation.handle_ticket(ticket)
         elif self._servicer_package is not None and not self._cycle.grace:
-          termination_action = _termination_action(
-              self._lock, self._stats, ticket.operation_id, self._cycle)
+          termination_action = self._termination_action(ticket.operation_id)
           operation = _operation.service_operate(
               self._servicer_package, ticket, self._mate.accept_ticket,
               termination_action, self._cycle.pool)
diff --git a/src/python/grpcio/requirements.txt b/src/python/grpcio/requirements.txt
index ee8568120b..06516ee0d7 100644
--- a/src/python/grpcio/requirements.txt
+++ b/src/python/grpcio/requirements.txt
@@ -1,3 +1,4 @@
 enum34>=1.0.4
 futures>=2.2.0
 cython>=0.23
+coverage>=4.0
diff --git a/src/python/grpcio/setup.cfg b/src/python/grpcio/setup.cfg
index 8f69613632..52b6b50900 100644
--- a/src/python/grpcio/setup.cfg
+++ b/src/python/grpcio/setup.cfg
@@ -1,2 +1,8 @@
+[coverage:run]
+plugins = Cython.Coverage
+
 [build_ext]
 inplace=1
+
+[build_proto_modules]
+exclude=.*protoc_plugin/protoc_plugin_test\.proto$
diff --git a/src/python/grpcio/setup.py b/src/python/grpcio/setup.py
index ec68eb6755..8ac185bd6b 100644
--- a/src/python/grpcio/setup.py
+++ b/src/python/grpcio/setup.py
@@ -43,12 +43,21 @@ os.chdir(os.path.dirname(os.path.abspath(__file__)))
 # Break import-style to ensure we can actually find our commands module.
 import commands
 
-# Use environment variables to determine whether or not the Cython extension
-# should *use* Cython or use the generated C files. Note that this requires the
-# C files to have been generated by building first *with* Cython support.
-_BUILD_WITH_CYTHON = os.environ.get('GRPC_PYTHON_BUILD_WITH_CYTHON', False)
+# Environment variable to determine whether or not the Cython extension should
+# *use* Cython or use the generated C files. Note that this requires the C files
+# to have been generated by building first *with* Cython support.
+BUILD_WITH_CYTHON = os.environ.get('GRPC_PYTHON_BUILD_WITH_CYTHON', False)
 
-_C_EXTENSION_SOURCES = (
+# Environment variable to determine whether or not to enable coverage analysis
+# in Cython modules.
+ENABLE_CYTHON_TRACING = os.environ.get(
+    'GRPC_PYTHON_ENABLE_CYTHON_TRACING', False)
+
+# Environment variable to determine whether or not to include the test files in
+# the installation.
+INSTALL_TESTS = os.environ.get('GRPC_PYTHON_INSTALL_TESTS', False)
+
+C_EXTENSION_SOURCES = (
     'grpc/_adapter/_c/module.c',
     'grpc/_adapter/_c/types.c',
     'grpc/_adapter/_c/utility.c',
@@ -61,9 +70,9 @@ _C_EXTENSION_SOURCES = (
     'grpc/_adapter/_c/types/server.c',
 )
 
-_CYTHON_EXTENSION_PACKAGE_NAMES = ()
+CYTHON_EXTENSION_PACKAGE_NAMES = ()
 
-_CYTHON_EXTENSION_MODULE_NAMES = (
+CYTHON_EXTENSION_MODULE_NAMES = (
     'grpc._cython.cygrpc',
     'grpc._cython._cygrpc.call',
     'grpc._cython._cygrpc.channel',
@@ -73,24 +82,24 @@ _CYTHON_EXTENSION_MODULE_NAMES = (
     'grpc._cython._cygrpc.server',
 )
 
-_EXTENSION_INCLUDE_DIRECTORIES = (
+EXTENSION_INCLUDE_DIRECTORIES = (
     '.',
 )
 
-_EXTENSION_LIBRARIES = (
+EXTENSION_LIBRARIES = (
     'grpc',
     'gpr',
 )
 if not "darwin" in sys.platform:
-    _EXTENSION_LIBRARIES += ('rt',)
+    EXTENSION_LIBRARIES += ('rt',)
 
 
-_C_EXTENSION_MODULE = _core.Extension(
-    'grpc._adapter._c', sources=list(_C_EXTENSION_SOURCES),
-    include_dirs=list(_EXTENSION_INCLUDE_DIRECTORIES),
-    libraries=list(_EXTENSION_LIBRARIES),
+C_EXTENSION_MODULE = _core.Extension(
+    'grpc._adapter._c', sources=list(C_EXTENSION_SOURCES),
+    include_dirs=list(EXTENSION_INCLUDE_DIRECTORIES),
+    libraries=list(EXTENSION_LIBRARIES)
 )
-_EXTENSION_MODULES = [_C_EXTENSION_MODULE]
+EXTENSION_MODULES = [C_EXTENSION_MODULE]
 
 
 def cython_extensions(package_names, module_names, include_dirs, libraries,
@@ -101,48 +110,89 @@ def cython_extensions(package_names, module_names, include_dirs, libraries,
   extensions = [
       _extension.Extension(
           name=module_name, sources=[module_file],
-          include_dirs=include_dirs, libraries=libraries
+          include_dirs=include_dirs, libraries=libraries,
+          define_macros=[('CYTHON_TRACE_NOGIL', 1)] if ENABLE_CYTHON_TRACING else []
       ) for (module_name, module_file) in zip(module_names, module_files)
   ]
   if build_with_cython:
     import Cython.Build
-    return Cython.Build.cythonize(extensions)
+    return Cython.Build.cythonize(
+        extensions,
+        compiler_directives={'linetrace': bool(ENABLE_CYTHON_TRACING)})
   else:
     return extensions
 
-_CYTHON_EXTENSION_MODULES = cython_extensions(
-    list(_CYTHON_EXTENSION_PACKAGE_NAMES), list(_CYTHON_EXTENSION_MODULE_NAMES),
-    list(_EXTENSION_INCLUDE_DIRECTORIES), list(_EXTENSION_LIBRARIES),
-    bool(_BUILD_WITH_CYTHON))
+CYTHON_EXTENSION_MODULES = cython_extensions(
+    list(CYTHON_EXTENSION_PACKAGE_NAMES), list(CYTHON_EXTENSION_MODULE_NAMES),
+    list(EXTENSION_INCLUDE_DIRECTORIES), list(EXTENSION_LIBRARIES),
+    bool(BUILD_WITH_CYTHON))
 
-_PACKAGES = setuptools.find_packages('.')
-
-_PACKAGE_DIRECTORIES = {
+PACKAGE_DIRECTORIES = {
     '': '.',
 }
 
-_INSTALL_REQUIRES = (
+INSTALL_REQUIRES = (
     'enum34>=1.0.4',
     'futures>=2.2.0',
 )
 
-_SETUP_REQUIRES = (
+SETUP_REQUIRES = (
     'sphinx>=1.3',
-) + _INSTALL_REQUIRES
+) + INSTALL_REQUIRES
 
-_COMMAND_CLASS = {
+COMMAND_CLASS = {
     'doc': commands.SphinxDocumentation,
+    'build_proto_modules': commands.BuildProtoModules,
     'build_project_metadata': commands.BuildProjectMetadata,
     'build_py': commands.BuildPy,
+    'gather': commands.Gather,
+    'run_interop': commands.RunInterop,
+}
+
+TEST_PACKAGE_DATA = {
+    'tests.interop': [
+        'credentials/ca.pem',
+        'credentials/server1.key',
+        'credentials/server1.pem',
+    ],
+    'tests.protoc_plugin': [
+        'protoc_plugin_test.proto',
+    ],
+    'tests.unit': [
+        'credentials/ca.pem',
+        'credentials/server1.key',
+        'credentials/server1.pem',
+    ],
 }
 
+TESTS_REQUIRE = (
+    'oauth2client>=1.4.7',
+    'protobuf==3.0.0a3',
+    'coverage>=4.0',
+) + INSTALL_REQUIRES
+
+TEST_SUITE = 'tests'
+TEST_LOADER = 'tests:Loader'
+TEST_RUNNER = 'tests:Runner'
+
+PACKAGE_DATA = {}
+if INSTALL_TESTS:
+  PACKAGE_DATA = dict(PACKAGE_DATA, **TEST_PACKAGE_DATA)
+  PACKAGES = setuptools.find_packages('.')
+else:
+  PACKAGES = setuptools.find_packages('.', exclude=['tests', 'tests.*'])
+
 setuptools.setup(
     name='grpcio',
-    version='0.11.0b1',
-    ext_modules=_EXTENSION_MODULES + _CYTHON_EXTENSION_MODULES,
-    packages=list(_PACKAGES),
-    package_dir=_PACKAGE_DIRECTORIES,
-    install_requires=_INSTALL_REQUIRES,
-    setup_requires=_SETUP_REQUIRES,
-    cmdclass=_COMMAND_CLASS
+    version='0.11.0b2',
+    ext_modules=EXTENSION_MODULES + CYTHON_EXTENSION_MODULES,
+    packages=list(PACKAGES),
+    package_dir=PACKAGE_DIRECTORIES,
+    install_requires=INSTALL_REQUIRES,
+    setup_requires=SETUP_REQUIRES,
+    cmdclass=COMMAND_CLASS,
+    tests_require=TESTS_REQUIRE,
+    test_suite=TEST_SUITE,
+    test_loader=TEST_LOADER,
+    test_runner=TEST_RUNNER,
 )
diff --git a/src/python/grpcio_test/setup.py b/src/python/grpcio/tests/__init__.py
index e9ee45a92a..b76b3985a1 100644
--- a/src/python/grpcio_test/setup.py
+++ b/src/python/grpcio/tests/__init__.py
@@ -27,68 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"""A setup module for the GRPC Python interop testing package."""
+from tests import _loader
+from tests import _runner
 
-import os
-import os.path
-
-import setuptools
-
-# Ensure we're in the proper directory whether or not we're being used by pip.
-os.chdir(os.path.dirname(os.path.abspath(__file__)))
-
-# Break import-style to ensure we can actually find our commands module.
-import commands
-
-_PACKAGES = setuptools.find_packages('.')
-
-_PACKAGE_DIRECTORIES = {
-    '': '.',
-}
-
-_PACKAGE_DATA = {
-    'grpc_interop': [
-        'credentials/ca.pem',
-        'credentials/server1.key',
-        'credentials/server1.pem',
-    ],
-    'grpc_protoc_plugin': [
-        'test.proto',
-    ],
-    'grpc_test': [
-        'credentials/ca.pem',
-        'credentials/server1.key',
-        'credentials/server1.pem',
-    ],
-}
-
-_SETUP_REQUIRES = (
-    'pytest>=2.6',
-    'pytest-cov>=2.0',
-    'pytest-xdist>=1.11',
-    'pytest-timeout>=0.5',
-)
-
-_INSTALL_REQUIRES = (
-    'oauth2client>=1.4.7',
-    'grpcio>=0.11.0b0',
-    # TODO(issue 3321): Unpin protobuf dependency.
-    'protobuf==3.0.0a3',
-)
-
-_COMMAND_CLASS = {
-    'test': commands.RunTests,
-    'build_proto_modules': commands.BuildProtoModules,
-    'build_py': commands.BuildPy,
-}
-
-setuptools.setup(
-    name='grpcio_test',
-    version='0.11.0b0',
-    packages=_PACKAGES,
-    package_dir=_PACKAGE_DIRECTORIES,
-    package_data=_PACKAGE_DATA,
-    install_requires=_INSTALL_REQUIRES + _SETUP_REQUIRES,
-    setup_requires=_SETUP_REQUIRES,
-    cmdclass=_COMMAND_CLASS,
-)
+Loader = _loader.Loader
+Runner = _runner.Runner
diff --git a/src/python/grpcio/tests/_loader.py b/src/python/grpcio/tests/_loader.py
new file mode 100644
index 0000000000..6992029b5e
--- /dev/null
+++ b/src/python/grpcio/tests/_loader.py
@@ -0,0 +1,119 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import importlib
+import pkgutil
+import re
+import unittest
+
+import coverage
+
+TEST_MODULE_REGEX = r'^.*_test$'
+
+
+class Loader(object):
+  """Test loader for setuptools test suite support.
+
+  Attributes:
+    suite (unittest.TestSuite): All tests collected by the loader.
+    loader (unittest.TestLoader): Standard Python unittest loader to be ran per
+      module discovered.
+    module_matcher (re.RegexObject): A regular expression object to match
+      against module names and determine whether or not the discovered module
+      contributes to the test suite.
+  """
+
+  def __init__(self):
+    self.suite = unittest.TestSuite()
+    self.loader = unittest.TestLoader()
+    self.module_matcher = re.compile(TEST_MODULE_REGEX)
+
+  def loadTestsFromNames(self, names, module=None):
+    """Function mirroring TestLoader::loadTestsFromNames, as expected by
+    setuptools.setup argument `test_loader`."""
+    # ensure that we capture decorators and definitions (else our coverage
+    # measure unnecessarily suffers)
+    coverage_context = coverage.Coverage(data_suffix=True)
+    coverage_context.start()
+    modules = [importlib.import_module(name) for name in names]
+    for module in modules:
+      self.visit_module(module)
+    for module in modules:
+      try:
+        package_paths = module.__path__
+      except:
+        continue
+      self.walk_packages(package_paths)
+    coverage_context.stop()
+    coverage_context.save()
+    return self.suite
+
+  def walk_packages(self, package_paths):
+    """Walks over the packages, dispatching `visit_module` calls.
+
+    Args:
+      package_paths (list): A list of paths over which to walk through modules
+        along.
+    """
+    for importer, module_name, is_package in (
+        pkgutil.iter_modules(package_paths)):
+      module = importer.find_module(module_name).load_module(module_name)
+      self.visit_module(module)
+      if is_package:
+        self.walk_packages(module.__path__)
+
+  def visit_module(self, module):
+    """Visits the module, adding discovered tests to the test suite.
+
+    Args:
+      module (module): Module to match against self.module_matcher; if matched
+        it has its tests loaded via self.loader into self.suite.
+    """
+    if self.module_matcher.match(module.__name__):
+      module_suite = self.loader.loadTestsFromModule(module)
+      self.suite.addTest(module_suite)
+
+
+def iterate_suite_cases(suite):
+  """Generator over all unittest.TestCases in a unittest.TestSuite.
+
+  Args:
+    suite (unittest.TestSuite): Suite to iterate over in the generator.
+
+  Returns:
+    generator: A generator over all unittest.TestCases in `suite`.
+  """
+  for item in suite:
+    if isinstance(item, unittest.TestSuite):
+      for child_item in iterate_suite_cases(item):
+        yield child_item
+    elif isinstance(item, unittest.TestCase):
+      yield item
+    else:
+      raise ValueError('unexpected suite item of type {}'.format(type(item)))
diff --git a/src/python/grpcio/tests/_result.py b/src/python/grpcio/tests/_result.py
new file mode 100644
index 0000000000..5a570f4279
--- /dev/null
+++ b/src/python/grpcio/tests/_result.py
@@ -0,0 +1,451 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import cStringIO as StringIO
+import collections
+import itertools
+import traceback
+import unittest
+from xml.etree import ElementTree
+
+import coverage
+
+from tests import _loader
+
+
+class CaseResult(collections.namedtuple('CaseResult', [
+    'id', 'name', 'kind', 'stdout', 'stderr', 'skip_reason', 'traceback'])):
+  """A serializable result of a single test case.
+
+  Attributes:
+    id (object): Any serializable object used to denote the identity of this
+      test case.
+    name (str or None): A human-readable name of the test case.
+    kind (CaseResult.Kind): The kind of test result.
+    stdout (object or None): Output on stdout, or None if nothing was captured.
+    stderr (object or None): Output on stderr, or None if nothing was captured.
+    skip_reason (object or None): The reason the test was skipped. Must be
+      something if self.kind is CaseResult.Kind.SKIP, else None.
+    traceback (object or None): The traceback of the test. Must be something if
+      self.kind is CaseResult.Kind.{ERROR, FAILURE, EXPECTED_FAILURE}, else
+      None.
+  """
+
+  class Kind:
+    UNTESTED = 'untested'
+    RUNNING = 'running'
+    ERROR = 'error'
+    FAILURE = 'failure'
+    SUCCESS = 'success'
+    SKIP = 'skip'
+    EXPECTED_FAILURE = 'expected failure'
+    UNEXPECTED_SUCCESS = 'unexpected success'
+
+  def __new__(cls, id=None, name=None, kind=None, stdout=None, stderr=None,
+              skip_reason=None, traceback=None):
+    """Helper keyword constructor for the namedtuple.
+
+    See this class' attributes for information on the arguments."""
+    assert id is not None
+    assert name is None or isinstance(name, str)
+    if kind is CaseResult.Kind.UNTESTED:
+      pass
+    elif kind is CaseResult.Kind.RUNNING:
+      pass
+    elif kind is CaseResult.Kind.ERROR:
+      assert traceback is not None
+    elif kind is CaseResult.Kind.FAILURE:
+      assert traceback is not None
+    elif kind is CaseResult.Kind.SUCCESS:
+      pass
+    elif kind is CaseResult.Kind.SKIP:
+      assert skip_reason is not None
+    elif kind is CaseResult.Kind.EXPECTED_FAILURE:
+      assert traceback is not None
+    elif kind is CaseResult.Kind.UNEXPECTED_SUCCESS:
+      pass
+    else:
+      assert False
+    return super(cls, CaseResult).__new__(
+        cls, id, name, kind, stdout, stderr, skip_reason, traceback)
+
+  def updated(self, name=None, kind=None, stdout=None, stderr=None,
+              skip_reason=None, traceback=None):
+    """Get a new validated CaseResult with the fields updated.
+
+    See this class' attributes for information on the arguments."""
+    name = self.name if name is None else name
+    kind = self.kind if kind is None else kind
+    stdout = self.stdout if stdout is None else stdout
+    stderr = self.stderr if stderr is None else stderr
+    skip_reason = self.skip_reason if skip_reason is None else skip_reason
+    traceback = self.traceback if traceback is None else traceback
+    return CaseResult(id=self.id, name=name, kind=kind, stdout=stdout,
+                      stderr=stderr, skip_reason=skip_reason,
+                      traceback=traceback)
+
+
+class AugmentedResult(unittest.TestResult):
+  """unittest.Result that keeps track of additional information.
+
+  Uses CaseResult objects to store test-case results, providing additional
+  information beyond that of the standard Python unittest library, such as
+  standard output.
+
+  Attributes:
+    id_map (callable): A unary callable mapping unittest.TestCase objects to
+      unique identifiers.
+    cases (dict): A dictionary mapping from the identifiers returned by id_map
+      to CaseResult objects corresponding to those IDs.
+  """
+
+  def __init__(self, id_map):
+    """Initialize the object with an identifier mapping.
+
+    Arguments:
+      id_map (callable): Corresponds to the attribute `id_map`."""
+    super(AugmentedResult, self).__init__()
+    self.id_map = id_map
+    self.cases = None
+
+  def startTestRun(self):
+    """See unittest.TestResult.startTestRun."""
+    super(AugmentedResult, self).startTestRun()
+    self.cases = dict()
+
+  def stopTestRun(self):
+    """See unittest.TestResult.stopTestRun."""
+    super(AugmentedResult, self).stopTestRun()
+
+  def startTest(self, test):
+    """See unittest.TestResult.startTest."""
+    super(AugmentedResult, self).startTest(test)
+    case_id = self.id_map(test)
+    self.cases[case_id] = CaseResult(
+        id=case_id, name=test.id(), kind=CaseResult.Kind.RUNNING)
+
+  def addError(self, test, error):
+    """See unittest.TestResult.addError."""
+    super(AugmentedResult, self).addError(test, error)
+    case_id = self.id_map(test)
+    self.cases[case_id] = self.cases[case_id].updated(
+        kind=CaseResult.Kind.ERROR, traceback=error)
+
+  def addFailure(self, test, error):
+    """See unittest.TestResult.addFailure."""
+    super(AugmentedResult, self).addFailure(test, error)
+    case_id = self.id_map(test)
+    self.cases[case_id] = self.cases[case_id].updated(
+        kind=CaseResult.Kind.FAILURE, traceback=error)
+
+  def addSuccess(self, test):
+    """See unittest.TestResult.addSuccess."""
+    super(AugmentedResult, self).addSuccess(test)
+    case_id = self.id_map(test)
+    self.cases[case_id] = self.cases[case_id].updated(
+        kind=CaseResult.Kind.SUCCESS)
+
+  def addSkip(self, test, reason):
+    """See unittest.TestResult.addSkip."""
+    super(AugmentedResult, self).addSkip(test, reason)
+    case_id = self.id_map(test)
+    self.cases[case_id] = self.cases[case_id].updated(
+        kind=CaseResult.Kind.SKIP, skip_reason=reason)
+
+  def addExpectedFailure(self, test, error):
+    """See unittest.TestResult.addExpectedFailure."""
+    super(AugmentedResult, self).addExpectedFailure(test, error)
+    case_id = self.id_map(test)
+    self.cases[case_id] = self.cases[case_id].updated(
+        kind=CaseResult.Kind.EXPECTED_FAILURE, traceback=error)
+
+  def addUnexpectedSuccess(self, test):
+    """See unittest.TestResult.addUnexpectedSuccess."""
+    super(AugmentedResult, self).addUnexpectedSuccess(test)
+    case_id = self.id_map(test)
+    self.cases[case_id] = self.cases[case_id].updated(
+        kind=CaseResult.Kind.UNEXPECTED_SUCCESS)
+
+  def set_output(self, test, stdout, stderr):
+    """Set the output attributes for the CaseResult corresponding to a test.
+
+    Args:
+      test (unittest.TestCase): The TestCase to set the outputs of.
+      stdout (str): Output from stdout to assign to self.id_map(test).
+      stderr (str): Output from stderr to assign to self.id_map(test).
+    """
+    case_id = self.id_map(test)
+    self.cases[case_id] = self.cases[case_id].updated(
+        stdout=stdout, stderr=stderr)
+
+  def augmented_results(self, filter):
+    """Convenience method to retrieve filtered case results.
+
+    Args:
+      filter (callable): A unary predicate to filter over CaseResult objects.
+    """
+    return (self.cases[case_id] for case_id in self.cases
+            if filter(self.cases[case_id]))
+
+
+class CoverageResult(AugmentedResult):
+  """Extension to AugmentedResult adding coverage.py support per test.\
+
+  Attributes:
+    coverage_context (coverage.Coverage): coverage.py management object.
+  """
+
+  def __init__(self, id_map):
+    """See AugmentedResult.__init__."""
+    super(CoverageResult, self).__init__(id_map=id_map)
+    self.coverage_context = None
+
+  def startTest(self, test):
+    """See unittest.TestResult.startTest.
+
+    Additionally initializes and begins code coverage tracking."""
+    super(CoverageResult, self).startTest(test)
+    self.coverage_context = coverage.Coverage(data_suffix=True)
+    self.coverage_context.start()
+
+  def stopTest(self, test):
+    """See unittest.TestResult.stopTest.
+
+    Additionally stops and deinitializes code coverage tracking."""
+    super(CoverageResult, self).stopTest(test)
+    self.coverage_context.stop()
+    self.coverage_context.save()
+    self.coverage_context = None
+
+  def stopTestRun(self):
+    """See unittest.TestResult.stopTestRun."""
+    super(CoverageResult, self).stopTestRun()
+    # TODO(atash): Dig deeper into why the following line fails to properly
+    # combine coverage data from the Cython plugin.
+    #coverage.Coverage().combine()
+
+
+class _Colors:
+  """Namespaced constants for terminal color magic numbers."""
+  HEADER = '\033[95m'
+  INFO = '\033[94m'
+  OK = '\033[92m'
+  WARN = '\033[93m'
+  FAIL = '\033[91m'
+  BOLD = '\033[1m'
+  UNDERLINE = '\033[4m'
+  END = '\033[0m'
+
+
+class TerminalResult(CoverageResult):
+  """Extension to CoverageResult adding basic terminal reporting."""
+
+  def __init__(self, out, id_map):
+    """Initialize the result object.
+
+    Args:
+      out (file-like): Output file to which terminal-colored live results will
+        be written.
+      id_map (callable): See AugmentedResult.__init__.
+    """
+    super(TerminalResult, self).__init__(id_map=id_map)
+    self.out = out
+
+  def startTestRun(self):
+    """See unittest.TestResult.startTestRun."""
+    super(TerminalResult, self).startTestRun()
+    self.out.write(
+        _Colors.HEADER +
+        'Testing gRPC Python...\n' +
+        _Colors.END)
+
+  def stopTestRun(self):
+    """See unittest.TestResult.stopTestRun."""
+    super(TerminalResult, self).stopTestRun()
+    self.out.write(summary(self))
+    self.out.flush()
+
+  def addError(self, test, error):
+    """See unittest.TestResult.addError."""
+    super(TerminalResult, self).addError(test, error)
+    self.out.write(
+        _Colors.FAIL +
+        'ERROR         {}\n'.format(test.id()) +
+        _Colors.END)
+    self.out.flush()
+
+  def addFailure(self, test, error):
+    """See unittest.TestResult.addFailure."""
+    super(TerminalResult, self).addFailure(test, error)
+    self.out.write(
+        _Colors.FAIL +
+        'FAILURE       {}\n'.format(test.id()) +
+        _Colors.END)
+    self.out.flush()
+
+  def addSuccess(self, test):
+    """See unittest.TestResult.addSuccess."""
+    super(TerminalResult, self).addSuccess(test)
+    self.out.write(
+        _Colors.OK +
+        'SUCCESS       {}\n'.format(test.id()) +
+        _Colors.END)
+    self.out.flush()
+
+  def addSkip(self, test, reason):
+    """See unittest.TestResult.addSkip."""
+    super(TerminalResult, self).addSkip(test, reason)
+    self.out.write(
+        _Colors.INFO +
+        'SKIP          {}\n'.format(test.id()) +
+        _Colors.END)
+    self.out.flush()
+
+  def addExpectedFailure(self, test, error):
+    """See unittest.TestResult.addExpectedFailure."""
+    super(TerminalResult, self).addExpectedFailure(test, error)
+    self.out.write(
+        _Colors.INFO +
+        'FAILURE_OK    {}\n'.format(test.id()) +
+        _Colors.END)
+    self.out.flush()
+
+  def addUnexpectedSuccess(self, test):
+    """See unittest.TestResult.addUnexpectedSuccess."""
+    super(TerminalResult, self).addUnexpectedSuccess(test)
+    self.out.write(
+        _Colors.INFO +
+        'UNEXPECTED_OK {}\n'.format(test.id()) +
+        _Colors.END)
+    self.out.flush()
+
+def _traceback_string(type, value, trace):
+  """Generate a descriptive string of a Python exception traceback.
+
+  Args:
+    type (class): The type of the exception.
+    value (Exception): The value of the exception.
+    trace (traceback): Traceback of the exception.
+
+  Returns:
+    str: Formatted exception descriptive string.
+  """
+  buffer = StringIO.StringIO()
+  traceback.print_exception(type, value, trace, file=buffer)
+  return buffer.getvalue()
+
+def summary(result):
+  """A summary string of a result object.
+
+  Args:
+    result (AugmentedResult): The result object to get the summary of.
+
+  Returns:
+    str: The summary string.
+  """
+  assert isinstance(result, AugmentedResult)
+  untested = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.UNTESTED))
+  running = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.RUNNING))
+  failures = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.FAILURE))
+  errors = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.ERROR))
+  successes = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.SUCCESS))
+  skips = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.SKIP))
+  expected_failures = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.EXPECTED_FAILURE))
+  unexpected_successes = list(result.augmented_results(
+      lambda case_result: case_result.kind is CaseResult.Kind.UNEXPECTED_SUCCESS))
+  running_names = [case.name for case in running]
+  finished_count = (len(failures) + len(errors) + len(successes) +
+                    len(expected_failures) + len(unexpected_successes))
+  statistics = (
+      '{finished} tests finished:\n'
+      '\t{successful} successful\n'
+      '\t{unsuccessful} unsuccessful\n'
+      '\t{skipped} skipped\n'
+      '\t{expected_fail} expected failures\n'
+      '\t{unexpected_successful} unexpected successes\n'
+      'Interrupted Tests:\n'
+      '\t{interrupted}\n'
+      .format(finished=finished_count,
+              successful=len(successes),
+              unsuccessful=(len(failures)+len(errors)),
+              skipped=len(skips),
+              expected_fail=len(expected_failures),
+              unexpected_successful=len(unexpected_successes),
+              interrupted=str(running_names)))
+  tracebacks = '\n\n'.join([
+      (_Colors.FAIL + '{test_name}' + _Colors.END + + '\n' +
+       _Colors.BOLD + 'traceback:' + _Colors.END + '\n' +
+       '{traceback}\n' +
+       _Colors.BOLD + 'stdout:' + _Colors.END + '\n' +
+       '{stdout}\n' +
+       _Colors.BOLD + 'stderr:' + _Colors.END + '\n' +
+       '{stderr}\n').format(
+           test_name=result.name,
+           traceback=_traceback_string(*result.traceback),
+           stdout=result.stdout, stderr=result.stderr)
+      for result in itertools.chain(failures, errors)
+  ])
+  notes = 'Unexpected successes: {}\n'.format([
+      result.name for result in unexpected_successes])
+  return statistics + '\nErrors/Failures: \n' + tracebacks + '\n' + notes
+
+
+def jenkins_junit_xml(result):
+  """An XML tree object that when written is recognizable by Jenkins.
+
+  Args:
+    result (AugmentedResult): The result object to get the junit xml output of.
+
+  Returns:
+    ElementTree.ElementTree: The XML tree.
+  """
+  assert isinstance(result, AugmentedResult)
+  root = ElementTree.Element('testsuites')
+  suite = ElementTree.SubElement(root, 'testsuite', {
+      'name': 'Python gRPC tests',
+  })
+  for case in result.cases.values():
+    if case.kind is CaseResult.Kind.SUCCESS:
+      ElementTree.SubElement(suite, 'testcase', {
+          'name': case.name,
+      })
+    elif case.kind in (CaseResult.Kind.ERROR, CaseResult.Kind.FAILURE):
+      case_xml = ElementTree.SubElement(suite, 'testcase', {
+          'name': case.name,
+      })
+      error_xml = ElementTree.SubElement(case_xml, 'error', {})
+      error_xml.text = ''.format(case.stderr, case.traceback)
+  return ElementTree.ElementTree(element=root)
diff --git a/src/python/grpcio/tests/_runner.py b/src/python/grpcio/tests/_runner.py
new file mode 100644
index 0000000000..4f1ddb57fc
--- /dev/null
+++ b/src/python/grpcio/tests/_runner.py
@@ -0,0 +1,224 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import cStringIO as StringIO
+import collections
+import fcntl
+import multiprocessing
+import os
+import select
+import signal
+import sys
+import threading
+import time
+import unittest
+import uuid
+
+from tests import _loader
+from tests import _result
+
+
+class CapturePipe(object):
+  """A context-manager pipe to redirect output to a byte array.
+
+  Attributes:
+    _redirect_fd (int): File descriptor of file to redirect writes from.
+    _saved_fd (int): A copy of the original value of the redirected file
+      descriptor.
+    _read_thread (threading.Thread or None): Thread upon which reads through the
+      pipe are performed. Only non-None when self is started.
+    _read_fd (int or None): File descriptor of the read end of the redirect
+      pipe. Only non-None when self is started.
+    _write_fd (int or None): File descriptor of the write end of the redirect
+      pipe. Only non-None when self is started.
+    output (bytearray or None): Redirected output from writes to the redirected
+      file descriptor. Only valid during and after self has started.
+  """
+
+  def __init__(self, fd):
+    self._redirect_fd = fd
+    self._saved_fd = os.dup(self._redirect_fd)
+    self._read_thread = None
+    self._read_fd = None
+    self._write_fd = None
+    self.output = None
+
+  def start(self):
+    """Start redirection of writes to the file descriptor."""
+    self._read_fd, self._write_fd = os.pipe()
+    os.dup2(self._write_fd, self._redirect_fd)
+    flags = fcntl.fcntl(self._read_fd, fcntl.F_GETFL)
+    fcntl.fcntl(self._read_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
+    self._read_thread = threading.Thread(target=self._read)
+    self._read_thread.start()
+
+  def stop(self):
+    """Stop redirection of writes to the file descriptor."""
+    os.close(self._write_fd)
+    os.dup2(self._saved_fd, self._redirect_fd)  # auto-close self._redirect_fd
+    self._read_thread.join()
+    self._read_thread = None
+    # we waited for the read thread to finish, so _read_fd has been read and we
+    # can close it.
+    os.close(self._read_fd)
+
+  def _read(self):
+    """Read-thread target for self."""
+    self.output = bytearray()
+    while True:
+      select.select([self._read_fd], [], [])
+      read_bytes = os.read(self._read_fd, 1024)
+      if read_bytes:
+        self.output.extend(read_bytes)
+      else:
+        break
+
+  def write_bypass(self, value):
+    """Bypass the redirection and write directly to the original file.
+
+    Arguments:
+      value (str): What to write to the original file.
+    """
+    if self._saved_fd is None:
+      os.write(self._redirect_fd, value)
+    else:
+      os.write(self._saved_fd, value)
+
+  def __enter__(self):
+    self.start()
+    return self
+
+  def __exit__(self, type, value, traceback):
+    self.stop()
+
+  def close(self):
+    """Close any resources used by self not closed by stop()."""
+    os.close(self._saved_fd)
+
+
+class AugmentedCase(collections.namedtuple('AugmentedCase', [
+    'case', 'id'])):
+  """A test case with a guaranteed unique externally specified identifier.
+
+  Attributes:
+    case (unittest.TestCase): TestCase we're decorating with an additional
+      identifier.
+    id (object): Any identifier that may be considered 'unique' for testing
+      purposes.
+  """
+
+  def __new__(cls, case, id=None):
+    if id is None:
+      id = uuid.uuid4()
+    return super(cls, AugmentedCase).__new__(cls, case, id)
+
+
+class Runner(object):
+
+  def run(self, suite):
+    """See setuptools' test_runner setup argument for information."""
+    # Ensure that every test case has no collision with any other test case in
+    # the augmented results.
+    augmented_cases = [AugmentedCase(case, uuid.uuid4())
+                       for case in _loader.iterate_suite_cases(suite)]
+    case_id_by_case = dict((augmented_case.case, augmented_case.id)
+                           for augmented_case in augmented_cases)
+    result_out = StringIO.StringIO()
+    result = _result.TerminalResult(
+        result_out, id_map=lambda case: case_id_by_case[case])
+    stdout_pipe = CapturePipe(sys.stdout.fileno())
+    stderr_pipe = CapturePipe(sys.stderr.fileno())
+    kill_flag = [False]
+
+    def sigint_handler(signal_number, frame):
+      if signal_number == signal.SIGINT:
+        kill_flag[0] = True  # Python 2.7 not having 'local'... :-(
+      signal.signal(signal_number, signal.SIG_DFL)
+
+    def fault_handler(signal_number, frame):
+      stdout_pipe.write_bypass(
+          'Received fault signal {}\nstdout:\n{}\n\nstderr:{}\n'
+          .format(signal_number, stdout_pipe.output, stderr_pipe.output))
+      os._exit(1)
+
+    def check_kill_self():
+      if kill_flag[0]:
+        stdout_pipe.write_bypass('Stopping tests short...')
+        result.stopTestRun()
+        stdout_pipe.write_bypass(result_out.getvalue())
+        stdout_pipe.write_bypass(
+            '\ninterrupted stdout:\n{}\n'.format(stdout_pipe.output))
+        stderr_pipe.write_bypass(
+            '\ninterrupted stderr:\n{}\n'.format(stderr_pipe.output))
+        os._exit(1)
+    signal.signal(signal.SIGINT, sigint_handler)
+    signal.signal(signal.SIGSEGV, fault_handler)
+    signal.signal(signal.SIGBUS, fault_handler)
+    signal.signal(signal.SIGABRT, fault_handler)
+    signal.signal(signal.SIGFPE, fault_handler)
+    signal.signal(signal.SIGILL, fault_handler)
+    # Sometimes output will lag after a test has successfully finished; we
+    # ignore such writes to our pipes.
+    signal.signal(signal.SIGPIPE, signal.SIG_IGN)
+
+    # Run the tests
+    result.startTestRun()
+    for augmented_case in augmented_cases:
+      sys.stdout.write('Running       {}\n'.format(augmented_case.case.id()))
+      sys.stdout.flush()
+      case_thread = threading.Thread(
+          target=augmented_case.case.run, args=(result,))
+      try:
+        with stdout_pipe, stderr_pipe:
+          case_thread.start()
+          while case_thread.is_alive():
+            check_kill_self()
+            time.sleep(0)
+          case_thread.join()
+      except:
+        # re-raise the exception after forcing the with-block to end
+        raise
+      result.set_output(
+          augmented_case.case, stdout_pipe.output, stderr_pipe.output)
+      sys.stdout.write(result_out.getvalue())
+      sys.stdout.flush()
+      result_out.truncate(0)
+      check_kill_self()
+    result.stopTestRun()
+    stdout_pipe.close()
+    stderr_pipe.close()
+
+    # Report results
+    sys.stdout.write(result_out.getvalue())
+    sys.stdout.flush()
+    signal.signal(signal.SIGINT, signal.SIG_DFL)
+    with open('report.xml', 'w') as report_xml_file:
+      _result.jenkins_junit_xml(result).write(report_xml_file)
+    return result
+
diff --git a/src/python/grpcio_test/grpc_interop/__init__.py b/src/python/grpcio/tests/interop/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_interop/__init__.py
+++ b/src/python/grpcio/tests/interop/__init__.py
diff --git a/src/python/grpcio_test/grpc_interop/_insecure_interop_test.py b/src/python/grpcio/tests/interop/_insecure_interop_test.py
index 5007be28ff..00b49aba37 100644
--- a/src/python/grpcio_test/grpc_interop/_insecure_interop_test.py
+++ b/src/python/grpcio/tests/interop/_insecure_interop_test.py
@@ -33,10 +33,10 @@ import unittest
 
 from grpc.beta import implementations
 
-from grpc_interop import _interop_test_case
-from grpc_interop import methods
-from grpc_interop import server
-from grpc_interop import test_pb2
+from tests.interop import _interop_test_case
+from tests.interop import methods
+from tests.interop import server
+from tests.interop import test_pb2
 
 
 class InsecureInteropTest(
diff --git a/src/python/grpcio_test/grpc_interop/_interop_test_case.py b/src/python/grpcio/tests/interop/_interop_test_case.py
index b6d06b300d..ccea17a66d 100644
--- a/src/python/grpcio_test/grpc_interop/_interop_test_case.py
+++ b/src/python/grpcio/tests/interop/_interop_test_case.py
@@ -29,7 +29,7 @@
 
 """Common code for unit tests of the interoperability test code."""
 
-from grpc_interop import methods
+from tests.interop import methods
 
 
 class InteropTestCase(object):
diff --git a/src/python/grpcio_test/grpc_interop/_secure_interop_test.py b/src/python/grpcio/tests/interop/_secure_interop_test.py
index 108e15b0f9..a0fef1fc20 100644
--- a/src/python/grpcio_test/grpc_interop/_secure_interop_test.py
+++ b/src/python/grpcio/tests/interop/_secure_interop_test.py
@@ -33,12 +33,12 @@ import unittest
 
 from grpc.beta import implementations
 
-from grpc_test.beta import test_utilities
+from tests.interop import _interop_test_case
+from tests.interop import methods
+from tests.interop import resources
+from tests.interop import test_pb2
 
-from grpc_interop import _interop_test_case
-from grpc_interop import methods
-from grpc_interop import resources
-from grpc_interop import test_pb2
+from tests.unit.beta import test_utilities
 
 _SERVER_HOST_OVERRIDE = 'foo.test.google.fr'
 
diff --git a/src/python/grpcio_test/grpc_interop/client.py b/src/python/grpcio/tests/interop/client.py
index b8d5047ca5..9449ff5429 100644
--- a/src/python/grpcio_test/grpc_interop/client.py
+++ b/src/python/grpcio/tests/interop/client.py
@@ -34,11 +34,10 @@ from oauth2client import client as oauth2client_client
 
 from grpc.beta import implementations
 
-from grpc_test.beta import test_utilities
-
-from grpc_interop import methods
-from grpc_interop import resources
-from grpc_interop import test_pb2
+from tests.interop import methods
+from tests.interop import resources
+from tests.interop import test_pb2
+from tests.unit.beta import test_utilities
 
 _ONE_DAY_IN_SECONDS = 60 * 60 * 24
 
@@ -114,7 +113,7 @@ def _test_case_from_arg(test_case_arg):
     raise ValueError('No test case "%s"!' % test_case_arg)
 
 
-def _test_interoperability():
+def test_interoperability():
   args = _args()
   stub = _stub(args)
   test_case = _test_case_from_arg(args.test_case)
@@ -122,4 +121,4 @@ def _test_interoperability():
 
 
 if __name__ == '__main__':
-  _test_interoperability()
+  test_interoperability()
diff --git a/src/python/grpcio_test/grpc_interop/credentials/README b/src/python/grpcio/tests/interop/credentials/README
index cb20dcb49f..cb20dcb49f 100644
--- a/src/python/grpcio_test/grpc_interop/credentials/README
+++ b/src/python/grpcio/tests/interop/credentials/README
diff --git a/src/python/grpcio_test/grpc_interop/credentials/ca.pem b/src/python/grpcio/tests/interop/credentials/ca.pem
index 6c8511a73c..6c8511a73c 100755
--- a/src/python/grpcio_test/grpc_interop/credentials/ca.pem
+++ b/src/python/grpcio/tests/interop/credentials/ca.pem
diff --git a/src/python/grpcio_test/grpc_interop/credentials/server1.key b/src/python/grpcio/tests/interop/credentials/server1.key
index 143a5b8765..143a5b8765 100755
--- a/src/python/grpcio_test/grpc_interop/credentials/server1.key
+++ b/src/python/grpcio/tests/interop/credentials/server1.key
diff --git a/src/python/grpcio_test/grpc_interop/credentials/server1.pem b/src/python/grpcio/tests/interop/credentials/server1.pem
index f3d43fcc5b..f3d43fcc5b 100755
--- a/src/python/grpcio_test/grpc_interop/credentials/server1.pem
+++ b/src/python/grpcio/tests/interop/credentials/server1.pem
diff --git a/src/python/grpcio_test/grpc_interop/empty.proto b/src/python/grpcio/tests/interop/empty.proto
index 6d0eb937d6..6d0eb937d6 100644
--- a/src/python/grpcio_test/grpc_interop/empty.proto
+++ b/src/python/grpcio/tests/interop/empty.proto
diff --git a/src/python/grpcio_test/grpc_interop/messages.proto b/src/python/grpcio/tests/interop/messages.proto
index 193b6c4171..193b6c4171 100644
--- a/src/python/grpcio_test/grpc_interop/messages.proto
+++ b/src/python/grpcio/tests/interop/messages.proto
diff --git a/src/python/grpcio_test/grpc_interop/methods.py b/src/python/grpcio/tests/interop/methods.py
index 3ef8545355..b3591aef7b 100644
--- a/src/python/grpcio_test/grpc_interop/methods.py
+++ b/src/python/grpcio/tests/interop/methods.py
@@ -40,9 +40,9 @@ from oauth2client import client as oauth2client_client
 from grpc.framework.common import cardinality
 from grpc.framework.interfaces.face import face
 
-from grpc_interop import empty_pb2
-from grpc_interop import messages_pb2
-from grpc_interop import test_pb2
+from tests.interop import empty_pb2
+from tests.interop import messages_pb2
+from tests.interop import test_pb2
 
 _TIMEOUT = 7
 
diff --git a/src/python/grpcio_test/grpc_interop/resources.py b/src/python/grpcio/tests/interop/resources.py
index 1122499418..1122499418 100644
--- a/src/python/grpcio_test/grpc_interop/resources.py
+++ b/src/python/grpcio/tests/interop/resources.py
diff --git a/src/python/grpcio_test/grpc_interop/server.py b/src/python/grpcio/tests/interop/server.py
index b541087663..6dd55f008c 100644
--- a/src/python/grpcio_test/grpc_interop/server.py
+++ b/src/python/grpcio/tests/interop/server.py
@@ -35,9 +35,9 @@ import time
 
 from grpc.beta import implementations
 
-from grpc_interop import methods
-from grpc_interop import resources
-from grpc_interop import test_pb2
+from tests.interop import methods
+from tests.interop import resources
+from tests.interop import test_pb2
 
 _ONE_DAY_IN_SECONDS = 60 * 60 * 24
 
@@ -68,7 +68,7 @@ def serve():
       time.sleep(_ONE_DAY_IN_SECONDS)
   except BaseException as e:
     logging.info('Caught exception "%s"; stopping server...', e)
-    server.stop()
+    server.stop(0)
     logging.info('Server stopped; exiting.')
 
 if __name__ == '__main__':
diff --git a/src/python/grpcio_test/grpc_interop/test.proto b/src/python/grpcio/tests/interop/test.proto
index b499813e56..9feecc0278 100644
--- a/src/python/grpcio_test/grpc_interop/test.proto
+++ b/src/python/grpcio/tests/interop/test.proto
@@ -33,8 +33,8 @@
 
 syntax = "proto3";
 
-import "grpc_interop/empty.proto";
-import "grpc_interop/messages.proto";
+import "tests/interop/empty.proto";
+import "tests/interop/messages.proto";
 
 package grpc.testing;
 
diff --git a/src/python/grpcio_test/grpc_protoc_plugin/__init__.py b/src/python/grpcio/tests/protoc_plugin/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_protoc_plugin/__init__.py
+++ b/src/python/grpcio/tests/protoc_plugin/__init__.py
diff --git a/src/python/grpcio_test/grpc_protoc_plugin/beta_python_plugin_test.py b/src/python/grpcio/tests/protoc_plugin/beta_python_plugin_test.py
index 259b978de2..ba5b219a88 100644
--- a/src/python/grpcio_test/grpc_protoc_plugin/beta_python_plugin_test.py
+++ b/src/python/grpcio/tests/protoc_plugin/beta_python_plugin_test.py
@@ -45,7 +45,7 @@ import unittest
 from grpc.beta import implementations
 from grpc.framework.foundation import future
 from grpc.framework.interfaces.face import face
-from grpc_test.framework.common import test_constants
+from tests.unit.framework.common import test_constants
 
 # Identifiers of entities we expect to find in the generated module.
 SERVICER_IDENTIFIER = 'BetaTestServiceServicer'
@@ -218,7 +218,7 @@ class PythonPluginTest(unittest.TestCase):
     protoc_plugin_filename = distutils.spawn.find_executable(
         'grpc_python_plugin')
     test_proto_filename = pkg_resources.resource_filename(
-        'grpc_protoc_plugin', 'test.proto')
+        'tests.protoc_plugin', 'protoc_plugin_test.proto')
     if not os.path.isfile(protoc_command):
       # Assume that if we haven't built protoc that it's on the system.
       protoc_command = 'protoc'
@@ -237,7 +237,7 @@ class PythonPluginTest(unittest.TestCase):
     ]
     subprocess.check_call(' '.join(cmd), shell=True, env=os.environ,
                           cwd=os.path.dirname(test_proto_filename))
-    sys.path.append(self.outdir)
+    sys.path.insert(0, self.outdir)
 
   def tearDown(self):
     try:
@@ -245,22 +245,26 @@ class PythonPluginTest(unittest.TestCase):
     except OSError as exc:
       if exc.errno != errno.ENOENT:
         raise
+    sys.path.remove(self.outdir)
 
   def testImportAttributes(self):
     # check that we can access the generated module and its members.
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     self.assertIsNotNone(getattr(test_pb2, SERVICER_IDENTIFIER, None))
     self.assertIsNotNone(getattr(test_pb2, STUB_IDENTIFIER, None))
     self.assertIsNotNone(getattr(test_pb2, SERVER_FACTORY_IDENTIFIER, None))
     self.assertIsNotNone(getattr(test_pb2, STUB_FACTORY_IDENTIFIER, None))
 
   def testUpDown(self):
-    import test_pb2
+    import protoc_plugin_test_pb2 as test_pb2
+    reload(test_pb2)
     with _CreateService(test_pb2) as (servicer, stub):
       request = test_pb2.SimpleRequest(response_size=13)
 
   def testUnaryCall(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       request = test_pb2.SimpleRequest(response_size=13)
       response = stub.UnaryCall(request, test_constants.LONG_TIMEOUT)
@@ -268,7 +272,8 @@ class PythonPluginTest(unittest.TestCase):
     self.assertEqual(expected_response, response)
 
   def testUnaryCallFuture(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request = test_pb2.SimpleRequest(response_size=13)
     with _CreateService(test_pb2) as (methods, stub):
       # Check that the call does not block waiting for the server to respond.
@@ -280,7 +285,8 @@ class PythonPluginTest(unittest.TestCase):
     self.assertEqual(expected_response, response)
 
   def testUnaryCallFutureExpired(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       request = test_pb2.SimpleRequest(response_size=13)
       with methods.pause():
@@ -290,7 +296,8 @@ class PythonPluginTest(unittest.TestCase):
           response_future.result()
 
   def testUnaryCallFutureCancelled(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request = test_pb2.SimpleRequest(response_size=13)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.pause():
@@ -299,7 +306,8 @@ class PythonPluginTest(unittest.TestCase):
         self.assertTrue(response_future.cancelled())
 
   def testUnaryCallFutureFailed(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request = test_pb2.SimpleRequest(response_size=13)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.fail():
@@ -308,7 +316,8 @@ class PythonPluginTest(unittest.TestCase):
         self.assertIsNotNone(response_future.exception())
 
   def testStreamingOutputCall(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request = _streaming_output_request(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       responses = stub.StreamingOutputCall(
@@ -320,7 +329,8 @@ class PythonPluginTest(unittest.TestCase):
         self.assertEqual(expected_response, response)
 
   def testStreamingOutputCallExpired(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request = _streaming_output_request(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.pause():
@@ -330,7 +340,8 @@ class PythonPluginTest(unittest.TestCase):
           list(responses)
 
   def testStreamingOutputCallCancelled(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request = _streaming_output_request(test_pb2)
     with _CreateService(test_pb2) as (unused_methods, stub):
       responses = stub.StreamingOutputCall(
@@ -341,7 +352,8 @@ class PythonPluginTest(unittest.TestCase):
         next(responses)
 
   def testStreamingOutputCallFailed(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request = _streaming_output_request(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.fail():
@@ -351,7 +363,8 @@ class PythonPluginTest(unittest.TestCase):
           next(responses)
 
   def testStreamingInputCall(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       response = stub.StreamingInputCall(
           _streaming_input_request_iterator(test_pb2),
@@ -361,7 +374,8 @@ class PythonPluginTest(unittest.TestCase):
     self.assertEqual(expected_response, response)
 
   def testStreamingInputCallFuture(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.pause():
         response_future = stub.StreamingInputCall.future(
@@ -373,7 +387,8 @@ class PythonPluginTest(unittest.TestCase):
     self.assertEqual(expected_response, response)
 
   def testStreamingInputCallFutureExpired(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.pause():
         response_future = stub.StreamingInputCall.future(
@@ -385,7 +400,8 @@ class PythonPluginTest(unittest.TestCase):
             response_future.exception(), face.ExpirationError)
 
   def testStreamingInputCallFutureCancelled(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.pause():
         response_future = stub.StreamingInputCall.future(
@@ -397,7 +413,8 @@ class PythonPluginTest(unittest.TestCase):
         response_future.result()
 
   def testStreamingInputCallFutureFailed(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.fail():
         response_future = stub.StreamingInputCall.future(
@@ -406,7 +423,8 @@ class PythonPluginTest(unittest.TestCase):
         self.assertIsNotNone(response_future.exception())
 
   def testFullDuplexCall(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       responses = stub.FullDuplexCall(
           _full_duplex_request_iterator(test_pb2), test_constants.LONG_TIMEOUT)
@@ -417,7 +435,8 @@ class PythonPluginTest(unittest.TestCase):
         self.assertEqual(expected_response, response)
 
   def testFullDuplexCallExpired(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request_iterator = _full_duplex_request_iterator(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.pause():
@@ -427,7 +446,8 @@ class PythonPluginTest(unittest.TestCase):
           list(responses)
 
   def testFullDuplexCallCancelled(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       request_iterator = _full_duplex_request_iterator(test_pb2)
       responses = stub.FullDuplexCall(
@@ -438,7 +458,8 @@ class PythonPluginTest(unittest.TestCase):
         next(responses)
 
   def testFullDuplexCallFailed(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     request_iterator = _full_duplex_request_iterator(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       with methods.fail():
@@ -449,7 +470,8 @@ class PythonPluginTest(unittest.TestCase):
           next(responses)
 
   def testHalfDuplexCall(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     with _CreateService(test_pb2) as (methods, stub):
       def half_duplex_request_iterator():
         request = test_pb2.StreamingOutputCallRequest()
@@ -468,7 +490,8 @@ class PythonPluginTest(unittest.TestCase):
         self.assertEqual(expected_response, response)
 
   def testHalfDuplexCallWedged(self):
-    import test_pb2  # pylint: disable=g-import-not-at-top
+    import protoc_plugin_test_pb2 as test_pb2  # pylint: disable=g-import-not-at-top
+    reload(test_pb2)
     condition = threading.Condition()
     wait_cell = [False]
     @contextlib.contextmanager
diff --git a/src/python/grpcio_test/grpc_protoc_plugin/test.proto b/src/python/grpcio/tests/protoc_plugin/protoc_plugin_test.proto
index 6762a8e7f3..6762a8e7f3 100644
--- a/src/python/grpcio_test/grpc_protoc_plugin/test.proto
+++ b/src/python/grpcio/tests/protoc_plugin/protoc_plugin_test.proto
diff --git a/src/python/grpcio_test/grpc_test/__init__.py b/src/python/grpcio/tests/unit/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/__init__.py
+++ b/src/python/grpcio/tests/unit/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/_adapter/.gitignore b/src/python/grpcio/tests/unit/_adapter/.gitignore
index a6f96cd6db..a6f96cd6db 100644
--- a/src/python/grpcio_test/grpc_test/_adapter/.gitignore
+++ b/src/python/grpcio/tests/unit/_adapter/.gitignore
diff --git a/src/python/grpcio_test/grpc_test/_adapter/__init__.py b/src/python/grpcio/tests/unit/_adapter/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/_adapter/__init__.py
+++ b/src/python/grpcio/tests/unit/_adapter/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/_adapter/_c_test.py b/src/python/grpcio/tests/unit/_adapter/_c_test.py
index fe020e2a9c..fe020e2a9c 100644
--- a/src/python/grpcio_test/grpc_test/_adapter/_c_test.py
+++ b/src/python/grpcio/tests/unit/_adapter/_c_test.py
diff --git a/src/python/grpcio_test/grpc_test/_adapter/_intermediary_low_test.py b/src/python/grpcio/tests/unit/_adapter/_intermediary_low_test.py
index 90ad0b9bcb..90ad0b9bcb 100644
--- a/src/python/grpcio_test/grpc_test/_adapter/_intermediary_low_test.py
+++ b/src/python/grpcio/tests/unit/_adapter/_intermediary_low_test.py
diff --git a/src/python/grpcio_test/grpc_test/_adapter/_low_test.py b/src/python/grpcio/tests/unit/_adapter/_low_test.py
index 8115cd0e83..39b6f247b4 100644
--- a/src/python/grpcio_test/grpc_test/_adapter/_low_test.py
+++ b/src/python/grpcio/tests/unit/_adapter/_low_test.py
@@ -34,7 +34,7 @@ import unittest
 from grpc import _grpcio_metadata
 from grpc._adapter import _types
 from grpc._adapter import _low
-from grpc_test import test_common
+from tests.unit import test_common
 
 
 def wait_for_events(completion_queues, deadline):
diff --git a/src/python/grpcio_test/grpc_test/_adapter/_proto_scenarios.py b/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
index b3d6ec8607..f55a7a23ea 100644
--- a/src/python/grpcio_test/grpc_test/_adapter/_proto_scenarios.py
+++ b/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
@@ -32,7 +32,7 @@
 import abc
 import threading
 
-from grpc_test._junkdrawer import math_pb2
+from tests.unit._junkdrawer import math_pb2
 
 
 class ProtoScenario(object):
diff --git a/src/python/grpcio_test/grpc_test/_core_over_links_base_interface_test.py b/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
index cafb6b6eae..efc990421a 100644
--- a/src/python/grpcio_test/grpc_test/_core_over_links_base_interface_test.py
+++ b/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
@@ -41,10 +41,10 @@ from grpc._links import service
 from grpc.beta import interfaces as beta_interfaces
 from grpc.framework.core import implementations
 from grpc.framework.interfaces.base import utilities
-from grpc_test import test_common as grpc_test_common
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.base import test_cases
-from grpc_test.framework.interfaces.base import test_interfaces
+from tests.unit import test_common as grpc_test_common
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.base import test_cases
+from tests.unit.framework.interfaces.base import test_interfaces
 
 
 class _SerializationBehaviors(
diff --git a/src/python/grpcio_test/grpc_test/_crust_over_core_over_links_face_interface_test.py b/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
index a4d4dee38c..4faaaadc2b 100644
--- a/src/python/grpcio_test/grpc_test/_crust_over_core_over_links_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
@@ -40,10 +40,10 @@ from grpc.framework.core import implementations as core_implementations
 from grpc.framework.crust import implementations as crust_implementations
 from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.links import utilities
-from grpc_test import test_common as grpc_test_common
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.face import test_cases
-from grpc_test.framework.interfaces.face import test_interfaces
+from tests.unit import test_common as grpc_test_common
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.face import test_cases
+from tests.unit.framework.interfaces.face import test_interfaces
 
 
 class _SerializationBehaviors(
diff --git a/src/python/grpcio_test/grpc_test/_cython/.gitignore b/src/python/grpcio/tests/unit/_cython/.gitignore
index c315029288..c315029288 100644
--- a/src/python/grpcio_test/grpc_test/_cython/.gitignore
+++ b/src/python/grpcio/tests/unit/_cython/.gitignore
diff --git a/src/python/grpcio_test/grpc_test/_cython/__init__.py b/src/python/grpcio/tests/unit/_cython/__init__.py
index b89398809f..b89398809f 100644
--- a/src/python/grpcio_test/grpc_test/_cython/__init__.py
+++ b/src/python/grpcio/tests/unit/_cython/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/_cython/adapter_low_test.py b/src/python/grpcio/tests/unit/_cython/adapter_low_test.py
index f1bec238cf..f1bec238cf 100644
--- a/src/python/grpcio_test/grpc_test/_cython/adapter_low_test.py
+++ b/src/python/grpcio/tests/unit/_cython/adapter_low_test.py
diff --git a/src/python/grpcio_test/grpc_test/_cython/cygrpc_test.py b/src/python/grpcio/tests/unit/_cython/cygrpc_test.py
index 1307a30ca0..84ee5c9eb5 100644
--- a/src/python/grpcio_test/grpc_test/_cython/cygrpc_test.py
+++ b/src/python/grpcio/tests/unit/_cython/cygrpc_test.py
@@ -31,8 +31,8 @@ import time
 import unittest
 
 from grpc._cython import cygrpc
-from grpc_test._cython import test_utilities
-from grpc_test import test_common
+from tests.unit._cython import test_utilities
+from tests.unit import test_common
 
 
 class TypeSmokeTest(unittest.TestCase):
diff --git a/src/python/grpcio_test/grpc_test/_cython/test_utilities.py b/src/python/grpcio/tests/unit/_cython/test_utilities.py
index 21ea3075b4..21ea3075b4 100644
--- a/src/python/grpcio_test/grpc_test/_cython/test_utilities.py
+++ b/src/python/grpcio/tests/unit/_cython/test_utilities.py
diff --git a/src/python/grpcio_test/grpc_test/_junkdrawer/__init__.py b/src/python/grpcio/tests/unit/_junkdrawer/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/_junkdrawer/__init__.py
+++ b/src/python/grpcio/tests/unit/_junkdrawer/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/_junkdrawer/math_pb2.py b/src/python/grpcio/tests/unit/_junkdrawer/math_pb2.py
index 20165955b4..20165955b4 100644
--- a/src/python/grpcio_test/grpc_test/_junkdrawer/math_pb2.py
+++ b/src/python/grpcio/tests/unit/_junkdrawer/math_pb2.py
diff --git a/src/python/grpcio_test/grpc_test/_junkdrawer/stock_pb2.py b/src/python/grpcio/tests/unit/_junkdrawer/stock_pb2.py
index eef18f82d6..eef18f82d6 100644
--- a/src/python/grpcio_test/grpc_test/_junkdrawer/stock_pb2.py
+++ b/src/python/grpcio/tests/unit/_junkdrawer/stock_pb2.py
diff --git a/src/python/grpcio_test/grpc_test/_links/__init__.py b/src/python/grpcio/tests/unit/_links/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/_links/__init__.py
+++ b/src/python/grpcio/tests/unit/_links/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/_links/_lonely_invocation_link_test.py b/src/python/grpcio/tests/unit/_links/_lonely_invocation_link_test.py
index 8e12e8cc22..890755f81c 100644
--- a/src/python/grpcio_test/grpc_test/_links/_lonely_invocation_link_test.py
+++ b/src/python/grpcio/tests/unit/_links/_lonely_invocation_link_test.py
@@ -34,9 +34,9 @@ import unittest
 from grpc._adapter import _intermediary_low
 from grpc._links import invocation
 from grpc.framework.interfaces.links import links
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.links import test_cases
-from grpc_test.framework.interfaces.links import test_utilities
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.links import test_cases
+from tests.unit.framework.interfaces.links import test_utilities
 
 _NULL_BEHAVIOR = lambda unused_argument: None
 
diff --git a/src/python/grpcio_test/grpc_test/_links/_proto_scenarios.py b/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
index 0d74d66297..f69ff51b16 100644
--- a/src/python/grpcio_test/grpc_test/_links/_proto_scenarios.py
+++ b/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
@@ -32,8 +32,8 @@
 import abc
 import threading
 
-from grpc_test._junkdrawer import math_pb2
-from grpc_test.framework.common import test_constants
+from tests.unit._junkdrawer import math_pb2
+from tests.unit.framework.common import test_constants
 
 
 class ProtoScenario(object):
diff --git a/src/python/grpcio_test/grpc_test/_links/_transmission_test.py b/src/python/grpcio/tests/unit/_links/_transmission_test.py
index 77e83d5561..888684d197 100644
--- a/src/python/grpcio_test/grpc_test/_links/_transmission_test.py
+++ b/src/python/grpcio/tests/unit/_links/_transmission_test.py
@@ -36,11 +36,11 @@ from grpc._links import invocation
 from grpc._links import service
 from grpc.beta import interfaces as beta_interfaces
 from grpc.framework.interfaces.links import links
-from grpc_test import test_common
-from grpc_test._links import _proto_scenarios
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.links import test_cases
-from grpc_test.framework.interfaces.links import test_utilities
+from tests.unit import test_common
+from tests.unit._links import _proto_scenarios
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.links import test_cases
+from tests.unit.framework.interfaces.links import test_utilities
 
 _IDENTITY = lambda x: x
 
diff --git a/src/python/grpcio_test/grpc_test/beta/__init__.py b/src/python/grpcio/tests/unit/beta/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/beta/__init__.py
+++ b/src/python/grpcio/tests/unit/beta/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/beta/_beta_features_test.py b/src/python/grpcio/tests/unit/beta/_beta_features_test.py
index 5916a9e3ea..5a7492ee9e 100644
--- a/src/python/grpcio_test/grpc_test/beta/_beta_features_test.py
+++ b/src/python/grpcio/tests/unit/beta/_beta_features_test.py
@@ -36,9 +36,9 @@ from grpc.beta import implementations
 from grpc.beta import interfaces
 from grpc.framework.common import cardinality
 from grpc.framework.interfaces.face import utilities
-from grpc_test import resources
-from grpc_test.beta import test_utilities
-from grpc_test.framework.common import test_constants
+from tests.unit import resources
+from tests.unit.beta import test_utilities
+from tests.unit.framework.common import test_constants
 
 _SERVER_HOST_OVERRIDE = 'foo.test.google.fr'
 
@@ -224,5 +224,78 @@ class BetaFeaturesTest(unittest.TestCase):
     self.assertEqual(_RESPONSE, response)
 
 
+class ContextManagementAndLifecycleTest(unittest.TestCase):
+
+  def setUp(self):
+    self._servicer = _Servicer()
+    self._method_implementations = {
+        (_GROUP, _UNARY_UNARY):
+            utilities.unary_unary_inline(self._servicer.unary_unary),
+        (_GROUP, _UNARY_STREAM):
+            utilities.unary_stream_inline(self._servicer.unary_stream),
+        (_GROUP, _STREAM_UNARY):
+            utilities.stream_unary_inline(self._servicer.stream_unary),
+        (_GROUP, _STREAM_STREAM):
+            utilities.stream_stream_inline(self._servicer.stream_stream),
+    }
+
+    self._cardinalities = {
+        _UNARY_UNARY: cardinality.Cardinality.UNARY_UNARY,
+        _UNARY_STREAM: cardinality.Cardinality.UNARY_STREAM,
+        _STREAM_UNARY: cardinality.Cardinality.STREAM_UNARY,
+        _STREAM_STREAM: cardinality.Cardinality.STREAM_STREAM,
+    }
+
+    self._server_options = implementations.server_options(
+        thread_pool_size=test_constants.POOL_SIZE)
+    self._server_credentials = implementations.ssl_server_credentials(
+        [(resources.private_key(), resources.certificate_chain(),),])
+    self._client_credentials = implementations.ssl_client_credentials(
+        resources.test_root_certificates(), None, None)
+    self._stub_options = implementations.stub_options(
+        thread_pool_size=test_constants.POOL_SIZE)
+
+  def test_stub_context(self):
+    server = implementations.server(
+        self._method_implementations, options=self._server_options)
+    port = server.add_secure_port('[::]:0', self._server_credentials)
+    server.start()
+
+    channel = test_utilities.not_really_secure_channel(
+        'localhost', port, self._client_credentials, _SERVER_HOST_OVERRIDE)
+    dynamic_stub = implementations.dynamic_stub(
+        channel, _GROUP, self._cardinalities, options=self._stub_options)
+    for _ in range(100):
+      with dynamic_stub:
+        pass
+    for _ in range(10):
+      with dynamic_stub:
+        call_options = interfaces.grpc_call_options(
+            disable_compression=True)
+        response = getattr(dynamic_stub, _UNARY_UNARY)(
+            _REQUEST, test_constants.LONG_TIMEOUT,
+            protocol_options=call_options)
+        self.assertEqual(_RESPONSE, response)
+        self.assertIsNotNone(self._servicer.peer())
+
+    server.stop(test_constants.SHORT_TIMEOUT).wait()
+
+  def test_server_lifecycle(self):
+    for _ in range(100):
+      server = implementations.server(
+          self._method_implementations, options=self._server_options)
+      port = server.add_secure_port('[::]:0', self._server_credentials)
+      server.start()
+      server.stop(test_constants.SHORT_TIMEOUT).wait()
+    for _ in range(100):
+      server = implementations.server(
+          self._method_implementations, options=self._server_options)
+      server.add_secure_port('[::]:0', self._server_credentials)
+      server.add_insecure_port('[::]:0')
+      with server:
+        server.stop(test_constants.SHORT_TIMEOUT)
+      server.stop(test_constants.SHORT_TIMEOUT)
+
+
 if __name__ == '__main__':
   unittest.main(verbosity=2)
diff --git a/src/python/grpcio_test/grpc_test/beta/_connectivity_channel_test.py b/src/python/grpcio/tests/unit/beta/_connectivity_channel_test.py
index b3c05bdb0c..5dc8720639 100644
--- a/src/python/grpcio_test/grpc_test/beta/_connectivity_channel_test.py
+++ b/src/python/grpcio/tests/unit/beta/_connectivity_channel_test.py
@@ -37,7 +37,7 @@ from grpc._adapter import _low
 from grpc._adapter import _types
 from grpc.beta import _connectivity_channel
 from grpc.beta import interfaces
-from grpc_test.framework.common import test_constants
+from tests.unit.framework.common import test_constants
 
 
 def _drive_completion_queue(completion_queue):
diff --git a/src/python/grpcio_test/grpc_test/beta/_face_interface_test.py b/src/python/grpcio/tests/unit/beta/_face_interface_test.py
index aa33e1e6f8..55c0d20060 100644
--- a/src/python/grpcio_test/grpc_test/beta/_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/beta/_face_interface_test.py
@@ -34,12 +34,12 @@ import unittest
 
 from grpc.beta import implementations
 from grpc.beta import interfaces
-from grpc_test import resources
-from grpc_test import test_common as grpc_test_common
-from grpc_test.beta import test_utilities
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.face import test_cases
-from grpc_test.framework.interfaces.face import test_interfaces
+from tests.unit import resources
+from tests.unit import test_common as grpc_test_common
+from tests.unit.beta import test_utilities
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.face import test_cases
+from tests.unit.framework.interfaces.face import test_interfaces
 
 _SERVER_HOST_OVERRIDE = 'foo.test.google.fr'
 
diff --git a/src/python/grpcio_test/grpc_test/beta/_not_found_test.py b/src/python/grpcio/tests/unit/beta/_not_found_test.py
index 5feb997fef..44fcd1e13c 100644
--- a/src/python/grpcio_test/grpc_test/beta/_not_found_test.py
+++ b/src/python/grpcio/tests/unit/beta/_not_found_test.py
@@ -34,7 +34,7 @@ import unittest
 from grpc.beta import implementations
 from grpc.beta import interfaces
 from grpc.framework.interfaces.face import face
-from grpc_test.framework.common import test_constants
+from tests.unit.framework.common import test_constants
 
 
 class NotFoundTest(unittest.TestCase):
diff --git a/src/python/grpcio_test/grpc_test/beta/_utilities_test.py b/src/python/grpcio/tests/unit/beta/_utilities_test.py
index 996cea9118..08ce98e751 100644
--- a/src/python/grpcio_test/grpc_test/beta/_utilities_test.py
+++ b/src/python/grpcio/tests/unit/beta/_utilities_test.py
@@ -38,7 +38,7 @@ from grpc._adapter import _types
 from grpc.beta import implementations
 from grpc.beta import utilities
 from grpc.framework.foundation import future
-from grpc_test.framework.common import test_constants
+from tests.unit.framework.common import test_constants
 
 
 def _drive_completion_queue(completion_queue):
diff --git a/src/python/grpcio_test/grpc_test/beta/test_utilities.py b/src/python/grpcio/tests/unit/beta/test_utilities.py
index 24a8600e12..24a8600e12 100644
--- a/src/python/grpcio_test/grpc_test/beta/test_utilities.py
+++ b/src/python/grpcio/tests/unit/beta/test_utilities.py
diff --git a/src/python/grpcio_test/grpc_test/credentials/README b/src/python/grpcio/tests/unit/credentials/README
index cb20dcb49f..cb20dcb49f 100644
--- a/src/python/grpcio_test/grpc_test/credentials/README
+++ b/src/python/grpcio/tests/unit/credentials/README
diff --git a/src/python/grpcio_test/grpc_test/credentials/ca.pem b/src/python/grpcio/tests/unit/credentials/ca.pem
index 6c8511a73c..6c8511a73c 100755
--- a/src/python/grpcio_test/grpc_test/credentials/ca.pem
+++ b/src/python/grpcio/tests/unit/credentials/ca.pem
diff --git a/src/python/grpcio_test/grpc_test/credentials/server1.key b/src/python/grpcio/tests/unit/credentials/server1.key
index 143a5b8765..143a5b8765 100755
--- a/src/python/grpcio_test/grpc_test/credentials/server1.key
+++ b/src/python/grpcio/tests/unit/credentials/server1.key
diff --git a/src/python/grpcio_test/grpc_test/credentials/server1.pem b/src/python/grpcio/tests/unit/credentials/server1.pem
index f3d43fcc5b..f3d43fcc5b 100755
--- a/src/python/grpcio_test/grpc_test/credentials/server1.pem
+++ b/src/python/grpcio/tests/unit/credentials/server1.pem
diff --git a/src/python/grpcio_test/grpc_test/framework/__init__.py b/src/python/grpcio/tests/unit/framework/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/_crust_over_core_face_interface_test.py b/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
index 30bb85f6c3..360ecc95d5 100644
--- a/src/python/grpcio_test/grpc_test/framework/_crust_over_core_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
@@ -36,10 +36,10 @@ from grpc.framework.core import implementations as core_implementations
 from grpc.framework.crust import implementations as crust_implementations
 from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.links import utilities
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.face import test_cases
-from grpc_test.framework.interfaces.face import test_interfaces
-from grpc_test.framework.interfaces.links import test_utilities
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.face import test_cases
+from tests.unit.framework.interfaces.face import test_interfaces
+from tests.unit.framework.interfaces.links import test_utilities
 
 
 class _Implementation(test_interfaces.Implementation):
diff --git a/src/python/grpcio_test/grpc_test/framework/common/__init__.py b/src/python/grpcio/tests/unit/framework/common/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/common/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/common/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/common/test_constants.py b/src/python/grpcio/tests/unit/framework/common/test_constants.py
index e1d3c2709d..e1d3c2709d 100644
--- a/src/python/grpcio_test/grpc_test/framework/common/test_constants.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_constants.py
diff --git a/src/python/grpcio_test/grpc_test/framework/common/test_control.py b/src/python/grpcio/tests/unit/framework/common/test_control.py
index 8d6eba5c2c..8d6eba5c2c 100644
--- a/src/python/grpcio_test/grpc_test/framework/common/test_control.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_control.py
diff --git a/src/python/grpcio_test/grpc_test/framework/common/test_coverage.py b/src/python/grpcio/tests/unit/framework/common/test_coverage.py
index a7ed3582c4..a7ed3582c4 100644
--- a/src/python/grpcio_test/grpc_test/framework/common/test_coverage.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_coverage.py
diff --git a/src/python/grpcio_test/grpc_test/framework/core/__init__.py b/src/python/grpcio/tests/unit/framework/core/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/core/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/core/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/core/_base_interface_test.py b/src/python/grpcio/tests/unit/framework/core/_base_interface_test.py
index 8d72f131d5..1310292306 100644
--- a/src/python/grpcio_test/grpc_test/framework/core/_base_interface_test.py
+++ b/src/python/grpcio/tests/unit/framework/core/_base_interface_test.py
@@ -36,9 +36,9 @@ import unittest
 
 from grpc.framework.core import implementations
 from grpc.framework.interfaces.base import utilities
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.base import test_cases
-from grpc_test.framework.interfaces.base import test_interfaces
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.base import test_cases
+from tests.unit.framework.interfaces.base import test_interfaces
 
 
 class _Implementation(test_interfaces.Implementation):
diff --git a/src/python/grpcio_test/grpc_test/framework/face/__init__.py b/src/python/grpcio/tests/unit/framework/face/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/face/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/__init__.py b/src/python/grpcio/tests/unit/framework/face/testing/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/base_util.py b/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
index 1df1529b27..1df1529b27 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/base_util.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/blocking_invocation_inline_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
index 251e1eb68e..0613516421 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/blocking_invocation_inline_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
@@ -34,12 +34,12 @@ import abc
 import unittest  # pylint: disable=unused-import
 
 from grpc.framework.face import exceptions
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.face.testing import control
-from grpc_test.framework.face.testing import coverage
-from grpc_test.framework.face.testing import digest
-from grpc_test.framework.face.testing import stock_service
-from grpc_test.framework.face.testing import test_case
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.face.testing import control
+from tests.unit.framework.face.testing import coverage
+from tests.unit.framework.face.testing import digest
+from tests.unit.framework.face.testing import stock_service
+from tests.unit.framework.face.testing import test_case
 
 
 class BlockingInvocationInlineServiceTestCase(
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/callback.py b/src/python/grpcio/tests/unit/framework/face/testing/callback.py
index d0e63c8c56..d0e63c8c56 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/callback.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/callback.py
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/control.py b/src/python/grpcio/tests/unit/framework/face/testing/control.py
index 3960c4e649..3960c4e649 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/control.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/control.py
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/coverage.py b/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
index f3aca113fe..f3aca113fe 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/coverage.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/digest.py b/src/python/grpcio/tests/unit/framework/face/testing/digest.py
index 54ff21779a..39f28b9657 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/digest.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/digest.py
@@ -40,9 +40,9 @@ from grpc.framework.face import exceptions
 from grpc.framework.face import interfaces as face_interfaces
 from grpc.framework.foundation import stream
 from grpc.framework.foundation import stream_util
-from grpc_test.framework.face.testing import control as testing_control  # pylint: disable=unused-import
-from grpc_test.framework.face.testing import interfaces  # pylint: disable=unused-import
-from grpc_test.framework.face.testing import service as testing_service  # pylint: disable=unused-import
+from tests.unit.framework.face.testing import control as testing_control  # pylint: disable=unused-import
+from tests.unit.framework.face.testing import interfaces  # pylint: disable=unused-import
+from tests.unit.framework.face.testing import service as testing_service  # pylint: disable=unused-import
 
 _IDENTITY = lambda x: x
 
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/event_invocation_synchronous_event_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
index 9df77678eb..179f3a2f67 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
@@ -33,13 +33,13 @@ import abc
 import unittest
 
 from grpc.framework.face import interfaces
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.face.testing import callback as testing_callback
-from grpc_test.framework.face.testing import control
-from grpc_test.framework.face.testing import coverage
-from grpc_test.framework.face.testing import digest
-from grpc_test.framework.face.testing import stock_service
-from grpc_test.framework.face.testing import test_case
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.face.testing import callback as testing_callback
+from tests.unit.framework.face.testing import control
+from tests.unit.framework.face.testing import coverage
+from tests.unit.framework.face.testing import digest
+from tests.unit.framework.face.testing import stock_service
+from tests.unit.framework.face.testing import test_case
 
 
 class EventInvocationSynchronousEventServiceTestCase(
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
index 70d86a0422..485524a356 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
@@ -37,12 +37,12 @@ import unittest
 from grpc.framework.face import exceptions
 from grpc.framework.foundation import future
 from grpc.framework.foundation import logging_pool
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.face.testing import control
-from grpc_test.framework.face.testing import coverage
-from grpc_test.framework.face.testing import digest
-from grpc_test.framework.face.testing import stock_service
-from grpc_test.framework.face.testing import test_case
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.face.testing import control
+from tests.unit.framework.face.testing import coverage
+from tests.unit.framework.face.testing import digest
+from tests.unit.framework.face.testing import stock_service
+from tests.unit.framework.face.testing import test_case
 
 _MAXIMUM_POOL_SIZE = 10
 
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/interfaces.py b/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
index 5932dabf1e..5932dabf1e 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/service.py b/src/python/grpcio/tests/unit/framework/face/testing/service.py
index ee9d6a3da3..ac0b89b6ee 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/service.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/service.py
@@ -33,7 +33,7 @@ import abc
 
 # interfaces is referenced from specification in this module.
 from grpc.framework.face import interfaces as face_interfaces  # pylint: disable=unused-import
-from grpc_test.framework.face.testing import interfaces
+from tests.unit.framework.face.testing import interfaces
 
 
 class UnaryUnaryTestMethodImplementation(interfaces.Method):
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/stock_service.py b/src/python/grpcio/tests/unit/framework/face/testing/stock_service.py
index 0f83ca4db1..117c723f79 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/stock_service.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/stock_service.py
@@ -33,8 +33,8 @@ from grpc.framework.common import cardinality
 from grpc.framework.foundation import abandonment
 from grpc.framework.foundation import stream
 from grpc.framework.foundation import stream_util
-from grpc_test.framework.face.testing import service
-from grpc_test._junkdrawer import stock_pb2
+from tests.unit.framework.face.testing import service
+from tests.unit._junkdrawer import stock_pb2
 
 SYMBOL_FORMAT = 'test symbol:%03d'
 STREAM_LENGTH = 400
diff --git a/src/python/grpcio_test/grpc_test/framework/face/testing/test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
index 858d5cf7fd..23d4d919c2 100644
--- a/src/python/grpcio_test/grpc_test/framework/face/testing/test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
@@ -33,7 +33,7 @@ import abc
 
 # face_interfaces and interfaces are referenced in specification in this module.
 from grpc.framework.face import interfaces as face_interfaces  # pylint: disable=unused-import
-from grpc_test.framework.face.testing import interfaces  # pylint: disable=unused-import
+from tests.unit.framework.face.testing import interfaces  # pylint: disable=unused-import
 
 
 class FaceTestCase(object):
diff --git a/src/python/grpcio_test/grpc_test/framework/foundation/__init__.py b/src/python/grpcio/tests/unit/framework/foundation/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/foundation/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/foundation/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/foundation/_later_test.py b/src/python/grpcio/tests/unit/framework/foundation/_later_test.py
index 6c2459e185..6c2459e185 100644
--- a/src/python/grpcio_test/grpc_test/framework/foundation/_later_test.py
+++ b/src/python/grpcio/tests/unit/framework/foundation/_later_test.py
diff --git a/src/python/grpcio_test/grpc_test/framework/foundation/_logging_pool_test.py b/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
index 452802da6a..452802da6a 100644
--- a/src/python/grpcio_test/grpc_test/framework/foundation/_logging_pool_test.py
+++ b/src/python/grpcio/tests/unit/framework/foundation/_logging_pool_test.py
diff --git a/src/python/grpcio_test/grpc_test/framework/foundation/stream_testing.py b/src/python/grpcio/tests/unit/framework/foundation/stream_testing.py
index 098a53d5e7..098a53d5e7 100644
--- a/src/python/grpcio_test/grpc_test/framework/foundation/stream_testing.py
+++ b/src/python/grpcio/tests/unit/framework/foundation/stream_testing.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/__init__.py b/src/python/grpcio/tests/unit/framework/interfaces/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/base/__init__.py b/src/python/grpcio/tests/unit/framework/interfaces/base/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/base/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/base/_control.py b/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
index 46a01876d8..38102b198a 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/base/_control.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
@@ -37,10 +37,10 @@ import threading
 import time
 
 from grpc.framework.interfaces.base import base
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.base import _sequence
-from grpc_test.framework.interfaces.base import _state
-from grpc_test.framework.interfaces.base import test_interfaces  # pylint: disable=unused-import
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.base import _sequence
+from tests.unit.framework.interfaces.base import _state
+from tests.unit.framework.interfaces.base import test_interfaces  # pylint: disable=unused-import
 
 _GROUP = 'base test cases test group'
 _METHOD = 'base test cases test method'
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/base/_sequence.py b/src/python/grpcio/tests/unit/framework/interfaces/base/_sequence.py
index f547d91681..571d0e1e63 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/base/_sequence.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/_sequence.py
@@ -33,7 +33,7 @@ import collections
 import enum
 
 from grpc.framework.interfaces.base import base
-from grpc_test.framework.common import test_constants
+from tests.unit.framework.common import test_constants
 
 
 class Invocation(
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/base/_state.py b/src/python/grpcio/tests/unit/framework/interfaces/base/_state.py
index 21cf33aeb6..21cf33aeb6 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/base/_state.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/_state.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/base/test_cases.py b/src/python/grpcio/tests/unit/framework/interfaces/base/test_cases.py
index ddda1018c3..4f8e26c9a2 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/base/test_cases.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/test_cases.py
@@ -38,9 +38,9 @@ import unittest
 from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.base import base
 from grpc.framework.interfaces.base import utilities
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.base import _control
-from grpc_test.framework.interfaces.base import test_interfaces
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.base import _control
+from tests.unit.framework.interfaces.base import test_interfaces
 
 _SYNCHRONICITY_VARIATION = (('Sync', False), ('Async', True))
 
@@ -271,6 +271,7 @@ def test_cases(implementation):
                 '_randomness': randomness,
                 '_synchronicity_variation': synchronicity_variation[1],
                 '_controller_creator': controller_creator,
+                '__module__': implementation.__module__,
                }))
 
   return test_case_classes
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/base/test_interfaces.py b/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
index 02426ab846..84afd24d47 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/base/test_interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
@@ -131,7 +131,7 @@ class Implementation(object):
 
   @abc.abstractmethod
   def service_initial_metadata(self):
-    """Provices an operation's service-side initial metadata.
+    """Provides an operation's service-side initial metadata.
 
     Returns:
       A value to use for an operation's service-side initial metadata, or
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_3069_test_constant.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_3069_test_constant.py
index 363d9ce8f1..1ea356c0bf 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_3069_test_constant.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_3069_test_constant.py
@@ -30,7 +30,7 @@
 """A test constant working around issue 3069."""
 
 # test_constants is referenced from specification in this module.
-from grpc_test.framework.common import test_constants  # pylint: disable=unused-import
+from tests.unit.framework.common import test_constants  # pylint: disable=unused-import
 
 # TODO(issue 3069): Replace uses of this constant with
 # test_constants.SHORT_TIMEOUT.
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/__init__.py b/src/python/grpcio/tests/unit/framework/interfaces/face/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_blocking_invocation_inline_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
index 2d2a081955..3bcefa601d 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_blocking_invocation_inline_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
@@ -34,13 +34,13 @@ import unittest
 
 # test_interfaces is referenced from specification in this module.
 from grpc.framework.interfaces.face import face
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.common import test_control
-from grpc_test.framework.common import test_coverage
-from grpc_test.framework.interfaces.face import _3069_test_constant
-from grpc_test.framework.interfaces.face import _digest
-from grpc_test.framework.interfaces.face import _stock_service
-from grpc_test.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.common import test_control
+from tests.unit.framework.common import test_coverage
+from tests.unit.framework.interfaces.face import _3069_test_constant
+from tests.unit.framework.interfaces.face import _digest
+from tests.unit.framework.interfaces.face import _stock_service
+from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
 
 
 class TestCase(test_coverage.Coverage, unittest.TestCase):
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_digest.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
index da56ed7b27..9304b6b1db 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_digest.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
@@ -39,9 +39,9 @@ from grpc.framework.common import style
 from grpc.framework.foundation import stream
 from grpc.framework.foundation import stream_util
 from grpc.framework.interfaces.face import face
-from grpc_test.framework.common import test_control  # pylint: disable=unused-import
-from grpc_test.framework.interfaces.face import _service  # pylint: disable=unused-import
-from grpc_test.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
+from tests.unit.framework.common import test_control  # pylint: disable=unused-import
+from tests.unit.framework.interfaces.face import _service  # pylint: disable=unused-import
+from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
 
 _IDENTITY = lambda x: x
 
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_event_invocation_synchronous_event_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_event_invocation_synchronous_event_service.py
index 7cb273bf78..34db6c3e55 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_event_invocation_synchronous_event_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_event_invocation_synchronous_event_service.py
@@ -34,14 +34,14 @@ import unittest
 
 # test_interfaces is referenced from specification in this module.
 from grpc.framework.interfaces.face import face
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.common import test_control
-from grpc_test.framework.common import test_coverage
-from grpc_test.framework.interfaces.face import _3069_test_constant
-from grpc_test.framework.interfaces.face import _digest
-from grpc_test.framework.interfaces.face import _receiver
-from grpc_test.framework.interfaces.face import _stock_service
-from grpc_test.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.common import test_control
+from tests.unit.framework.common import test_coverage
+from tests.unit.framework.interfaces.face import _3069_test_constant
+from tests.unit.framework.interfaces.face import _digest
+from tests.unit.framework.interfaces.face import _receiver
+from tests.unit.framework.interfaces.face import _stock_service
+from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
 
 
 class TestCase(test_coverage.Coverage, unittest.TestCase):
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_future_invocation_asynchronous_event_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
index 3032736975..c178f2f108 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
@@ -37,13 +37,13 @@ import unittest
 # test_interfaces is referenced from specification in this module.
 from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.face import face
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.common import test_control
-from grpc_test.framework.common import test_coverage
-from grpc_test.framework.interfaces.face import _3069_test_constant
-from grpc_test.framework.interfaces.face import _digest
-from grpc_test.framework.interfaces.face import _stock_service
-from grpc_test.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.common import test_control
+from tests.unit.framework.common import test_coverage
+from tests.unit.framework.interfaces.face import _3069_test_constant
+from tests.unit.framework.interfaces.face import _digest
+from tests.unit.framework.interfaces.face import _stock_service
+from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
 
 
 class _PauseableIterator(object):
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_invocation.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
index 448e845a08..448e845a08 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_invocation.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_receiver.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
index 2e444ff09d..2e444ff09d 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_receiver.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_receiver.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
index e25b8a038c..28941e2ad0 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
@@ -33,7 +33,7 @@ import abc
 
 # face is referenced from specification in this module.
 from grpc.framework.interfaces.face import face  # pylint: disable=unused-import
-from grpc_test.framework.interfaces.face import test_interfaces
+from tests.unit.framework.interfaces.face import test_interfaces
 
 
 class UnaryUnaryTestMethodImplementation(test_interfaces.Method):
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_stock_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_stock_service.py
index 808e2c4e36..5299655bb3 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/_stock_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_stock_service.py
@@ -32,9 +32,9 @@
 from grpc.framework.common import cardinality
 from grpc.framework.foundation import abandonment
 from grpc.framework.foundation import stream
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.face import _service
-from grpc_test._junkdrawer import stock_pb2
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.face import _service
+from tests.unit._junkdrawer import stock_pb2
 
 _STOCK_GROUP_NAME = 'Stock'
 _SYMBOL_FORMAT = 'test symbol:%03d'
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/test_cases.py b/src/python/grpcio/tests/unit/framework/interfaces/face/test_cases.py
index ca623662f7..462829b660 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/test_cases.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/test_cases.py
@@ -33,11 +33,11 @@
 import unittest  # pylint: disable=unused-import
 
 # test_interfaces is referenced from specification in this module.
-from grpc_test.framework.interfaces.face import _blocking_invocation_inline_service
-from grpc_test.framework.interfaces.face import _event_invocation_synchronous_event_service
-from grpc_test.framework.interfaces.face import _future_invocation_asynchronous_event_service
-from grpc_test.framework.interfaces.face import _invocation
-from grpc_test.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
+from tests.unit.framework.interfaces.face import _blocking_invocation_inline_service
+from tests.unit.framework.interfaces.face import _event_invocation_synchronous_event_service
+from tests.unit.framework.interfaces.face import _future_invocation_asynchronous_event_service
+from tests.unit.framework.interfaces.face import _invocation
+from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
 
 _TEST_CASE_SUPERCLASSES = (
     _blocking_invocation_inline_service.TestCase,
@@ -63,5 +63,7 @@ def test_cases(implementation):
       test_case_classes.append(
           type(invoker_constructor.name() + super_class.NAME, (super_class,),
                {'implementation': implementation,
-                'invoker_constructor': invoker_constructor}))
+                'invoker_constructor': invoker_constructor,
+                '__module__': implementation.__module__,
+               }))
   return test_case_classes
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/face/test_interfaces.py b/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
index b2b5c10fa6..b2b5c10fa6 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/face/test_interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/links/__init__.py b/src/python/grpcio/tests/unit/framework/interfaces/links/__init__.py
index 7086519106..7086519106 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/links/__init__.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/links/__init__.py
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/links/test_cases.py b/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
index ecf49d9cdb..dace6c23f3 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/links/test_cases.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
@@ -34,8 +34,8 @@ import abc
 import unittest  # pylint: disable=unused-import
 
 from grpc.framework.interfaces.links import links
-from grpc_test.framework.common import test_constants
-from grpc_test.framework.interfaces.links import test_utilities
+from tests.unit.framework.common import test_constants
+from tests.unit.framework.interfaces.links import test_utilities
 
 
 def at_least_n_payloads_received_predicate(n):
diff --git a/src/python/grpcio_test/grpc_test/framework/interfaces/links/test_utilities.py b/src/python/grpcio/tests/unit/framework/interfaces/links/test_utilities.py
index 39c7f2fc63..39c7f2fc63 100644
--- a/src/python/grpcio_test/grpc_test/framework/interfaces/links/test_utilities.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/links/test_utilities.py
diff --git a/src/python/grpcio_test/grpc_test/resources.py b/src/python/grpcio/tests/unit/resources.py
index 2c3045313d..2c3045313d 100644
--- a/src/python/grpcio_test/grpc_test/resources.py
+++ b/src/python/grpcio/tests/unit/resources.py
diff --git a/src/python/grpcio_test/grpc_test/test_common.py b/src/python/grpcio/tests/unit/test_common.py
index 29431bfb9d..29431bfb9d 100644
--- a/src/python/grpcio_test/grpc_test/test_common.py
+++ b/src/python/grpcio/tests/unit/test_common.py
diff --git a/src/python/grpcio/tox.ini b/src/python/grpcio/tox.ini
new file mode 100644
index 0000000000..bfb1ca0cfa
--- /dev/null
+++ b/src/python/grpcio/tox.ini
@@ -0,0 +1,19 @@
+# Tox (http://tox.testrun.org/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+skipsdist = true
+envlist = py27
+
+[testenv]
+commands =
+    {envpython} setup.py build_py
+    {envpython} setup.py test
+    coverage combine
+    coverage html --include='grpc/*' --omit='grpc/framework/alpha/*','grpc/early_adopter/*','grpc/framework/base/*','grpc/framework/face/*','grpc/_adapter/fore.py','grpc/_adapter/rear.py'
+    coverage report --include='grpc/*' --omit='grpc/framework/alpha/*','grpc/early_adopter/*','grpc/framework/base/*','grpc/framework/face/*','grpc/_adapter/fore.py','grpc/_adapter/rear.py'
+deps =
+    -rrequirements.txt
+passenv = *
diff --git a/src/python/grpcio_test/.gitignore b/src/python/grpcio_test/.gitignore
deleted file mode 100644
index 6158313bde..0000000000
--- a/src/python/grpcio_test/.gitignore
+++ /dev/null
@@ -1,12 +0,0 @@
-MANIFEST
-*.egg-info/
-build/
-dist/
-*.egg
-*.egg/
-*.eggs/
-*_pb2.py
-.coverage
-.coverage.*
-.cache/
-nosetests.xml
diff --git a/src/python/grpcio_test/MANIFEST.in b/src/python/grpcio_test/MANIFEST.in
deleted file mode 100644
index c9327307dc..0000000000
--- a/src/python/grpcio_test/MANIFEST.in
+++ /dev/null
@@ -1,4 +0,0 @@
-graft grpc_interop
-graft grpc_test
-include commands.py
-include requirements.txt
diff --git a/src/python/grpcio_test/commands.py b/src/python/grpcio_test/commands.py
deleted file mode 100644
index edaa2aa72d..0000000000
--- a/src/python/grpcio_test/commands.py
+++ /dev/null
@@ -1,106 +0,0 @@
-# Copyright 2015, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Provides distutils command classes for the GRPC Python test setup process."""
-
-import distutils
-import os
-import os.path
-import subprocess
-import sys
-
-import setuptools
-from setuptools.command import build_py
-
-
-class RunTests(setuptools.Command):
-  """Command to run all tests via py.test."""
-
-  description = ''
-  user_options = [('pytest-args=', 'a', 'arguments to pass to py.test')]
-
-  def initialize_options(self):
-    self.pytest_args = []
-
-  def finalize_options(self):
-    pass
-
-  def run(self):
-    # We import here to ensure that setup.py has had a chance to install the
-    # relevant package eggs first.
-    import pytest
-
-    self.run_command('build_proto_modules')
-    result = pytest.main(self.pytest_args)
-    if result != 0:
-      raise SystemExit(result)
-
-
-class BuildProtoModules(setuptools.Command):
-  """Command to generate project *_pb2.py modules from proto files."""
-
-  description = ''
-  user_options = []
-
-  def initialize_options(self):
-    pass
-
-  def finalize_options(self):
-    self.protoc_command = distutils.spawn.find_executable('protoc')
-    self.grpc_python_plugin_command = distutils.spawn.find_executable(
-        'grpc_python_plugin')
-
-  def run(self):
-    paths = []
-    root_directory = os.getcwd()
-    for walk_root, directories, filenames in os.walk(root_directory):
-      for filename in filenames:
-        if filename.endswith('.proto'):
-          paths.append(os.path.join(walk_root, filename))
-    command = [
-        self.protoc_command,
-        '--plugin=protoc-gen-python-grpc={}'.format(
-            self.grpc_python_plugin_command),
-        '-I {}'.format(root_directory),
-        '--python_out={}'.format(root_directory),
-        '--python-grpc_out={}'.format(root_directory),
-    ] + paths
-    try:
-      subprocess.check_output(' '.join(command), cwd=root_directory, shell=True,
-                              stderr=subprocess.STDOUT)
-    except subprocess.CalledProcessError as e:
-      raise Exception('{}\nOutput:\n{}'.format(e.message, e.output))
-
-
-class BuildPy(build_py.build_py):
-  """Custom project build command."""
-
-  def run(self):
-    self.run_command('build_proto_modules')
-    build_py.build_py.run(self)
diff --git a/src/python/grpcio_test/grpc_test/conftest.py b/src/python/grpcio_test/grpc_test/conftest.py
deleted file mode 100644
index 357320ec64..0000000000
--- a/src/python/grpcio_test/grpc_test/conftest.py
+++ /dev/null
@@ -1,60 +0,0 @@
-import types
-import unittest
-
-import pytest
-
-
-class LoadTestsSuiteCollector(pytest.Collector):
-
-  def __init__(self, name, parent, suite):
-    super(LoadTestsSuiteCollector, self).__init__(name, parent=parent)
-    self.suite = suite
-    self.obj = suite
-
-  def collect(self):
-    collected = []
-    for case in self.suite:
-      if isinstance(case, unittest.TestCase):
-        collected.append(LoadTestsCase(case.id(), self, case))
-      elif isinstance(case, unittest.TestSuite):
-        collected.append(
-            LoadTestsSuiteCollector('suite_child_of_mine', self, case))
-    return collected
-
-  def reportinfo(self):
-    return str(self.suite)
-
-
-class LoadTestsCase(pytest.Function):
-
-  def __init__(self, name, parent, item):
-    super(LoadTestsCase, self).__init__(name, parent, callobj=self._item_run)
-    self.item = item
-
-  def _item_run(self):
-    result = unittest.TestResult()
-    self.item(result)
-    if result.failures:
-      test_method, trace = result.failures[0]
-      pytest.fail(trace, False)
-    elif result.errors:
-      test_method, trace = result.errors[0]
-      pytest.fail(trace, False)
-    elif result.skipped:
-      test_method, reason = result.skipped[0]
-      pytest.skip(reason)
-
-
-def pytest_pycollect_makeitem(collector, name, obj):
-  if name == 'load_tests' and isinstance(obj, types.FunctionType):
-    suite = unittest.TestSuite()
-    loader = unittest.TestLoader()
-    pattern = '*'
-    try:
-      # Check that the 'load_tests' object is actually a callable that actually
-      # accepts the arguments expected for the load_tests protocol.
-      suite = obj(loader, suite, pattern)
-    except Exception as e:
-      return None
-    else:
-      return LoadTestsSuiteCollector(name, collector, suite)
diff --git a/src/python/grpcio_test/requirements.txt b/src/python/grpcio_test/requirements.txt
deleted file mode 100644
index fea80ca07f..0000000000
--- a/src/python/grpcio_test/requirements.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-grpcio>=0.11.0b0
-oauth2client>=1.4.7
-protobuf>=3.0.0a3
-pytest>=2.6
-pytest-cov>=2.0
-pytest-xdist>=1.11
diff --git a/src/python/grpcio_test/setup.cfg b/src/python/grpcio_test/setup.cfg
deleted file mode 100644
index 3be93cb918..0000000000
--- a/src/python/grpcio_test/setup.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-[pytest]
-python_files = *_test.py
diff --git a/templates/gRPC.podspec.template b/templates/gRPC.podspec.template
index de5ed7cd8c..67fc8f6602 100644
--- a/templates/gRPC.podspec.template
+++ b/templates/gRPC.podspec.template
@@ -97,7 +97,7 @@
 
       ss.requires_arc = false
       ss.libraries = 'z'
-      ss.dependency 'OpenSSL', '~> 1.0.204.1'
+      ss.dependency 'BoringSSL', '~> 1.0'
 
       # ss.compiler_flags = '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
     end
diff --git a/test/core/end2end/invalid_call_argument_test.c b/test/core/end2end/invalid_call_argument_test.c
new file mode 100644
index 0000000000..58aeef18f7
--- /dev/null
+++ b/test/core/end2end/invalid_call_argument_test.c
@@ -0,0 +1,558 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <limits.h>
+#include "test/core/end2end/cq_verifier.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+static void *tag(gpr_intptr i) { return (void *)i; }
+
+struct test_state {
+  int is_client;
+  grpc_channel *chan;
+  grpc_call *call;
+  gpr_timespec deadline;
+  grpc_completion_queue *cq;
+  cq_verifier *cqv;
+  grpc_op ops[6];
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_status_code status;
+  char *details;
+  size_t details_capacity;
+  grpc_call *server_call;
+  grpc_server *server;
+  grpc_metadata_array server_initial_metadata_recv;
+  grpc_call_details call_details;
+};
+
+static struct test_state g_state;
+
+static void prepare_test(int is_client) {
+  int port;
+  char *server_hostport;
+  grpc_op *op;
+  g_state.is_client = is_client;
+  grpc_metadata_array_init(&g_state.initial_metadata_recv);
+  grpc_metadata_array_init(&g_state.trailing_metadata_recv);
+  g_state.deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(2);
+  g_state.cq = grpc_completion_queue_create(NULL);
+  g_state.cqv = cq_verifier_create(g_state.cq);
+  g_state.details = NULL;
+  g_state.details_capacity = 0;
+
+  if (is_client) {
+    /* create a call, channel to a non existant server */
+    g_state.chan =
+        grpc_insecure_channel_create("nonexistant:54321", NULL, NULL);
+    g_state.call = grpc_channel_create_call(
+        g_state.chan, NULL, GRPC_PROPAGATE_DEFAULTS, g_state.cq, "/Foo",
+        "nonexistant", g_state.deadline, NULL);
+  } else {
+    g_state.server = grpc_server_create(NULL, NULL);
+    grpc_server_register_completion_queue(g_state.server, g_state.cq, NULL);
+    port = grpc_pick_unused_port_or_die();
+    gpr_join_host_port(&server_hostport, "0.0.0.0", port);
+    grpc_server_add_insecure_http2_port(g_state.server, server_hostport);
+    grpc_server_start(g_state.server);
+    gpr_free(server_hostport);
+    gpr_join_host_port(&server_hostport, "localhost", port);
+    g_state.chan = grpc_insecure_channel_create(server_hostport, NULL, NULL);
+    gpr_free(server_hostport);
+    g_state.call = grpc_channel_create_call(
+        g_state.chan, NULL, GRPC_PROPAGATE_DEFAULTS, g_state.cq, "/Foo", "bar",
+        g_state.deadline, NULL);
+    grpc_metadata_array_init(&g_state.server_initial_metadata_recv);
+    grpc_call_details_init(&g_state.call_details);
+    op = g_state.ops;
+    op->op = GRPC_OP_SEND_INITIAL_METADATA;
+    op->data.send_initial_metadata.count = 0;
+    op->flags = 0;
+    op->reserved = NULL;
+    op++;
+    GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(g_state.call, g_state.ops,
+                                                     (size_t)(op - g_state.ops),
+                                                     tag(1), NULL));
+    GPR_ASSERT(GRPC_CALL_OK ==
+               grpc_server_request_call(g_state.server, &g_state.server_call,
+                                        &g_state.call_details,
+                                        &g_state.server_initial_metadata_recv,
+                                        g_state.cq, g_state.cq, tag(101)));
+    cq_expect_completion(g_state.cqv, tag(101), 1);
+    cq_expect_completion(g_state.cqv, tag(1), 1);
+    cq_verify(g_state.cqv);
+  }
+}
+
+static void cleanup_test() {
+  grpc_call_destroy(g_state.call);
+  cq_verifier_destroy(g_state.cqv);
+  grpc_channel_destroy(g_state.chan);
+  gpr_free(g_state.details);
+  grpc_metadata_array_destroy(&g_state.initial_metadata_recv);
+  grpc_metadata_array_destroy(&g_state.trailing_metadata_recv);
+
+  if (!g_state.is_client) {
+    grpc_call_destroy(g_state.server_call);
+    grpc_server_shutdown_and_notify(g_state.server, g_state.cq, tag(1000));
+    GPR_ASSERT(grpc_completion_queue_pluck(g_state.cq, tag(1000),
+                                           GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5),
+                                           NULL)
+                   .type == GRPC_OP_COMPLETE);
+    grpc_server_destroy(g_state.server);
+    grpc_call_details_destroy(&g_state.call_details);
+    grpc_metadata_array_destroy(&g_state.server_initial_metadata_recv);
+  }
+  grpc_completion_queue_shutdown(g_state.cq);
+  while (grpc_completion_queue_next(g_state.cq,
+                                    gpr_inf_future(GPR_CLOCK_REALTIME), NULL)
+             .type != GRPC_QUEUE_SHUTDOWN)
+    ;
+  grpc_completion_queue_destroy(g_state.cq);
+}
+
+static void test_non_null_reserved_on_start_batch() {
+  prepare_test(1);
+  GPR_ASSERT(GRPC_CALL_ERROR ==
+             grpc_call_start_batch(g_state.call, NULL, 0, NULL, tag(1)));
+  cleanup_test();
+}
+
+static void test_non_null_reserved_on_op() {
+  grpc_op *op;
+  prepare_test(1);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = tag(2);
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_send_initial_metadata_more_than_once() {
+  grpc_op *op;
+  prepare_test(1);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(g_state.call, g_state.ops,
+                                                   (size_t)(op - g_state.ops),
+                                                   tag(1), NULL));
+  cq_expect_completion(g_state.cqv, tag(1), 0);
+  cq_verify(g_state.cqv);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_too_many_metadata() {
+  grpc_op *op;
+  prepare_test(1);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = (size_t)INT_MAX + 1;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_INVALID_METADATA ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_send_null_message() {
+  grpc_op *op;
+  prepare_test(1);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = NULL;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_INVALID_MESSAGE ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_send_messages_at_the_same_time() {
+  grpc_op *op;
+  gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
+  grpc_byte_buffer *request_payload =
+      grpc_raw_byte_buffer_create(&request_payload_slice, 1);
+  prepare_test(1);
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = request_payload;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_MESSAGE;
+  op->data.send_message = tag(2);
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  grpc_byte_buffer_destroy(request_payload);
+  cleanup_test();
+}
+
+static void test_send_server_status_from_client() {
+  grpc_op *op;
+  prepare_test(1);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+  op->data.send_status_from_server.status_details = "xyz";
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_NOT_ON_CLIENT ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_receive_initial_metadata_twice_at_client() {
+  grpc_op *op;
+  prepare_test(1);
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &g_state.initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(g_state.call, g_state.ops,
+                                                   (size_t)(op - g_state.ops),
+                                                   tag(1), NULL));
+  cq_expect_completion(g_state.cqv, tag(1), 0);
+  cq_verify(g_state.cqv);
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &g_state.initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS == grpc_call_start_batch(g_state.call, g_state.ops,
+                                                   (size_t)(op - g_state.ops),
+                                                   tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_receive_message_with_invalid_flags() {
+  grpc_op *op;
+  grpc_byte_buffer *payload = NULL;
+  prepare_test(1);
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &payload;
+  op->flags = 1;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_INVALID_FLAGS == grpc_call_start_batch(g_state.call, g_state.ops,
+                                                                    (size_t)(op - g_state.ops),
+                                                                    tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_receive_two_messages_at_the_same_time() {
+  grpc_op *op;
+  grpc_byte_buffer *payload = NULL;
+  prepare_test(1);
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &payload;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_MESSAGE;
+  op->data.recv_message = &payload;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS == grpc_call_start_batch(g_state.call, g_state.ops,
+                                                                    (size_t)(op - g_state.ops),
+                                                                    tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_recv_close_on_server_from_client() {
+  grpc_op *op;
+  prepare_test(1);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = NULL;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_NOT_ON_CLIENT ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_recv_status_on_client_twice() {
+  grpc_op *op;
+  prepare_test(1);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata =
+      &g_state.trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &g_state.status;
+  op->data.recv_status_on_client.status_details = &g_state.details;
+  op->data.recv_status_on_client.status_details_capacity =
+      &g_state.details_capacity;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_start_batch(g_state.call, g_state.ops,
+                                                   (size_t)(op - g_state.ops),
+                                                   tag(1), NULL));
+  cq_expect_completion(g_state.cqv, tag(1), 1);
+  cq_verify(g_state.cqv);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = NULL;
+  op->data.recv_status_on_client.status = NULL;
+  op->data.recv_status_on_client.status_details = NULL;
+  op->data.recv_status_on_client.status_details_capacity = NULL;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS ==
+             grpc_call_start_batch(g_state.call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(1), NULL));
+  cleanup_test();
+}
+
+static void test_send_close_from_client_on_server() {
+  grpc_op *op;
+  prepare_test(0);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_NOT_ON_SERVER ==
+             grpc_call_start_batch(g_state.server_call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(2), NULL));
+  cleanup_test();
+}
+
+static void test_recv_status_on_client_from_server() {
+  grpc_op *op;
+  prepare_test(0);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata =
+      &g_state.trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &g_state.status;
+  op->data.recv_status_on_client.status_details = &g_state.details;
+  op->data.recv_status_on_client.status_details_capacity =
+      &g_state.details_capacity;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_NOT_ON_SERVER ==
+             grpc_call_start_batch(g_state.server_call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(2), NULL));
+  cleanup_test();
+}
+
+static void test_send_status_from_server_with_invalid_flags() {
+  grpc_op *op;
+  prepare_test(0);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+  op->data.send_status_from_server.status_details = "xyz";
+  op->flags = 1;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_INVALID_FLAGS ==
+             grpc_call_start_batch(g_state.server_call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(2), NULL));
+  cleanup_test();
+}
+
+static void test_too_many_trailing_metadata() {
+  grpc_op *op;
+  prepare_test(0);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count =
+      (size_t)INT_MAX + 1;
+  op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+  op->data.send_status_from_server.status_details = "xyz";
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_INVALID_METADATA ==
+             grpc_call_start_batch(g_state.server_call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(2), NULL));
+  cleanup_test();
+}
+
+static void test_send_server_status_twice() {
+  grpc_op *op;
+  prepare_test(0);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+  op->data.send_status_from_server.status_details = "xyz";
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+  op->data.send_status_from_server.trailing_metadata_count = 0;
+  op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+  op->data.send_status_from_server.status_details = "xyz";
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS ==
+             grpc_call_start_batch(g_state.server_call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(2), NULL));
+  cleanup_test();
+}
+
+static void test_recv_close_on_server_with_invalid_flags() {
+  grpc_op *op;
+  prepare_test(0);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = NULL;
+  op->flags = 1;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_INVALID_FLAGS ==
+             grpc_call_start_batch(g_state.server_call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(2), NULL));
+  cleanup_test();
+}
+
+static void test_recv_close_on_server_twice() {
+  grpc_op *op;
+  prepare_test(0);
+
+  op = g_state.ops;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = NULL;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+  op->data.recv_close_on_server.cancelled = NULL;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  GPR_ASSERT(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS ==
+             grpc_call_start_batch(g_state.server_call, g_state.ops,
+                                   (size_t)(op - g_state.ops), tag(2), NULL));
+  cleanup_test();
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  grpc_init();
+  test_non_null_reserved_on_start_batch();
+  test_non_null_reserved_on_op();
+  test_send_initial_metadata_more_than_once();
+  test_too_many_metadata();
+  test_send_null_message();
+  test_send_messages_at_the_same_time();
+  test_send_server_status_from_client();
+  test_receive_initial_metadata_twice_at_client();
+  test_receive_message_with_invalid_flags();
+  test_receive_two_messages_at_the_same_time();
+  test_recv_close_on_server_from_client();
+  test_recv_status_on_client_twice();
+  test_send_close_from_client_on_server();
+  test_recv_status_on_client_from_server();
+  test_send_status_from_server_with_invalid_flags();
+  test_too_many_trailing_metadata();
+  test_send_server_status_twice();
+  test_recv_close_on_server_with_invalid_flags();
+  test_recv_close_on_server_twice();
+  grpc_shutdown();
+
+  return 0;
+}
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.c
index 9af76be257..834113488c 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.c
@@ -1032,6 +1032,7 @@ static void test_get_well_known_google_credentials_file_path(void) {
   GPR_ASSERT(path == NULL);
 #endif /* GPR_POSIX_ENV || GPR_LINUX_ENV */
   gpr_setenv("HOME", old_home);
+  gpr_free(old_home);
 #else /* GPR_POSIX_FILE */
   char *path = grpc_get_well_known_google_credentials_file_path();
   GPR_ASSERT(path != NULL);
diff --git a/test/core/support/slice_buffer_test.c b/test/core/support/slice_buffer_test.c
index a48278434f..cf2da84c2b 100644
--- a/test/core/support/slice_buffer_test.c
+++ b/test/core/support/slice_buffer_test.c
@@ -35,13 +35,12 @@
 #include <grpc/support/slice_buffer.h>
 #include "test/core/util/test_config.h"
 
-int main(int argc, char **argv) {
+void test_slice_buffer_add() {
   gpr_slice_buffer buf;
   gpr_slice aaa = gpr_slice_from_copied_string("aaa");
   gpr_slice bb = gpr_slice_from_copied_string("bb");
   size_t i;
 
-  grpc_test_init(argc, argv);
   gpr_slice_buffer_init(&buf);
   for (i = 0; i < 10; i++) {
     gpr_slice_ref(aaa);
@@ -70,6 +69,61 @@ int main(int argc, char **argv) {
   GPR_ASSERT(buf.count == 0);
   GPR_ASSERT(buf.length == 0);
   gpr_slice_buffer_destroy(&buf);
+}
+
+void test_slice_buffer_move_first() {
+  gpr_slice slices[3];
+  gpr_slice_buffer src;
+  gpr_slice_buffer dst;
+  int idx = 0;
+  size_t src_len = 0;
+  size_t dst_len = 0;
+
+  slices[0] = gpr_slice_from_copied_string("aaa");
+  slices[1] = gpr_slice_from_copied_string("bbbb");
+  slices[2] = gpr_slice_from_copied_string("ccc");
+
+  gpr_slice_buffer_init(&src);
+  gpr_slice_buffer_init(&dst);
+  for (idx = 0; idx < 3; idx++) {
+    gpr_slice_ref(slices[idx]);
+    /* For this test, it is important that we add each slice at a new
+       slice index */
+    gpr_slice_buffer_add_indexed(&src, slices[idx]);
+    gpr_slice_buffer_add_indexed(&dst, slices[idx]);
+  }
+
+  /* Case 1: Move more than the first slice's length from src to dst */
+  src_len = src.length;
+  dst_len = dst.length;
+  gpr_slice_buffer_move_first(&src, 4, &dst);
+  src_len -= 4;
+  dst_len += 4;
+  GPR_ASSERT(src.length == src_len);
+  GPR_ASSERT(dst.length == dst_len);
+
+  /* src now has two slices ["bbb"] and  ["ccc"] */
+  /* Case 2: Move the first slice from src to dst */
+  gpr_slice_buffer_move_first(&src, 3, &dst);
+  src_len -= 3;
+  dst_len += 3;
+  GPR_ASSERT(src.length == src_len);
+  GPR_ASSERT(dst.length == dst_len);
+
+  /* src now has one slice ["ccc"] */
+  /* Case 3: Move less than the first slice's length from src to dst*/
+  gpr_slice_buffer_move_first(&src, 2, &dst);
+  src_len -= 2;
+  dst_len += 2;
+  GPR_ASSERT(src.length == src.length);
+  GPR_ASSERT(dst.length == dst.length);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+
+  test_slice_buffer_add();
+  test_slice_buffer_move_first();
 
   return 0;
 }
diff --git a/test/core/surface/multi_init_test.c b/test/core/surface/init_test.c
index 99b7a52ff9..c8791965bf 100644
--- a/test/core/surface/multi_init_test.c
+++ b/test/core/surface/init_test.c
@@ -32,8 +32,11 @@
  */
 
 #include <grpc/grpc.h>
+#include <grpc/support/log.h>
 #include "test/core/util/test_config.h"
 
+static int g_flag;
+
 static void test(int rounds) {
   int i;
   for (i = 0; i < rounds; i++) {
@@ -53,11 +56,23 @@ static void test_mixed() {
   grpc_shutdown();
 }
 
+static void plugin_init() { g_flag = 1; }
+static void plugin_destroy() { g_flag = 2; }
+
+static void test_plugin() {
+  grpc_register_plugin(plugin_init, plugin_destroy);
+  grpc_init();
+  GPR_ASSERT(g_flag == 1);
+  grpc_shutdown();
+  GPR_ASSERT(g_flag == 2);
+}
+
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   test(1);
   test(2);
   test(3);
   test_mixed();
+  test_plugin();
   return 0;
 }
diff --git a/test/core/tsi/transport_security_test.c b/test/core/tsi/transport_security_test.c
index 858b92fc9d..7ce343987b 100644
--- a/test/core/tsi/transport_security_test.c
+++ b/test/core/tsi/transport_security_test.c
@@ -43,6 +43,7 @@
 #include <openssl/crypto.h>
 
 #include "src/core/support/string.h"
+#include "src/core/tsi/fake_transport_security.h"
 #include "src/core/tsi/ssl_transport_security.h"
 #include "test/core/util/test_config.h"
 
@@ -296,8 +297,70 @@ static void test_peer_matches_name(void) {
   }
 }
 
+typedef struct {
+  tsi_result res;
+  const char *str;
+} tsi_result_string_pair;
+
+static void test_result_strings(void) {
+  const tsi_result_string_pair results[] = {
+      {TSI_OK, "TSI_OK"},
+      {TSI_UNKNOWN_ERROR, "TSI_UNKNOWN_ERROR"},
+      {TSI_INVALID_ARGUMENT, "TSI_INVALID_ARGUMENT"},
+      {TSI_PERMISSION_DENIED, "TSI_PERMISSION_DENIED"},
+      {TSI_INCOMPLETE_DATA, "TSI_INCOMPLETE_DATA"},
+      {TSI_FAILED_PRECONDITION, "TSI_FAILED_PRECONDITION"},
+      {TSI_UNIMPLEMENTED, "TSI_UNIMPLEMENTED"},
+      {TSI_INTERNAL_ERROR, "TSI_INTERNAL_ERROR"},
+      {TSI_DATA_CORRUPTED, "TSI_DATA_CORRUPTED"},
+      {TSI_NOT_FOUND, "TSI_NOT_FOUND"},
+      {TSI_PROTOCOL_FAILURE, "TSI_PROTOCOL_FAILURE"},
+      {TSI_HANDSHAKE_IN_PROGRESS, "TSI_HANDSHAKE_IN_PROGRESS"},
+      {TSI_OUT_OF_RESOURCES, "TSI_OUT_OF_RESOURCES"}};
+  size_t i;
+  for (i = 0; i < GPR_ARRAY_SIZE(results); i++) {
+    GPR_ASSERT(strcmp(results[i].str, tsi_result_to_string(results[i].res)) ==
+               0);
+  }
+  GPR_ASSERT(strcmp("UNKNOWN", tsi_result_to_string((tsi_result)42)) == 0);
+}
+
+static void test_protector_invalid_args(void) {
+  GPR_ASSERT(tsi_frame_protector_protect(NULL, NULL, NULL, NULL, NULL) ==
+             TSI_INVALID_ARGUMENT);
+  GPR_ASSERT(tsi_frame_protector_protect_flush(NULL, NULL, NULL, NULL) ==
+             TSI_INVALID_ARGUMENT);
+  GPR_ASSERT(tsi_frame_protector_unprotect(NULL, NULL, NULL, NULL, NULL) ==
+             TSI_INVALID_ARGUMENT);
+}
+
+static void test_handshaker_invalid_args(void) {
+  GPR_ASSERT(tsi_handshaker_get_result(NULL) == TSI_INVALID_ARGUMENT);
+  GPR_ASSERT(tsi_handshaker_extract_peer(NULL, NULL) == TSI_INVALID_ARGUMENT);
+  GPR_ASSERT(tsi_handshaker_create_frame_protector(NULL, NULL, NULL) ==
+             TSI_INVALID_ARGUMENT);
+  GPR_ASSERT(tsi_handshaker_process_bytes_from_peer(NULL, NULL, NULL) ==
+             TSI_INVALID_ARGUMENT);
+  GPR_ASSERT(tsi_handshaker_get_bytes_to_send_to_peer(NULL, NULL, NULL) ==
+             TSI_INVALID_ARGUMENT);
+}
+
+static void test_handshaker_invalid_state(void) {
+  tsi_handshaker *h = tsi_create_fake_handshaker(0);
+  tsi_peer peer;
+  tsi_frame_protector *p;
+  GPR_ASSERT(tsi_handshaker_extract_peer(h, &peer) == TSI_FAILED_PRECONDITION);
+  GPR_ASSERT(tsi_handshaker_create_frame_protector(h, NULL, &p) ==
+             TSI_FAILED_PRECONDITION);
+  tsi_handshaker_destroy(h);
+}
+
 int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   test_peer_matches_name();
+  test_result_strings();
+  test_protector_invalid_args();
+  test_handshaker_invalid_args();
+  test_handshaker_invalid_state();
   return 0;
 }
diff --git a/tools/jenkins/grpc_interop_python/Dockerfile b/tools/jenkins/grpc_interop_python/Dockerfile
index 5850f5f321..6034cbf955 100644
--- a/tools/jenkins/grpc_interop_python/Dockerfile
+++ b/tools/jenkins/grpc_interop_python/Dockerfile
@@ -75,6 +75,7 @@ RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
 # Install Python requisites
 RUN /bin/bash -l -c "pip install --upgrade pip"
 RUN /bin/bash -l -c "pip install virtualenv"
+RUN /bin/bash -l -c "pip install tox"
 
 # Define the default command.
 CMD ["bash"]
diff --git a/tools/jenkins/grpc_jenkins_slave/Dockerfile b/tools/jenkins/grpc_jenkins_slave/Dockerfile
index 5b8c24c076..916e5e83fb 100644
--- a/tools/jenkins/grpc_jenkins_slave/Dockerfile
+++ b/tools/jenkins/grpc_jenkins_slave/Dockerfile
@@ -131,7 +131,7 @@ RUN apt-get update && apt-get install -y \
 # Install Python packages from PyPI
 RUN pip install pip --upgrade
 RUN pip install virtualenv
-RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 tox
 
 # For sanity test
 RUN pip install simplejson mako
diff --git a/tools/run_tests/build_python.sh b/tools/run_tests/build_python.sh
index 24cf6ba7c8..57080ce934 100755
--- a/tools/run_tests/build_python.sh
+++ b/tools/run_tests/build_python.sh
@@ -34,71 +34,16 @@ set -ex
 cd $(dirname $0)/../..
 
 ROOT=`pwd`
-PATH=$ROOT/bins/$CONFIG:$ROOT/bins/$CONFIG/protobuf:$PATH
 GRPCIO=$ROOT/src/python/grpcio
-GRPCIO_TEST=$ROOT/src/python/grpcio_test
-GRPCIO_HEALTH_CHECKING=$ROOT/src/python/grpcio_health_checking
-
-install_grpcio_deps() {
-  cd $GRPCIO
-  pip install -r requirements.txt
-}
-install_grpcio_test_deps() {
-  cd $GRPCIO_TEST
-  pip install -r requirements.txt
-}
-
-install_grpcio() {
-  CFLAGS="-I$ROOT/include -std=c89" LDFLAGS=-L$ROOT/libs/$CONFIG GRPC_PYTHON_BUILD_WITH_CYTHON=1 pip install $GRPCIO
-}
-install_grpcio_test() {
-  pip install $GRPCIO_TEST
-}
-install_grpcio_health_checking() {
-  pip install $GRPCIO_HEALTH_CHECKING
-}
-
-# Cleans the environment of previous installations
-clean_grpcio_all() {
-  (yes | pip uninstall grpcio) || true
-  (yes | pip uninstall grpcio_test) || true
-  (yes | pip uninstall grpcio_health_checking) || true
-}
-
-# Builds the testing environment.
-make_virtualenv() {
-  virtualenv_name="python"$1"_virtual_environment"
-  if [ ! -d $virtualenv_name ]
-  then
-    # Build the entire virtual environment
-    virtualenv -p `which "python"$1` $virtualenv_name
-    source $virtualenv_name/bin/activate
-
-    # Install grpcio
-    install_grpcio_deps
-    install_grpcio
-
-    # Install grpcio_test
-    install_grpcio_test_deps
-    install_grpcio_test
-
-    # Install grpcio_health_checking
-    install_grpcio_health_checking
-  else
-    source $virtualenv_name/bin/activate
-    # Uninstall and re-install the packages we care about. Don't use
-    # --force-reinstall or --ignore-installed to avoid propagating this
-    # unnecessarily to dependencies. Don't use --no-deps to avoid missing
-    # dependency upgrades.
-    clean_grpcio_all
-    install_grpcio || (
-      # Fall back to rebuilding the entire environment
-      rm -rf $virtualenv_name
-      make_virtualenv $1
-    )
-    install_grpcio_test
-    install_grpcio_health_checking
-  fi
-}
-
-make_virtualenv $1
+export LD_LIBRARY_PATH=$ROOT/libs/$CONFIG
+export DYLD_LIBRARY_PATH=$ROOT/libs/$CONFIG
+export PATH=$ROOT/bins/$CONFIG:$ROOT/bins/$CONFIG/protobuf:$PATH
+export CFLAGS="-I$ROOT/include -std=c89"
+export LDFLAGS="-L$ROOT/libs/$CONFIG"
+export GRPC_PYTHON_BUILD_WITH_CYTHON=1
+export GRPC_PYTHON_ENABLE_CYTHON_TRACING=1
+
+cd $GRPCIO
+tox --notest
+
+$GRPCIO/.tox/py27/bin/python $GRPCIO/setup.py build
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 5feb4f0c38..37b631bd0d 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -60,14 +60,14 @@ class CXXLanguage:
     self.server_cwd = None
     self.safename = 'cxx'
 
-  def client_args(self):
-    return ['bins/opt/interop_client']
+  def client_cmd(self, args):
+    return ['bins/opt/interop_client'] + args
 
   def cloud_to_prod_env(self):
     return {}
 
-  def server_args(self):
-    return ['bins/opt/interop_server', '--use_tls=true']
+  def server_cmd(self, args):
+    return ['bins/opt/interop_server', '--use_tls=true'] + args
 
   def global_env(self):
     return {}
@@ -86,14 +86,14 @@ class CSharpLanguage:
     self.server_cwd = 'src/csharp/Grpc.IntegrationTesting.Server/bin/Debug'
     self.safename = str(self)
 
-  def client_args(self):
-    return ['mono', 'Grpc.IntegrationTesting.Client.exe']
+  def client_cmd(self, args):
+    return ['mono', 'Grpc.IntegrationTesting.Client.exe'] + args
 
   def cloud_to_prod_env(self):
     return _SSL_CERT_ENV
 
-  def server_args(self):
-    return ['mono', 'Grpc.IntegrationTesting.Server.exe', '--use_tls=true']
+  def server_cmd(self, args):
+    return ['mono', 'Grpc.IntegrationTesting.Server.exe', '--use_tls=true'] + args
 
   def global_env(self):
     return {}
@@ -112,14 +112,14 @@ class JavaLanguage:
     self.server_cwd = '../grpc-java'
     self.safename = str(self)
 
-  def client_args(self):
-    return ['./run-test-client.sh']
+  def client_cmd(self, args):
+    return ['./run-test-client.sh'] + args
 
   def cloud_to_prod_env(self):
     return {}
 
-  def server_args(self):
-    return ['./run-test-server.sh', '--use_tls=true']
+  def server_cmd(self, args):
+    return ['./run-test-server.sh', '--use_tls=true'] + args
 
   def global_env(self):
     return {}
@@ -139,14 +139,14 @@ class GoLanguage:
     self.server_cwd = '/go/src/google.golang.org/grpc/interop/server'
     self.safename = str(self)
 
-  def client_args(self):
-    return ['go', 'run', 'client.go']
+  def client_cmd(self, args):
+    return ['go', 'run', 'client.go'] + args
 
   def cloud_to_prod_env(self):
     return {}
 
-  def server_args(self):
-    return ['go', 'run', 'server.go', '--use_tls=true']
+  def server_cmd(self, args):
+    return ['go', 'run', 'server.go', '--use_tls=true'] + args
 
   def global_env(self):
     return {}
@@ -168,8 +168,8 @@ class Http2Client:
     self.client_cwd = None
     self.safename = str(self)
 
-  def client_args(self):
-    return ['tools/http2_interop/http2_interop.test', '-test.v']
+  def client_cmd(self, args):
+    return ['tools/http2_interop/http2_interop.test', '-test.v'] + args
 
   def cloud_to_prod_env(self):
     return {}
@@ -190,14 +190,14 @@ class NodeLanguage:
     self.server_cwd = None
     self.safename = str(self)
 
-  def client_args(self):
-    return ['node', 'src/node/interop/interop_client.js']
+  def client_cmd(self, args):
+    return ['node', 'src/node/interop/interop_client.js'] + args
 
   def cloud_to_prod_env(self):
     return _SSL_CERT_ENV
 
-  def server_args(self):
-    return ['node', 'src/node/interop/interop_server.js', '--use_tls=true']
+  def server_cmd(self, args):
+    return ['node', 'src/node/interop/interop_server.js', '--use_tls=true'] + args
 
   def global_env(self):
     return {}
@@ -215,8 +215,8 @@ class PHPLanguage:
     self.client_cwd = None
     self.safename = str(self)
 
-  def client_args(self):
-    return ['src/php/bin/interop_client.sh']
+  def client_cmd(self, args):
+    return ['src/php/bin/interop_client.sh'] + args
 
   def cloud_to_prod_env(self):
     return _SSL_CERT_ENV
@@ -238,14 +238,14 @@ class RubyLanguage:
     self.server_cwd = None
     self.safename = str(self)
 
-  def client_args(self):
-    return ['ruby', 'src/ruby/bin/interop/interop_client.rb']
+  def client_cmd(self, args):
+    return ['ruby', 'src/ruby/bin/interop/interop_client.rb'] + args
 
   def cloud_to_prod_env(self):
     return _SSL_CERT_ENV
 
-  def server_args(self):
-    return ['ruby', 'src/ruby/bin/interop/interop_server.rb', '--use_tls=true']
+  def server_cmd(self, args):
+    return ['ruby', 'src/ruby/bin/interop/interop_server.rb', '--use_tls=true'] + args
 
   def global_env(self):
     return {}
@@ -264,17 +264,29 @@ class PythonLanguage:
     self.server_cwd = None
     self.safename = str(self)
 
-  def client_args(self):
-    return ['python2.7_virtual_environment/bin/python', '-m', 'grpc_interop.client']
+  def client_cmd(self, args):
+    return [
+        'src/python/grpcio/.tox/py27/bin/python',
+        'src/python/grpcio/setup.py',
+        'run_interop',
+        '--client',
+        '--args=\'{}\''.format(' '.join(args))
+    ]
 
   def cloud_to_prod_env(self):
     return _SSL_CERT_ENV
 
-  def server_args(self):
-    return ['python2.7_virtual_environment/bin/python', '-m', 'grpc_interop.server', '--use_tls=true']
+  def server_cmd(self, args):
+    return [
+        'src/python/grpcio/.tox/py27/bin/python',
+        'src/python/grpcio/setup.py',
+        'run_interop',
+        '--server',
+        '--args=\'{}\''.format(' '.join(args) + ' --use_tls=true')
+    ]
 
   def global_env(self):
-    return {'LD_LIBRARY_PATH': 'libs/opt'}
+    return {'LD_LIBRARY_PATH': '{}/libs/opt'.format(DOCKER_WORKDIR_ROOT)}
 
   def unimplemented_test_cases(self):
     return ['jwt_token_creds', 'per_rpc_creds']
@@ -307,6 +319,8 @@ _AUTH_TEST_CASES = ['compute_engine_creds', 'jwt_token_creds',
 
 _HTTP2_TEST_CASES = ["tls", "framing"]
 
+DOCKER_WORKDIR_ROOT = '/var/local/git/grpc'
+
 def docker_run_cmdline(cmdline, image, docker_args=[], cwd=None, environ=None):
   """Wraps given cmdline array to create 'docker run' cmdline from it."""
   docker_cmdline = ['docker', 'run', '-i', '--rm=true']
@@ -317,7 +331,7 @@ def docker_run_cmdline(cmdline, image, docker_args=[], cwd=None, environ=None):
       docker_cmdline += ['-e', '%s=%s' % (k,v)]
 
   # set working directory
-  workdir = '/var/local/git/grpc'
+  workdir = DOCKER_WORKDIR_ROOT
   if cwd:
     workdir = os.path.join(workdir, cwd)
   docker_cmdline += ['-w', workdir]
@@ -334,12 +348,12 @@ def bash_login_cmdline(cmdline):
   return ['bash', '-l', '-c', ' '.join(cmdline)]
 
 
-def add_auth_options(language, test_case, cmdline, env):
+def auth_options(language, test_case):
   """Returns (cmdline, env) tuple with cloud_to_prod_auth test options."""
 
   language = str(language)
-  cmdline = list(cmdline)
-  env = env.copy()
+  cmdargs = []
+  env = {}
 
   # TODO(jtattermusch): this file path only works inside docker
   key_filepath = '/root/service_account/stubbyCloudTestingTest-ee3fce360ac5.json'
@@ -351,19 +365,19 @@ def add_auth_options(language, test_case, cmdline, env):
     if language in ['csharp', 'node', 'php', 'python', 'ruby']:
       env['GOOGLE_APPLICATION_CREDENTIALS'] = key_filepath
     else:
-      cmdline += [key_file_arg]
+      cmdargs += [key_file_arg]
 
   if test_case in ['per_rpc_creds', 'oauth2_auth_token']:
-    cmdline += [oauth_scope_arg]
+    cmdargs += [oauth_scope_arg]
 
   if test_case == 'oauth2_auth_token' and language == 'c++':
     # C++ oauth2 test uses GCE creds and thus needs to know the default account
-    cmdline += [default_account_arg]
+    cmdargs += [default_account_arg]
 
   if test_case == 'compute_engine_creds':
-    cmdline += [oauth_scope_arg, default_account_arg]
+    cmdargs += [oauth_scope_arg, default_account_arg]
 
-  return (cmdline, env)
+  return (cmdargs, env)
 
 
 def _job_kill_handler(job):
@@ -378,18 +392,20 @@ def _job_kill_handler(job):
 
 def cloud_to_prod_jobspec(language, test_case, docker_image=None, auth=False):
   """Creates jobspec for cloud-to-prod interop test"""
-  cmdline = language.client_args() + [
+  container_name = None
+  cmdargs = [
       '--server_host_override=grpc-test.sandbox.google.com',
       '--server_host=grpc-test.sandbox.google.com',
       '--server_port=443',
       '--use_tls=true',
       '--test_case=%s' % test_case]
-  cwd = language.client_cwd
   environ = dict(language.cloud_to_prod_env(), **language.global_env())
-  container_name = None
   if auth:
-    cmdline, environ = add_auth_options(language, test_case, cmdline, environ)
-  cmdline = bash_login_cmdline(cmdline)
+    auth_cmdargs, auth_env = auth_options(language, test_case)
+    cmdargs += auth_cmdargs
+    environ.update(auth_env)
+  cmdline = bash_login_cmdline(language.client_cmd(cmdargs))
+  cwd = language.client_cwd
 
   if docker_image:
     container_name = dockerjob.random_name('interop_client_%s' % language.safename)
@@ -419,13 +435,13 @@ def cloud_to_prod_jobspec(language, test_case, docker_image=None, auth=False):
 def cloud_to_cloud_jobspec(language, test_case, server_name, server_host,
                            server_port, docker_image=None):
   """Creates jobspec for cloud-to-cloud interop test"""
-  cmdline = bash_login_cmdline(language.client_args() +
-                               ['--server_host_override=foo.test.google.fr',
-                                '--use_tls=true',
-                                '--use_test_ca=true',
-                                '--test_case=%s' % test_case,
-                                '--server_host=%s' % server_host,
-                                '--server_port=%s' % server_port])
+  cmdline = bash_login_cmdline(language.client_cmd([
+      '--server_host_override=foo.test.google.fr',
+      '--use_tls=true',
+      '--use_test_ca=true',
+      '--test_case=%s' % test_case,
+      '--server_host=%s' % server_host,
+      '--server_port=%s' % server_port]))
   cwd = language.client_cwd
   environ = language.global_env()
   if docker_image:
@@ -455,8 +471,8 @@ def cloud_to_cloud_jobspec(language, test_case, server_name, server_host,
 def server_jobspec(language, docker_image):
   """Create jobspec for running a server"""
   container_name = dockerjob.random_name('interop_server_%s' % language.safename)
-  cmdline = bash_login_cmdline(language.server_args() +
-                               ['--port=%s' % _DEFAULT_SERVER_PORT])
+  cmdline = bash_login_cmdline(
+      language.server_cmd(['--port=%s' % _DEFAULT_SERVER_PORT]))
   environ = language.global_env()
   docker_cmdline = docker_run_cmdline(cmdline,
                                       image=docker_image,
@@ -547,7 +563,7 @@ argp.add_argument('--http2_interop',
                   action='store_const',
                   const=True,
                   help='Enable HTTP/2 interop tests')
-                  
+
 args = argp.parse_args()
 
 servers = set(s for s in itertools.chain.from_iterable(_SERVERS
@@ -571,7 +587,7 @@ languages = set(_LANGUAGES[l]
                 for l in itertools.chain.from_iterable(
                       _LANGUAGES.iterkeys() if x == 'all' else [x]
                       for x in args.language))
-                      
+
 http2Interop = Http2Client() if args.http2_interop else None
 
 docker_images={}
@@ -593,10 +609,10 @@ if args.use_docker:
     num_failures, _ = jobset.run(
         build_jobs, newline_on_success=True, maxjobs=args.jobs)
     if num_failures == 0:
-      jobset.message('SUCCESS', 'All docker images built successfully.', 
+      jobset.message('SUCCESS', 'All docker images built successfully.',
                      do_newline=True)
     else:
-      jobset.message('FAILED', 'Failed to build interop docker images.', 
+      jobset.message('FAILED', 'Failed to build interop docker images.',
                      do_newline=True)
       for image in docker_images.itervalues():
         dockerjob.remove_image(image, skip_nonexistent=True)
@@ -622,7 +638,7 @@ try:
           test_job = cloud_to_prod_jobspec(language, test_case,
                                            docker_image=docker_images.get(str(language)))
           jobs.append(test_job)
-          
+
     # TODO(carl-mastrangelo): Currently prod TLS terminators aren't spec compliant. Reenable
     # this once a better solution is in place.
     if args.http2_interop and False:
@@ -630,7 +646,7 @@ try:
         test_job = cloud_to_prod_jobspec(http2Interop, test_case,
                                          docker_image=docker_images.get(str(http2Interop)))
         jobs.append(test_job)
-     
+
 
   if args.cloud_to_prod_auth:
     for language in languages:
@@ -658,9 +674,12 @@ try:
                                             server_port,
                                             docker_image=docker_images.get(str(language)))
           jobs.append(test_job)
-          
+
     if args.http2_interop:
       for test_case in _HTTP2_TEST_CASES:
+        if server_name == "go":
+          # TODO(carl-mastrangelo): Reenable after https://github.com/grpc/grpc-go/issues/434
+          continue 
         test_job = cloud_to_cloud_jobspec(http2Interop,
                                           test_case,
                                           server_name,
@@ -675,7 +694,7 @@ try:
       dockerjob.remove_image(image, skip_nonexistent=True)
     sys.exit(1)
 
-  num_failures, resultset = jobset.run(jobs, newline_on_success=True, 
+  num_failures, resultset = jobset.run(jobs, newline_on_success=True,
                                        maxjobs=args.jobs)
   if num_failures:
     jobset.message('FAILED', 'Some tests failed', do_newline=True)
@@ -683,7 +702,7 @@ try:
     jobset.message('SUCCESS', 'All tests passed', do_newline=True)
 
   report_utils.render_junit_xml_report(resultset, 'report.xml')
-  
+
   report_utils.render_interop_html_report(
       set([str(l) for l in languages]), servers, _TEST_CASES, _AUTH_TEST_CASES, 
       _HTTP2_TEST_CASES, resultset, num_failures,
diff --git a/tools/run_tests/run_python.sh b/tools/run_tests/run_python.sh
index 848775e9b1..042b40485d 100755
--- a/tools/run_tests/run_python.sh
+++ b/tools/run_tests/run_python.sh
@@ -34,10 +34,18 @@ set -ex
 cd $(dirname $0)/../..
 
 ROOT=`pwd`
-GRPCIO_TEST=$ROOT/src/python/grpcio_test
+GRPCIO=$ROOT/src/python/grpcio
 export LD_LIBRARY_PATH=$ROOT/libs/$CONFIG
 export DYLD_LIBRARY_PATH=$ROOT/libs/$CONFIG
 export PATH=$ROOT/bins/$CONFIG:$ROOT/bins/$CONFIG/protobuf:$PATH
-source "python"$PYVER"_virtual_environment"/bin/activate
+export CFLAGS="-I$ROOT/include -std=c89"
+export LDFLAGS="-L$ROOT/libs/$CONFIG"
+export GRPC_PYTHON_BUILD_WITH_CYTHON=1
+export GRPC_PYTHON_ENABLE_CYTHON_TRACING=1
 
-"python"$PYVER $GRPCIO_TEST/setup.py test -a "-n8 --cov=grpc --junitxml=./report.xml --timeout=300 -v --boxed --timeout_method=thread"
+cd $GRPCIO
+tox
+
+mkdir -p $ROOT/reports
+rm -rf $ROOT/reports/python-coverage
+(mv -T $GRPCIO/htmlcov $ROOT/reports/python-coverage) || true
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index bb44a53cb9..09dd55d879 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -691,6 +691,34 @@
   {
     "deps": [
       "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "init_test", 
+    "src": [
+      "test/core/surface/init_test.c"
+    ]
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "invalid_call_argument_test", 
+    "src": [
+      "test/core/end2end/invalid_call_argument_test.c"
+    ]
+  }, 
+  {
+    "deps": [
+      "gpr", 
       "grpc"
     ], 
     "headers": [], 
@@ -793,20 +821,6 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "multi_init_test", 
-    "src": [
-      "test/core/surface/multi_init_test.c"
-    ]
-  }, 
-  {
-    "deps": [
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
     "name": "multiple_server_queues_test", 
     "src": [
       "test/core/end2end/multiple_server_queues_test.c"
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 22f7bd5fbb..43d22f38a6 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -789,7 +789,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "json_rewrite_test", 
+    "name": "init_test", 
     "platforms": [
       "linux", 
       "mac", 
@@ -807,7 +807,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "json_test", 
+    "name": "invalid_call_argument_test", 
     "platforms": [
       "linux", 
       "mac", 
@@ -825,7 +825,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "lame_client_test", 
+    "name": "json_rewrite_test", 
     "platforms": [
       "linux", 
       "mac", 
@@ -843,7 +843,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "lb_policies_test", 
+    "name": "json_test", 
     "platforms": [
       "linux", 
       "mac", 
@@ -861,7 +861,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "message_compress_test", 
+    "name": "lame_client_test", 
     "platforms": [
       "linux", 
       "mac", 
@@ -879,7 +879,25 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "multi_init_test", 
+    "name": "lb_policies_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
+  {
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "message_compress_test", 
     "platforms": [
       "linux", 
       "mac", 
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index 1bdde2d06d..ba4151c53a 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -1588,16 +1588,18 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "httpcli_parser_test", "vcxp
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_rewrite", "vcxproj\test\json_rewrite\json_rewrite.vcxproj", "{57B36FF6-25B1-2475-D07A-2E9097E2C792}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "init_test", "vcxproj\test\init_test\init_test.vcxproj", "{117CA7AD-C42B-9217-6C95-42A801777BC5}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
 	ProjectSection(ProjectDependencies) = postProject
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
 		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_rewrite_test", "vcxproj\test\json_rewrite_test\json_rewrite_test.vcxproj", "{DD4C2B4E-9C47-6AA4-8E16-7B69AF8FA1D2}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "invalid_call_argument_test", "vcxproj\test\invalid_call_argument_test\invalid_call_argument_test.vcxproj", "{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1608,7 +1610,16 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_rewrite_test", "vcxpro
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_test", "vcxproj\test\json_test\json_test.vcxproj", "{05230AC7-4529-E6CF-0506-A063B5FF6642}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_rewrite", "vcxproj\test\json_rewrite\json_rewrite.vcxproj", "{57B36FF6-25B1-2475-D07A-2E9097E2C792}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_rewrite_test", "vcxproj\test\json_rewrite_test\json_rewrite_test.vcxproj", "{DD4C2B4E-9C47-6AA4-8E16-7B69AF8FA1D2}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1619,7 +1630,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_test", "vcxproj\test\j
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lame_client_test", "vcxproj\test\lame_client_test\lame_client_test.vcxproj", "{6E60B394-E17D-658A-6648-A2E6E183226F}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "json_test", "vcxproj\test\json_test\json_test.vcxproj", "{05230AC7-4529-E6CF-0506-A063B5FF6642}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1630,7 +1641,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lame_client_test", "vcxproj
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lb_policies_test", "vcxproj\test\lb_policies_test\lb_policies_test.vcxproj", "{62D58A08-3B5E-D6A8-ABBB-77995AA0A8C6}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lame_client_test", "vcxproj\test\lame_client_test\lame_client_test.vcxproj", "{6E60B394-E17D-658A-6648-A2E6E183226F}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1641,7 +1652,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lb_policies_test", "vcxproj
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "message_compress_test", "vcxproj\test\message_compress_test\message_compress_test.vcxproj", "{07170557-CCB0-D23C-8018-C2909D115DF9}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lb_policies_test", "vcxproj\test\lb_policies_test\lb_policies_test.vcxproj", "{62D58A08-3B5E-D6A8-ABBB-77995AA0A8C6}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1652,7 +1663,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "message_compress_test", "vc
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "multi_init_test", "vcxproj\test\multi_init_test\multi_init_test.vcxproj", "{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "message_compress_test", "vcxproj\test\message_compress_test\message_compress_test.vcxproj", "{07170557-CCB0-D23C-8018-C2909D115DF9}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -12265,6 +12276,38 @@ Global
 		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release-DLL|Win32.Build.0 = Release|Win32
 		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release-DLL|x64.ActiveCfg = Release|x64
 		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release-DLL|x64.Build.0 = Release|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug|Win32.ActiveCfg = Debug|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug|x64.ActiveCfg = Debug|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release|Win32.ActiveCfg = Release|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release|x64.ActiveCfg = Release|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug|Win32.Build.0 = Debug|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug|x64.Build.0 = Debug|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release|Win32.Build.0 = Release|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release|x64.Build.0 = Release|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug-DLL|x64.Build.0 = Debug|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release-DLL|Win32.Build.0 = Release|Win32
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release-DLL|x64.ActiveCfg = Release|x64
+		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release-DLL|x64.Build.0 = Release|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug|Win32.ActiveCfg = Debug|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug|x64.ActiveCfg = Debug|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release|Win32.ActiveCfg = Release|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release|x64.ActiveCfg = Release|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug|Win32.Build.0 = Debug|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug|x64.Build.0 = Debug|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release|Win32.Build.0 = Release|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release|x64.Build.0 = Release|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Debug-DLL|x64.Build.0 = Debug|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release-DLL|Win32.Build.0 = Release|Win32
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release-DLL|x64.ActiveCfg = Release|x64
+		{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}.Release-DLL|x64.Build.0 = Release|x64
 		{57B36FF6-25B1-2475-D07A-2E9097E2C792}.Debug|Win32.ActiveCfg = Debug|Win32
 		{57B36FF6-25B1-2475-D07A-2E9097E2C792}.Debug|x64.ActiveCfg = Debug|x64
 		{57B36FF6-25B1-2475-D07A-2E9097E2C792}.Release|Win32.ActiveCfg = Release|Win32
@@ -12361,22 +12404,6 @@ Global
 		{07170557-CCB0-D23C-8018-C2909D115DF9}.Release-DLL|Win32.Build.0 = Release|Win32
 		{07170557-CCB0-D23C-8018-C2909D115DF9}.Release-DLL|x64.ActiveCfg = Release|x64
 		{07170557-CCB0-D23C-8018-C2909D115DF9}.Release-DLL|x64.Build.0 = Release|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug|Win32.ActiveCfg = Debug|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug|x64.ActiveCfg = Debug|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release|Win32.ActiveCfg = Release|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release|x64.ActiveCfg = Release|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug|Win32.Build.0 = Debug|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug|x64.Build.0 = Debug|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release|Win32.Build.0 = Release|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release|x64.Build.0 = Release|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Debug-DLL|x64.Build.0 = Debug|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release-DLL|Win32.Build.0 = Release|Win32
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release-DLL|x64.ActiveCfg = Release|x64
-		{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}.Release-DLL|x64.Build.0 = Release|x64
 		{88AF688E-E43C-5E20-6966-CF559F597D82}.Debug|Win32.ActiveCfg = Debug|Win32
 		{88AF688E-E43C-5E20-6966-CF559F597D82}.Debug|x64.ActiveCfg = Debug|x64
 		{88AF688E-E43C-5E20-6966-CF559F597D82}.Release|Win32.ActiveCfg = Release|Win32
diff --git a/vsprojects/vcxproj/test/multi_init_test/multi_init_test.vcxproj b/vsprojects/vcxproj/test/init_test/init_test.vcxproj
index d4ef5a1e69..9653c936d6 100644
--- a/vsprojects/vcxproj/test/multi_init_test/multi_init_test.vcxproj
+++ b/vsprojects/vcxproj/test/init_test/init_test.vcxproj
@@ -20,7 +20,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
-    <ProjectGuid>{26D0B11B-FCB4-6527-4B5E-FC2A51BE5FB9}</ProjectGuid>
+    <ProjectGuid>{117CA7AD-C42B-9217-6C95-42A801777BC5}</ProjectGuid>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
@@ -55,13 +55,13 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)'=='Debug'">
-    <TargetName>multi_init_test</TargetName>
+    <TargetName>init_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)'=='Release'">
-    <TargetName>multi_init_test</TargetName>
+    <TargetName>init_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
@@ -143,7 +143,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ClCompile Include="..\..\..\..\test\core\surface\multi_init_test.c">
+    <ClCompile Include="..\..\..\..\test\core\surface\init_test.c">
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/multi_init_test/multi_init_test.vcxproj.filters b/vsprojects/vcxproj/test/init_test/init_test.vcxproj.filters
index e1e8efc831..9188683c11 100644
--- a/vsprojects/vcxproj/test/multi_init_test/multi_init_test.vcxproj.filters
+++ b/vsprojects/vcxproj/test/init_test/init_test.vcxproj.filters
@@ -1,20 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="..\..\..\..\test\core\surface\multi_init_test.c">
+    <ClCompile Include="..\..\..\..\test\core\surface\init_test.c">
       <Filter>test\core\surface</Filter>
     </ClCompile>
   </ItemGroup>
 
   <ItemGroup>
     <Filter Include="test">
-      <UniqueIdentifier>{9fd58330-04b7-e69b-7217-2b6df7135781}</UniqueIdentifier>
+      <UniqueIdentifier>{a29deb69-37b5-31c0-c4a2-da409b5fe7ac}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core">
-      <UniqueIdentifier>{a1129343-c108-ef14-75a6-89805909cda1}</UniqueIdentifier>
+      <UniqueIdentifier>{cecabaca-db86-b86c-3ad7-ad6fc6958f15}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core\surface">
-      <UniqueIdentifier>{7b12af46-5c98-9a39-b0db-82bdc9fb52d2}</UniqueIdentifier>
+      <UniqueIdentifier>{93a3608f-710d-f929-fa89-6f762d06cb4c}</UniqueIdentifier>
     </Filter>
   </ItemGroup>
 </Project>
diff --git a/vsprojects/vcxproj/test/invalid_call_argument_test/invalid_call_argument_test.vcxproj b/vsprojects/vcxproj/test/invalid_call_argument_test/invalid_call_argument_test.vcxproj
new file mode 100644
index 0000000000..427687dc57
--- /dev/null
+++ b/vsprojects/vcxproj/test/invalid_call_argument_test/invalid_call_argument_test.vcxproj
@@ -0,0 +1,184 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{C32CA8A3-58E6-8EB9-B72F-C295547D36A6}</ProjectGuid>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\..\..\..\vsprojects\global.props" />
+    <Import Project="..\..\..\..\vsprojects\openssl.props" />
+    <Import Project="..\..\..\..\vsprojects\winsock.props" />
+    <Import Project="..\..\..\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>invalid_call_argument_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>invalid_call_argument_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;_USE_32BIT_TIME_T;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;_USE_32BIT_TIME_T;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\..\test\core\end2end\invalid_call_argument_test.c">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\..\vsprojects\vcxproj\.\grpc_test_util\grpc_test_util.vcxproj">
+      <Project>{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}</Project>
+    </ProjectReference>
+    <ProjectReference Include="..\..\..\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
+      <Project>{29D16885-7228-4C31-81ED-5F9187C7F2A9}</Project>
+    </ProjectReference>
+    <ProjectReference Include="..\..\..\..\vsprojects\vcxproj\.\gpr_test_util\gpr_test_util.vcxproj">
+      <Project>{EAB0A629-17A9-44DB-B5FF-E91A721FE037}</Project>
+    </ProjectReference>
+    <ProjectReference Include="..\..\..\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
+      <Project>{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" />
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" />
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" />
+    <Error Condition="!Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
+  </Target>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/invalid_call_argument_test/invalid_call_argument_test.vcxproj.filters b/vsprojects/vcxproj/test/invalid_call_argument_test/invalid_call_argument_test.vcxproj.filters
new file mode 100644
index 0000000000..a13db9dcb1
--- /dev/null
+++ b/vsprojects/vcxproj/test/invalid_call_argument_test/invalid_call_argument_test.vcxproj.filters
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="..\..\..\..\test\core\end2end\invalid_call_argument_test.c">
+      <Filter>test\core\end2end</Filter>
+    </ClCompile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Filter Include="test">
+      <UniqueIdentifier>{d5718e1e-f9c3-5b35-6b92-0309cc63bcf3}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\core">
+      <UniqueIdentifier>{f192acd9-1a23-2b42-3be6-6dd97ffc4778}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="test\core\end2end">
+      <UniqueIdentifier>{b3e4e7e4-425a-9fc6-6771-7ac8cc4d78eb}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>
+