288 files changed, 1012 insertions, 777 deletions

diff --git a/test/core/backoff/backoff_test.c b/test/core/backoff/backoff_test.cc
index a29cce6cc7..a29cce6cc7 100644
--- a/test/core/backoff/backoff_test.c
+++ b/test/core/backoff/backoff_test.cc
diff --git a/test/core/bad_client/bad_client.c b/test/core/bad_client/bad_client.cc
index b7b28a9ac4..b7b28a9ac4 100644
--- a/test/core/bad_client/bad_client.c
+++ b/test/core/bad_client/bad_client.cc
diff --git a/test/core/bad_client/gen_build_yaml.py b/test/core/bad_client/gen_build_yaml.py
index 61cf1f7cd7..14c8a27334 100755
--- a/test/core/bad_client/gen_build_yaml.py
+++ b/test/core/bad_client/gen_build_yaml.py
@@ -46,7 +46,7 @@ def main():
             'build': 'private',
             'language': 'c',
             'src': [
-              'test/core/bad_client/bad_client.c'
+              'test/core/bad_client/bad_client.cc'
             ],
             'headers': [
               'test/core/bad_client/bad_client.h'
@@ -66,7 +66,7 @@ def main():
               'build': 'test',
               'language': 'c',
               'secure': 'no',
-              'src': ['test/core/bad_client/tests/%s.c' % t],
+              'src': ['test/core/bad_client/tests/%s.cc' % t],
               'vs_proj_dir': 'test',
               'exclude_iomgrs': ['uv'],
               'deps': [
diff --git a/test/core/bad_client/generate_tests.bzl b/test/core/bad_client/generate_tests.bzl
index 58b48d688f..cdea9cc2d1 100755
--- a/test/core/bad_client/generate_tests.bzl
+++ b/test/core/bad_client/generate_tests.bzl
@@ -38,7 +38,7 @@ BAD_CLIENT_TESTS = {
 def grpc_bad_client_tests():
   native.cc_library(
       name = 'bad_client_test',
-      srcs = ['bad_client.c'],
+      srcs = ['bad_client.cc'],
       hdrs = ['bad_client.h'],
       copts = ['-std=c99'],
       deps = ['//test/core/util:grpc_test_util', '//:grpc', '//:gpr', '//test/core/end2end:cq_verifier']
@@ -46,7 +46,7 @@ def grpc_bad_client_tests():
   for t, topt in BAD_CLIENT_TESTS.items():
     native.cc_test(
         name = '%s_bad_client_test' % t,
-        srcs = ['tests/%s.c' % t],
+        srcs = ['tests/%s.cc' % t],
         deps = [':bad_client_test'],
         copts = ['-std=c99'],
     )
diff --git a/test/core/bad_client/tests/badreq.c b/test/core/bad_client/tests/badreq.cc
index 7d9a103e43..7d9a103e43 100644
--- a/test/core/bad_client/tests/badreq.c
+++ b/test/core/bad_client/tests/badreq.cc
diff --git a/test/core/bad_client/tests/connection_prefix.c b/test/core/bad_client/tests/connection_prefix.cc
index 6cc4b72314..6cc4b72314 100644
--- a/test/core/bad_client/tests/connection_prefix.c
+++ b/test/core/bad_client/tests/connection_prefix.cc
diff --git a/test/core/bad_client/tests/head_of_line_blocking.c b/test/core/bad_client/tests/head_of_line_blocking.cc
index 04485d501f..cb89423907 100644
--- a/test/core/bad_client/tests/head_of_line_blocking.c
+++ b/test/core/bad_client/tests/head_of_line_blocking.cc
@@ -100,7 +100,7 @@ size_t g_count = 0;
 static void addbuf(const void *data, size_t len) {
   if (g_count + len > g_cap) {
     g_cap = GPR_MAX(g_count + len, g_cap * 2);
-    g_buffer = gpr_realloc(g_buffer, g_cap);
+    g_buffer = static_cast<char *>(gpr_realloc(g_buffer, g_cap));
   }
   memcpy(g_buffer + g_count, data, len);
   g_count += len;
diff --git a/test/core/bad_client/tests/headers.c b/test/core/bad_client/tests/headers.cc
index c704dbbcb6..c704dbbcb6 100644
--- a/test/core/bad_client/tests/headers.c
+++ b/test/core/bad_client/tests/headers.cc
diff --git a/test/core/bad_client/tests/initial_settings_frame.c b/test/core/bad_client/tests/initial_settings_frame.cc
index 0696ef9383..0696ef9383 100644
--- a/test/core/bad_client/tests/initial_settings_frame.c
+++ b/test/core/bad_client/tests/initial_settings_frame.cc
diff --git a/test/core/bad_client/tests/large_metadata.c b/test/core/bad_client/tests/large_metadata.cc
index ca3d234be9..ca3d234be9 100644
--- a/test/core/bad_client/tests/large_metadata.c
+++ b/test/core/bad_client/tests/large_metadata.cc
diff --git a/test/core/bad_client/tests/server_registered_method.c b/test/core/bad_client/tests/server_registered_method.cc
index f52350302b..f52350302b 100644
--- a/test/core/bad_client/tests/server_registered_method.c
+++ b/test/core/bad_client/tests/server_registered_method.cc
diff --git a/test/core/bad_client/tests/simple_request.c b/test/core/bad_client/tests/simple_request.cc
index a516632819..a516632819 100644
--- a/test/core/bad_client/tests/simple_request.c
+++ b/test/core/bad_client/tests/simple_request.cc
diff --git a/test/core/bad_client/tests/unknown_frame.c b/test/core/bad_client/tests/unknown_frame.cc
index 448803d12b..448803d12b 100644
--- a/test/core/bad_client/tests/unknown_frame.c
+++ b/test/core/bad_client/tests/unknown_frame.cc
diff --git a/test/core/bad_client/tests/window_overflow.c b/test/core/bad_client/tests/window_overflow.cc
index e4b5f9711b..40552e5345 100644
--- a/test/core/bad_client/tests/window_overflow.c
+++ b/test/core/bad_client/tests/window_overflow.cc
@@ -58,7 +58,7 @@ size_t g_count = 0;
 static void addbuf(const void *data, size_t len) {
   if (g_count + len > g_cap) {
     g_cap = GPR_MAX(g_count + len, g_cap * 2);
-    g_buffer = gpr_realloc(g_buffer, g_cap);
+    g_buffer = static_cast<char *>(gpr_realloc(g_buffer, g_cap));
   }
   memcpy(g_buffer + g_count, data, len);
   g_count += len;
diff --git a/test/core/bad_ssl/bad_ssl_test.c b/test/core/bad_ssl/bad_ssl_test.cc
index 793627bcdc..2183fbb633 100644
--- a/test/core/bad_ssl/bad_ssl_test.c
+++ b/test/core/bad_ssl/bad_ssl_test.cc
@@ -52,9 +52,10 @@ static void run_test(const char *target, size_t nops) {
   grpc_op ops[6];
   grpc_op *op;
 
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args args;
 
   args.num_args = 1;
@@ -141,7 +142,7 @@ int main(int argc, char **argv) {
   /* start the server */
   gpr_asprintf(&args[0], "%s/bad_ssl_%s_server%s", root, test,
                gpr_subprocess_binary_extension());
-  args[1] = "--bind";
+  args[1] = const_cast<char *>("--bind");
   gpr_join_host_port(&args[2], "::", port);
   svr = gpr_subprocess_create(4, (const char **)args);
   gpr_free(args[0]);
diff --git a/test/core/bad_ssl/gen_build_yaml.py b/test/core/bad_ssl/gen_build_yaml.py
index 30fdb5ea02..6b78e9c7aa 100755
--- a/test/core/bad_ssl/gen_build_yaml.py
+++ b/test/core/bad_ssl/gen_build_yaml.py
@@ -38,7 +38,7 @@ def main():
               'name': 'bad_ssl_test_server',
               'build': 'private',
               'language': 'c',
-              'src': ['test/core/bad_ssl/server_common.c'],
+              'src': ['test/core/bad_ssl/server_common.cc'],
               'headers': ['test/core/bad_ssl/server_common.h'],
               'vs_proj_dir': 'test',
               'platforms': ['linux', 'posix', 'mac'],
@@ -56,7 +56,7 @@ def main():
               'build': 'test',
               'language': 'c',
               'run': False,
-              'src': ['test/core/bad_ssl/servers/%s.c' % t],
+              'src': ['test/core/bad_ssl/servers/%s.cc' % t],
               'vs_proj_dir': 'test/bad_ssl',
               'platforms': ['linux', 'posix', 'mac'],
               'deps': [
@@ -73,7 +73,7 @@ def main():
               'cpu_cost': BAD_CLIENT_TESTS[t].cpu_cost,
               'build': 'test',
               'language': 'c',
-              'src': ['test/core/bad_ssl/bad_ssl_test.c'],
+              'src': ['test/core/bad_ssl/bad_ssl_test.cc'],
               'vs_proj_dir': 'test',
               'platforms': ['linux', 'posix', 'mac'],
               'deps': [
diff --git a/test/core/bad_ssl/generate_tests.bzl b/test/core/bad_ssl/generate_tests.bzl
index b61fabc051..b7cb8f86e6 100755
--- a/test/core/bad_ssl/generate_tests.bzl
+++ b/test/core/bad_ssl/generate_tests.bzl
@@ -24,14 +24,14 @@ BAD_SSL_TESTS = ['cert', 'alpn']
 def grpc_bad_ssl_tests():
   native.cc_library(
       name = 'bad_ssl_test_server',
-      srcs = ['server_common.c'],
+      srcs = ['server_common.cc'],
       hdrs = ['server_common.h'],
       deps = ['//test/core/util:grpc_test_util', '//:grpc', '//test/core/end2end:ssl_test_data']
   )
   for t in BAD_SSL_TESTS:
     native.cc_test(
         name = 'bad_ssl_%s_server' % t,
-        srcs = ['servers/%s.c' % t],
+        srcs = ['servers/%s.cc' % t],
         deps = [':bad_ssl_test_server'],
     )
 
diff --git a/test/core/bad_ssl/server_common.c b/test/core/bad_ssl/server_common.cc
index 0588d43c38..5def618257 100644
--- a/test/core/bad_ssl/server_common.c
+++ b/test/core/bad_ssl/server_common.cc
@@ -34,7 +34,7 @@ static void sigint_handler(int x) { got_sigint = 1; }
 
 const char *bad_ssl_addr(int argc, char **argv) {
   gpr_cmdline *cl;
-  char *addr = NULL;
+  const char *addr = NULL;
   cl = gpr_cmdline_create("test server");
   gpr_cmdline_add_string(cl, "bind", "Bind host:port", &addr);
   gpr_cmdline_parse(cl, argc, argv);
diff --git a/test/core/bad_ssl/servers/alpn.c b/test/core/bad_ssl/servers/alpn.cc
index 3179054aff..3179054aff 100644
--- a/test/core/bad_ssl/servers/alpn.c
+++ b/test/core/bad_ssl/servers/alpn.cc
diff --git a/test/core/bad_ssl/servers/cert.c b/test/core/bad_ssl/servers/cert.cc
index a1f3048164..a1f3048164 100644
--- a/test/core/bad_ssl/servers/cert.c
+++ b/test/core/bad_ssl/servers/cert.cc
diff --git a/test/core/census/context_test.c b/test/core/census/context_test.cc
index ca5a6ec5cd..ca5a6ec5cd 100644
--- a/test/core/census/context_test.c
+++ b/test/core/census/context_test.cc
diff --git a/test/core/census/intrusive_hash_map_test.c b/test/core/census/intrusive_hash_map_test.cc
index 0826b55c63..0826b55c63 100644
--- a/test/core/census/intrusive_hash_map_test.c
+++ b/test/core/census/intrusive_hash_map_test.cc
diff --git a/test/core/census/mlog_test.c b/test/core/census/mlog_test.cc
index 968fd91da4..968fd91da4 100644
--- a/test/core/census/mlog_test.c
+++ b/test/core/census/mlog_test.cc
diff --git a/test/core/census/resource_test.c b/test/core/census/resource_test.cc
index 48fc43e45b..48fc43e45b 100644
--- a/test/core/census/resource_test.c
+++ b/test/core/census/resource_test.cc
diff --git a/test/core/census/trace_context_test.c b/test/core/census/trace_context_test.cc
index 6eb831a85e..6eb831a85e 100644
--- a/test/core/census/trace_context_test.c
+++ b/test/core/census/trace_context_test.cc
diff --git a/test/core/channel/channel_args_test.c b/test/core/channel/channel_args_test.cc
index deaf2933ec..08dd1f47e3 100644
--- a/test/core/channel/channel_args_test.c
+++ b/test/core/channel/channel_args_test.cc
@@ -33,13 +33,13 @@ static void test_create(void) {
   grpc_arg to_add[2];
   grpc_channel_args *ch_args;
 
-  arg_int.key = "int_arg";
+  arg_int.key = const_cast<char *>("int_arg");
   arg_int.type = GRPC_ARG_INTEGER;
   arg_int.value.integer = 123;
 
-  arg_string.key = "str key";
+  arg_string.key = const_cast<char *>("str key");
   arg_string.type = GRPC_ARG_STRING;
-  arg_string.value.string = "str value";
+  arg_string.value.string = const_cast<char *>("str value");
 
   to_add[0] = arg_int;
   to_add[1] = arg_string;
diff --git a/test/core/channel/channel_stack_builder_test.c b/test/core/channel/channel_stack_builder_test.cc
index 682efd1438..f9129605e9 100644
--- a/test/core/channel/channel_stack_builder_test.c
+++ b/test/core/channel/channel_stack_builder_test.cc
@@ -63,7 +63,7 @@ bool g_replacement_fn_called = false;
 bool g_original_fn_called = false;
 void set_arg_once_fn(grpc_channel_stack *channel_stack,
                      grpc_channel_element *elem, void *arg) {
-  bool *called = arg;
+  bool *called = static_cast<bool *>(arg);
   // Make sure this function is only called once per arg.
   GPR_ASSERT(*called == false);
   *called = true;
@@ -109,7 +109,8 @@ const grpc_channel_filter original_filter = {
 static bool add_replacement_filter(grpc_exec_ctx *exec_ctx,
                                    grpc_channel_stack_builder *builder,
                                    void *arg) {
-  const grpc_channel_filter *filter = arg;
+  const grpc_channel_filter *filter =
+      static_cast<const grpc_channel_filter *>(arg);
   // Get rid of any other version of the filter, as determined by having the
   // same name.
   GPR_ASSERT(grpc_channel_stack_builder_remove_filter(builder, filter->name));
diff --git a/test/core/channel/channel_stack_test.c b/test/core/channel/channel_stack_test.cc
index a07ef89ba8..88007375b2 100644
--- a/test/core/channel/channel_stack_test.c
+++ b/test/core/channel/channel_stack_test.cc
@@ -69,12 +69,13 @@ static void channel_func(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
 
 static void free_channel(grpc_exec_ctx *exec_ctx, void *arg,
                          grpc_error *error) {
-  grpc_channel_stack_destroy(exec_ctx, arg);
+  grpc_channel_stack_destroy(exec_ctx, static_cast<grpc_channel_stack *>(arg));
   gpr_free(arg);
 }
 
 static void free_call(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  grpc_call_stack_destroy(exec_ctx, arg, NULL, NULL);
+  grpc_call_stack_destroy(exec_ctx, static_cast<grpc_call_stack *>(arg), NULL,
+                          NULL);
   gpr_free(arg);
 }
 
@@ -104,13 +105,14 @@ static void test_create_channel_stack(void) {
   grpc_slice path = grpc_slice_from_static_string("/service/method");
 
   arg.type = GRPC_ARG_INTEGER;
-  arg.key = "test_key";
+  arg.key = const_cast<char *>("test_key");
   arg.value.integer = 42;
 
   chan_args.num_args = 1;
   chan_args.args = &arg;
 
-  channel_stack = gpr_malloc(grpc_channel_stack_size(&filters, 1));
+  channel_stack = static_cast<grpc_channel_stack *>(
+      gpr_malloc(grpc_channel_stack_size(&filters, 1)));
   grpc_channel_stack_init(&exec_ctx, 1, free_channel, channel_stack, &filters,
                           1, &chan_args, NULL, "test", channel_stack);
   GPR_ASSERT(channel_stack->count == 1);
@@ -118,15 +120,18 @@ static void test_create_channel_stack(void) {
   channel_data = (int *)channel_elem->channel_data;
   GPR_ASSERT(*channel_data == 0);
 
-  call_stack = gpr_malloc(channel_stack->call_stack_size);
+  call_stack = static_cast<grpc_call_stack *>(
+      gpr_malloc(channel_stack->call_stack_size));
   const grpc_call_element_args args = {
-      .call_stack = call_stack,
-      .server_transport_data = NULL,
-      .context = NULL,
-      .path = path,
-      .start_time = gpr_now(GPR_CLOCK_MONOTONIC),
-      .deadline = GRPC_MILLIS_INF_FUTURE,
-      .arena = NULL};
+      call_stack,                   /* call_stack */
+      nullptr,                      /* server_transport_data */
+      nullptr,                      /* context */
+      path,                         /* path */
+      gpr_now(GPR_CLOCK_MONOTONIC), /* start_time */
+      GRPC_MILLIS_INF_FUTURE,       /* deadline */
+      nullptr,                      /* arena */
+      nullptr                       /* call_combiner */
+  };
   grpc_error *error = grpc_call_stack_init(&exec_ctx, channel_stack, 1,
                                            free_call, call_stack, &args);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
diff --git a/test/core/channel/minimal_stack_is_minimal_test.c b/test/core/channel/minimal_stack_is_minimal_test.cc
index b4528346f7..be6670c368 100644
--- a/test/core/channel/minimal_stack_is_minimal_test.c
+++ b/test/core/channel/minimal_stack_is_minimal_test.cc
@@ -61,11 +61,11 @@ int main(int argc, char **argv) {
   int errors = 0;
 
   // tests with a minimal stack
-  grpc_arg minimal_stack_arg = {.type = GRPC_ARG_INTEGER,
-                                .key = GRPC_ARG_MINIMAL_STACK,
-                                .value.integer = 1};
-  grpc_channel_args minimal_stack_args = {.num_args = 1,
-                                          .args = &minimal_stack_arg};
+  grpc_arg minimal_stack_arg;
+  minimal_stack_arg.type = GRPC_ARG_INTEGER;
+  minimal_stack_arg.key = const_cast<char *>(GRPC_ARG_MINIMAL_STACK);
+  minimal_stack_arg.value.integer = 1;
+  grpc_channel_args minimal_stack_args = {1, &minimal_stack_arg};
   errors += CHECK_STACK("unknown", &minimal_stack_args,
                         GRPC_CLIENT_DIRECT_CHANNEL, "connected", NULL);
   errors += CHECK_STACK("unknown", &minimal_stack_args, GRPC_CLIENT_SUBCHANNEL,
@@ -114,7 +114,9 @@ static int check_stack(const char *file, int line, const char *transport_name,
                        unsigned channel_stack_type, ...) {
   // create dummy channel stack
   grpc_channel_stack_builder *builder = grpc_channel_stack_builder_create();
-  grpc_transport_vtable fake_transport_vtable = {.name = transport_name};
+  grpc_transport_vtable fake_transport_vtable;
+  memset(&fake_transport_vtable, 0, sizeof(grpc_transport_vtable));
+  fake_transport_vtable.name = transport_name;
   grpc_transport fake_transport = {.vtable = &fake_transport_vtable};
   grpc_channel_stack_builder_set_target(builder, "foo.test.google.fr");
   grpc_channel_args *channel_args = grpc_channel_args_copy(init_args);
@@ -194,7 +196,9 @@ static int check_stack(const char *file, int line, const char *transport_name,
             "**************************************************");
     gpr_log(file, line, GPR_LOG_SEVERITY_ERROR,
             "FAILED transport=%s; stack_type=%s; channel_args=%s:",
-            transport_name, grpc_channel_stack_type_string(channel_stack_type),
+            transport_name,
+            grpc_channel_stack_type_string(
+                static_cast<grpc_channel_stack_type>(channel_stack_type)),
             args_str);
     gpr_log(file, line, GPR_LOG_SEVERITY_ERROR, "EXPECTED: %s", expect);
     gpr_log(file, line, GPR_LOG_SEVERITY_ERROR, "GOT:      %s", got);
diff --git a/test/core/client_channel/lb_policies_test.c b/test/core/client_channel/lb_policies_test.cc
index ba37cd673f..4379af11da 100644
--- a/test/core/client_channel/lb_policies_test.c
+++ b/test/core/client_channel/lb_policies_test.cc
@@ -88,14 +88,16 @@ static test_spec *test_spec_create(size_t num_iters, size_t num_servers) {
   test_spec *spec;
   size_t i;
 
-  spec = gpr_malloc(sizeof(test_spec));
+  spec = static_cast<test_spec *>(gpr_malloc(sizeof(test_spec)));
   spec->num_iters = num_iters;
   spec->num_servers = num_servers;
-  spec->kill_at = gpr_malloc(sizeof(int *) * num_iters);
-  spec->revive_at = gpr_malloc(sizeof(int *) * num_iters);
+  spec->kill_at = static_cast<int **>(gpr_malloc(sizeof(int *) * num_iters));
+  spec->revive_at = static_cast<int **>(gpr_malloc(sizeof(int *) * num_iters));
   for (i = 0; i < num_iters; i++) {
-    spec->kill_at[i] = gpr_malloc(sizeof(int) * num_servers);
-    spec->revive_at[i] = gpr_malloc(sizeof(int) * num_servers);
+    spec->kill_at[i] =
+        static_cast<int *>(gpr_malloc(sizeof(int) * num_servers));
+    spec->revive_at[i] =
+        static_cast<int *>(gpr_malloc(sizeof(int) * num_servers));
   }
 
   test_spec_reset(spec);
@@ -172,16 +174,20 @@ static void revive_server(const servers_fixture *f, request_data *rdata,
 static servers_fixture *setup_servers(const char *server_host,
                                       request_data *rdata,
                                       const size_t num_servers) {
-  servers_fixture *f = gpr_malloc(sizeof(servers_fixture));
+  servers_fixture *f =
+      static_cast<servers_fixture *>(gpr_malloc(sizeof(servers_fixture)));
   size_t i;
 
   f->num_servers = num_servers;
-  f->server_calls = gpr_malloc(sizeof(grpc_call *) * num_servers);
-  f->request_metadata_recv =
-      gpr_malloc(sizeof(grpc_metadata_array) * num_servers);
+  f->server_calls =
+      static_cast<grpc_call **>(gpr_malloc(sizeof(grpc_call *) * num_servers));
+  f->request_metadata_recv = static_cast<grpc_metadata_array *>(
+      gpr_malloc(sizeof(grpc_metadata_array) * num_servers));
   /* Create servers. */
-  f->servers = gpr_malloc(sizeof(grpc_server *) * num_servers);
-  f->servers_hostports = gpr_malloc(sizeof(char *) * num_servers);
+  f->servers = static_cast<grpc_server **>(
+      gpr_malloc(sizeof(grpc_server *) * num_servers));
+  f->servers_hostports =
+      static_cast<char **>(gpr_malloc(sizeof(char *) * num_servers));
   f->cq = grpc_completion_queue_create_for_next(NULL);
   f->shutdown_cq = grpc_completion_queue_create_for_pluck(NULL);
   for (i = 0; i < num_servers; i++) {
@@ -226,8 +232,10 @@ static void teardown_servers(servers_fixture *f) {
 static request_sequences request_sequences_create(size_t n) {
   request_sequences res;
   res.n = n;
-  res.connections = gpr_malloc(sizeof(*res.connections) * n);
-  res.connectivity_states = gpr_malloc(sizeof(*res.connectivity_states) * n);
+  res.connections =
+      static_cast<int *>(gpr_malloc(sizeof(*res.connections) * n));
+  res.connectivity_states =
+      static_cast<int *>(gpr_malloc(sizeof(*res.connectivity_states) * n));
   memset(res.connections, 0, sizeof(*res.connections) * n);
   memset(res.connectivity_states, 0, sizeof(*res.connectivity_states) * n);
   return res;
@@ -255,7 +263,7 @@ static request_sequences perform_request(servers_fixture *f,
   int completed_client;
   const request_sequences sequences = request_sequences_create(spec->num_iters);
 
-  s_valid = gpr_malloc(sizeof(int) * f->num_servers);
+  s_valid = static_cast<int *>(gpr_malloc(sizeof(int) * f->num_servers));
 
   for (iter_num = 0; iter_num < spec->num_iters; iter_num++) {
     cq_verifier *cqv = cq_verifier_create(f->cq);
@@ -426,7 +434,8 @@ static grpc_call **perform_multirequest(servers_fixture *f,
   grpc_op *op;
   size_t i;
 
-  calls = gpr_malloc(sizeof(grpc_call *) * concurrent_calls);
+  calls = static_cast<grpc_call **>(
+      gpr_malloc(sizeof(grpc_call *) * concurrent_calls));
   for (i = 0; i < f->num_servers; i++) {
     kill_server(f, i);
   }
@@ -465,8 +474,8 @@ void run_spec(const test_spec *spec) {
   servers_fixture *f;
   grpc_channel_args args;
   grpc_arg arg_array[2];
-  rdata.call_details =
-      gpr_malloc(sizeof(grpc_call_details) * spec->num_servers);
+  rdata.call_details = static_cast<grpc_call_details *>(
+      gpr_malloc(sizeof(grpc_call_details) * spec->num_servers));
   f = setup_servers("127.0.0.1", &rdata, spec->num_servers);
 
   /* Create client. */
@@ -475,11 +484,12 @@ void run_spec(const test_spec *spec) {
   gpr_asprintf(&client_hostport, "ipv4:%s", servers_hostports_str);
 
   arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+  arg_array[0].key =
+      const_cast<char *>("grpc.testing.fixed_reconnect_backoff_ms");
   arg_array[0].value.integer = RETRY_TIMEOUT;
   arg_array[1].type = GRPC_ARG_STRING;
-  arg_array[1].key = GRPC_ARG_LB_POLICY_NAME;
-  arg_array[1].value.string = "round_robin";
+  arg_array[1].key = const_cast<char *>(GRPC_ARG_LB_POLICY_NAME);
+  arg_array[1].value.string = const_cast<char *>("round_robin");
   args.num_args = 2;
   args.args = arg_array;
 
@@ -513,13 +523,15 @@ static grpc_channel *create_client(const servers_fixture *f) {
   gpr_asprintf(&client_hostport, "ipv4:%s", servers_hostports_str);
 
   arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+  arg_array[0].key =
+      const_cast<char *>("grpc.testing.fixed_reconnect_backoff_ms");
   arg_array[0].value.integer = RETRY_TIMEOUT;
   arg_array[1].type = GRPC_ARG_STRING;
-  arg_array[1].key = GRPC_ARG_LB_POLICY_NAME;
-  arg_array[1].value.string = "ROUND_ROBIN";
+  arg_array[1].key = const_cast<char *>(GRPC_ARG_LB_POLICY_NAME);
+  arg_array[1].value.string = const_cast<char *>("ROUND_ROBIN");
   arg_array[2].type = GRPC_ARG_INTEGER;
-  arg_array[2].key = GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS;
+  arg_array[2].key =
+      const_cast<char *>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
   arg_array[2].value.integer = 0;
   args.num_args = GPR_ARRAY_SIZE(arg_array);
   args.args = arg_array;
@@ -540,7 +552,8 @@ static void test_ping() {
   const size_t num_servers = 1;
   int i;
 
-  rdata.call_details = gpr_malloc(sizeof(grpc_call_details) * num_servers);
+  rdata.call_details = static_cast<grpc_call_details *>(
+      gpr_malloc(sizeof(grpc_call_details) * num_servers));
   f = setup_servers("127.0.0.1", &rdata, num_servers);
   cqv = cq_verifier_create(f->cq);
 
@@ -585,8 +598,8 @@ static void test_pending_calls(size_t concurrent_calls) {
   request_data rdata;
   servers_fixture *f;
   test_spec *spec = test_spec_create(0, 4);
-  rdata.call_details =
-      gpr_malloc(sizeof(grpc_call_details) * spec->num_servers);
+  rdata.call_details = static_cast<grpc_call_details *>(
+      gpr_malloc(sizeof(grpc_call_details) * spec->num_servers));
   f = setup_servers("127.0.0.1", &rdata, spec->num_servers);
 
   client = create_client(f);
@@ -626,7 +639,7 @@ static void test_get_channel_info() {
   gpr_free(lb_policy_name);
   // Request service config, which does not exist, so we'll get nothing back.
   memset(&channel_info, 0, sizeof(channel_info));
-  char *service_config_json = "dummy_string";
+  char *service_config_json = const_cast<char *>("dummy_string");
   channel_info.service_config_json = &service_config_json;
   grpc_channel_get_info(channel, &channel_info);
   GPR_ASSERT(service_config_json == NULL);
@@ -634,8 +647,9 @@ static void test_get_channel_info() {
   grpc_channel_destroy(channel);
   grpc_arg arg;
   arg.type = GRPC_ARG_STRING;
-  arg.key = GRPC_ARG_SERVICE_CONFIG;
-  arg.value.string = "{\"loadBalancingPolicy\": \"ROUND_ROBIN\"}";
+  arg.key = const_cast<char *>(GRPC_ARG_SERVICE_CONFIG);
+  arg.value.string =
+      const_cast<char *>("{\"loadBalancingPolicy\": \"ROUND_ROBIN\"}");
   grpc_channel_args *args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
   channel = grpc_insecure_channel_create("ipv4:127.0.0.1:1234", args, NULL);
   {
@@ -676,7 +690,7 @@ static void verify_vanilla_round_robin(const servers_fixture *f,
   /* verify conn. seq. expectation */
   /* get the first sequence of "num_servers" elements */
   int *expected_connection_sequence =
-      gpr_malloc(sizeof(int) * expected_seq_length);
+      static_cast<int *>(gpr_malloc(sizeof(int) * expected_seq_length));
   memcpy(expected_connection_sequence, sequences->connections,
          sizeof(int) * expected_seq_length);
 
@@ -695,7 +709,8 @@ static void verify_vanilla_round_robin(const servers_fixture *f,
   /* All servers are available, therefore all client subchannels are READY, even
    * when we only need one for the client channel state to be READY */
   for (size_t i = 0; i < sequences->n; i++) {
-    const grpc_connectivity_state actual = sequences->connectivity_states[i];
+    const grpc_connectivity_state actual =
+        static_cast<grpc_connectivity_state>(sequences->connectivity_states[i]);
     const grpc_connectivity_state expected = GRPC_CHANNEL_READY;
     if (actual != expected) {
       gpr_log(GPR_ERROR,
@@ -721,7 +736,8 @@ static void verify_vanishing_floor_round_robin(
 
   /* verify conn. seq. expectation */
   /* copy the first full sequence (without -1s) */
-  expected_connection_sequence = gpr_malloc(sizeof(int) * expected_seq_length);
+  expected_connection_sequence =
+      static_cast<int *>(gpr_malloc(sizeof(int) * expected_seq_length));
   memcpy(expected_connection_sequence, sequences->connections + 2,
          expected_seq_length * sizeof(int));
 
@@ -750,7 +766,8 @@ static void verify_vanishing_floor_round_robin(
   /* There's always at least one subchannel READY (connected), therefore the
    * overall state of the client channel is READY at all times. */
   for (i = 0; i < sequences->n; i++) {
-    const grpc_connectivity_state actual = sequences->connectivity_states[i];
+    const grpc_connectivity_state actual =
+        static_cast<grpc_connectivity_state>(sequences->connectivity_states[i]);
     const grpc_connectivity_state expected = GRPC_CHANNEL_READY;
     if (actual != expected) {
       gpr_log(GPR_ERROR,
@@ -785,7 +802,8 @@ static void verify_total_carnage_round_robin(const servers_fixture *f,
    * Note that all other states (IDLE, CONNECTING, TRANSIENT_FAILURE) are still
    * possible, as the policy transitions while attempting to reconnect. */
   for (size_t i = 0; i < sequences->n; i++) {
-    const grpc_connectivity_state actual = sequences->connectivity_states[i];
+    const grpc_connectivity_state actual =
+        static_cast<grpc_connectivity_state>(sequences->connectivity_states[i]);
     if (actual == GRPC_CHANNEL_READY || actual == GRPC_CHANNEL_SHUTDOWN) {
       gpr_log(GPR_ERROR,
               "CONNECTIVITY STATUS SEQUENCE FAILURE: got unexpected state "
@@ -805,7 +823,8 @@ static void verify_partial_carnage_round_robin(
 
   /* verify conn. seq. expectation */
   /* get the first sequence of "num_servers" elements */
-  expected_connection_sequence = gpr_malloc(sizeof(int) * expected_seq_length);
+  expected_connection_sequence =
+      static_cast<int *>(gpr_malloc(sizeof(int) * expected_seq_length));
   memcpy(expected_connection_sequence, sequences->connections,
          sizeof(int) * expected_seq_length);
 
@@ -827,7 +846,8 @@ static void verify_partial_carnage_round_robin(
 
   /* We can assert that the first client channel state should be READY, when all
    * servers were available */
-  grpc_connectivity_state actual = sequences->connectivity_states[0];
+  grpc_connectivity_state actual =
+      static_cast<grpc_connectivity_state>(sequences->connectivity_states[0]);
   grpc_connectivity_state expected = GRPC_CHANNEL_READY;
   if (actual != expected) {
     gpr_log(GPR_ERROR,
@@ -841,7 +861,8 @@ static void verify_partial_carnage_round_robin(
   /* ... and that the last one shouldn't be READY (or SHUTDOWN): all servers are
    * gone. It may be all other states (IDLE, CONNECTING, TRANSIENT_FAILURE), as
    * the policy transitions while attempting to reconnect. */
-  actual = sequences->connectivity_states[num_iters - 1];
+  actual = static_cast<grpc_connectivity_state>(
+      sequences->connectivity_states[num_iters - 1]);
   for (i = 0; i < sequences->n; i++) {
     if (actual == GRPC_CHANNEL_READY || actual == GRPC_CHANNEL_SHUTDOWN) {
       gpr_log(GPR_ERROR,
@@ -894,7 +915,8 @@ static void verify_rebirth_round_robin(const servers_fixture *f,
   /* We can assert that the first client channel state should be READY, when all
    * servers were available; same thing for the last one. In the middle
    * somewhere there must exist at least one TRANSIENT_FAILURE */
-  grpc_connectivity_state actual = sequences->connectivity_states[0];
+  grpc_connectivity_state actual =
+      static_cast<grpc_connectivity_state>(sequences->connectivity_states[0]);
   grpc_connectivity_state expected = GRPC_CHANNEL_READY;
   if (actual != expected) {
     gpr_log(GPR_ERROR,
@@ -905,7 +927,8 @@ static void verify_rebirth_round_robin(const servers_fixture *f,
     abort();
   }
 
-  actual = sequences->connectivity_states[num_iters - 1];
+  actual = static_cast<grpc_connectivity_state>(
+      sequences->connectivity_states[num_iters - 1]);
   expected = GRPC_CHANNEL_READY;
   if (actual != expected) {
     gpr_log(GPR_ERROR,
@@ -931,7 +954,8 @@ static void verify_rebirth_round_robin(const servers_fixture *f,
         "instead:");
     for (size_t i = 0; i < num_iters; i++) {
       gpr_log(GPR_ERROR, "[%d]: %s", (int)i,
-              grpc_connectivity_state_name(sequences->connectivity_states[i]));
+              grpc_connectivity_state_name(static_cast<grpc_connectivity_state>(
+                  sequences->connectivity_states[i])));
     }
   }
 }
diff --git a/test/core/client_channel/parse_address_test.c b/test/core/client_channel/parse_address_test.cc
index d011176869..d011176869 100644
--- a/test/core/client_channel/parse_address_test.c
+++ b/test/core/client_channel/parse_address_test.cc
diff --git a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
index 4597285063..4dfee8cf90 100644
--- a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.c
+++ b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
@@ -49,9 +49,11 @@ static void my_resolve_address(grpc_exec_ctx *exec_ctx, const char *addr,
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Failure");
   } else {
     gpr_mu_unlock(&g_mu);
-    *addrs = gpr_malloc(sizeof(**addrs));
+    *addrs =
+        static_cast<grpc_resolved_addresses *>(gpr_malloc(sizeof(**addrs)));
     (*addrs)->naddrs = 1;
-    (*addrs)->addrs = gpr_malloc(sizeof(*(*addrs)->addrs));
+    (*addrs)->addrs = static_cast<grpc_resolved_address *>(
+        gpr_malloc(sizeof(*(*addrs)->addrs)));
     (*addrs)->addrs[0].len = 123;
   }
   GRPC_CLOSURE_SCHED(exec_ctx, on_done, error);
@@ -95,7 +97,7 @@ static grpc_resolver *create_resolver(grpc_exec_ctx *exec_ctx,
 }
 
 static void on_done(grpc_exec_ctx *exec_ctx, void *ev, grpc_error *error) {
-  gpr_event_set(ev, (void *)1);
+  gpr_event_set((gpr_event *)ev, (void *)1);
 }
 
 // interleave waiting for an event with a timer check
@@ -121,7 +123,7 @@ typedef struct next_args {
 static void call_resolver_next_now_lock_taken(grpc_exec_ctx *exec_ctx,
                                               void *arg,
                                               grpc_error *error_unused) {
-  next_args *a = arg;
+  next_args *a = static_cast<next_args *>(arg);
   grpc_resolver_next_locked(exec_ctx, a->resolver, a->result, a->on_complete);
   gpr_free(a);
 }
@@ -130,7 +132,7 @@ static void call_resolver_next_after_locking(grpc_exec_ctx *exec_ctx,
                                              grpc_resolver *resolver,
                                              grpc_channel_args **result,
                                              grpc_closure *on_complete) {
-  next_args *a = gpr_malloc(sizeof(*a));
+  next_args *a = static_cast<next_args *>(gpr_malloc(sizeof(*a)));
   a->resolver = resolver;
   a->result = result;
   a->on_complete = on_complete;
diff --git a/test/core/client_channel/resolvers/dns_resolver_test.c b/test/core/client_channel/resolvers/dns_resolver_test.cc
index a14926f173..a14926f173 100644
--- a/test/core/client_channel/resolvers/dns_resolver_test.c
+++ b/test/core/client_channel/resolvers/dns_resolver_test.cc
diff --git a/test/core/client_channel/resolvers/fake_resolver_test.c b/test/core/client_channel/resolvers/fake_resolver_test.cc
index 9b0854d6d8..ed14151ae3 100644
--- a/test/core/client_channel/resolvers/fake_resolver_test.c
+++ b/test/core/client_channel/resolvers/fake_resolver_test.cc
@@ -56,7 +56,7 @@ typedef struct on_resolution_arg {
 } on_resolution_arg;
 
 void on_resolution_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  on_resolution_arg *res = arg;
+  on_resolution_arg *res = static_cast<on_resolution_arg *>(arg);
   // We only check the addresses channel arg because that's the only one
   // explicitly set by the test via
   // grpc_fake_resolver_response_generator_set_response.
@@ -84,7 +84,7 @@ static void test_fake_resolver() {
   // Setup expectations.
   grpc_uri *uris[] = {grpc_uri_parse(&exec_ctx, "ipv4:10.2.1.1:1234", true),
                       grpc_uri_parse(&exec_ctx, "ipv4:127.0.0.1:4321", true)};
-  char *balancer_names[] = {"name1", "name2"};
+  const char *balancer_names[] = {"name1", "name2"};
   const bool is_balancer[] = {true, false};
   grpc_lb_addresses *addresses = grpc_lb_addresses_create(3, NULL);
   for (size_t i = 0; i < GPR_ARRAY_SIZE(uris); ++i) {
@@ -117,7 +117,7 @@ static void test_fake_resolver() {
   // Setup update.
   grpc_uri *uris_update[] = {
       grpc_uri_parse(&exec_ctx, "ipv4:192.168.1.0:31416", true)};
-  char *balancer_names_update[] = {"name3"};
+  const char *balancer_names_update[] = {"name3"};
   const bool is_balancer_update[] = {false};
   grpc_lb_addresses *addresses_update = grpc_lb_addresses_create(1, NULL);
   for (size_t i = 0; i < GPR_ARRAY_SIZE(uris_update); ++i) {
diff --git a/test/core/client_channel/resolvers/sockaddr_resolver_test.c b/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
index 8b88619164..254ce59bc2 100644
--- a/test/core/client_channel/resolvers/sockaddr_resolver_test.c
+++ b/test/core/client_channel/resolvers/sockaddr_resolver_test.cc
@@ -36,7 +36,7 @@ typedef struct on_resolution_arg {
 } on_resolution_arg;
 
 void on_resolution_cb(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  on_resolution_arg *res = arg;
+  on_resolution_arg *res = static_cast<on_resolution_arg *>(arg);
   grpc_channel_args_destroy(exec_ctx, res->resolver_result);
 }
 
diff --git a/test/core/client_channel/uri_fuzzer_test.c b/test/core/client_channel/uri_fuzzer_test.cc
index e51d0031ec..8c071454bc 100644
--- a/test/core/client_channel/uri_fuzzer_test.c
+++ b/test/core/client_channel/uri_fuzzer_test.cc
@@ -29,7 +29,7 @@ bool squelch = true;
 bool leak_check = true;
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  char *s = gpr_malloc(size + 1);
+  char *s = static_cast<char *>(gpr_malloc(size + 1));
   memcpy(s, data, size);
   s[size] = 0;
 
diff --git a/test/core/client_channel/uri_parser_test.c b/test/core/client_channel/uri_parser_test.cc
index f53cae196b..f53cae196b 100644
--- a/test/core/client_channel/uri_parser_test.c
+++ b/test/core/client_channel/uri_parser_test.cc
diff --git a/test/core/compression/algorithm_test.c b/test/core/compression/algorithm_test.cc
index a11e6e90ac..4ca979e30f 100644
--- a/test/core/compression/algorithm_test.c
+++ b/test/core/compression/algorithm_test.cc
@@ -69,8 +69,10 @@ static void test_algorithm_failure(void) {
 
   GPR_ASSERT(grpc_compression_algorithm_name(GRPC_COMPRESS_ALGORITHMS_COUNT,
                                              NULL) == 0);
-  GPR_ASSERT(grpc_compression_algorithm_name(GRPC_COMPRESS_ALGORITHMS_COUNT + 1,
-                                             NULL) == 0);
+  GPR_ASSERT(
+      grpc_compression_algorithm_name(static_cast<grpc_compression_algorithm>(
+                                          GRPC_COMPRESS_ALGORITHMS_COUNT + 1),
+                                      NULL) == 0);
   mdstr = grpc_slice_from_static_string("this-is-an-invalid-algorithm");
   GPR_ASSERT(grpc_compression_algorithm_from_slice(mdstr) ==
              GRPC_COMPRESS_ALGORITHMS_COUNT);
@@ -78,7 +80,8 @@ static void test_algorithm_failure(void) {
       grpc_compression_algorithm_slice(GRPC_COMPRESS_ALGORITHMS_COUNT),
       grpc_empty_slice()));
   GPR_ASSERT(grpc_slice_eq(
-      grpc_compression_algorithm_slice(GRPC_COMPRESS_ALGORITHMS_COUNT + 1),
+      grpc_compression_algorithm_slice(static_cast<grpc_compression_algorithm>(
+          static_cast<int>(GRPC_COMPRESS_ALGORITHMS_COUNT) + 1)),
       grpc_empty_slice()));
   grpc_slice_unref_internal(&exec_ctx, mdstr);
   grpc_exec_ctx_finish(&exec_ctx);
diff --git a/test/core/compression/compression_test.c b/test/core/compression/compression_test.cc
index 326a800300..f4fa3a8d63 100644
--- a/test/core/compression/compression_test.c
+++ b/test/core/compression/compression_test.cc
@@ -181,21 +181,27 @@ static void test_compression_enable_disable_algorithm(void) {
 
   grpc_compression_options_init(&options);
   for (algorithm = GRPC_COMPRESS_NONE;
-       algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT; algorithm++) {
+       algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT;
+       algorithm = static_cast<grpc_compression_algorithm>(
+           static_cast<int>(algorithm) + 1)) {
     /* all algorithms are enabled by default */
     GPR_ASSERT(grpc_compression_options_is_algorithm_enabled(&options,
                                                              algorithm) != 0);
   }
   /* disable one by one */
   for (algorithm = GRPC_COMPRESS_NONE;
-       algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT; algorithm++) {
+       algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT;
+       algorithm = static_cast<grpc_compression_algorithm>(
+           static_cast<int>(algorithm) + 1)) {
     grpc_compression_options_disable_algorithm(&options, algorithm);
     GPR_ASSERT(grpc_compression_options_is_algorithm_enabled(&options,
                                                              algorithm) == 0);
   }
   /* re-enable one by one */
   for (algorithm = GRPC_COMPRESS_NONE;
-       algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT; algorithm++) {
+       algorithm < GRPC_COMPRESS_ALGORITHMS_COUNT;
+       algorithm = static_cast<grpc_compression_algorithm>(
+           static_cast<int>(algorithm) + 1)) {
     grpc_compression_options_enable_algorithm(&options, algorithm);
     GPR_ASSERT(grpc_compression_options_is_algorithm_enabled(&options,
                                                              algorithm) != 0);
diff --git a/test/core/compression/message_compress_test.c b/test/core/compression/message_compress_test.cc
index f7f4893dee..1395d42739 100644
--- a/test/core/compression/message_compress_test.c
+++ b/test/core/compression/message_compress_test.cc
@@ -148,16 +148,17 @@ static grpc_slice create_test_value(test_value id) {
 static void test_tiny_data_compress(void) {
   grpc_slice_buffer input;
   grpc_slice_buffer output;
-  grpc_compression_algorithm i;
 
   grpc_slice_buffer_init(&input);
   grpc_slice_buffer_init(&output);
   grpc_slice_buffer_add(&input, create_test_value(ONE_A));
 
-  for (i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
+  for (int i = 0; i < GRPC_COMPRESS_ALGORITHMS_COUNT; i++) {
     if (i == GRPC_COMPRESS_NONE) continue;
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-    GPR_ASSERT(0 == grpc_msg_compress(&exec_ctx, i, &input, &output));
+    GPR_ASSERT(0 == grpc_msg_compress(
+                        &exec_ctx, static_cast<grpc_compression_algorithm>(i),
+                        &input, &output));
     grpc_exec_ctx_finish(&exec_ctx);
     GPR_ASSERT(1 == output.count);
   }
@@ -252,8 +253,10 @@ static void test_bad_compression_algorithm(void) {
                                      &input, &output);
   GPR_ASSERT(0 == was_compressed);
 
-  was_compressed = grpc_msg_compress(
-      &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT + 123, &input, &output);
+  was_compressed =
+      grpc_msg_compress(&exec_ctx, static_cast<grpc_compression_algorithm>(
+                                       GRPC_COMPRESS_ALGORITHMS_COUNT + 123),
+                        &input, &output);
   GPR_ASSERT(0 == was_compressed);
   grpc_exec_ctx_finish(&exec_ctx);
 
@@ -276,8 +279,10 @@ static void test_bad_decompression_algorithm(void) {
       &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT, &input, &output);
   GPR_ASSERT(0 == was_decompressed);
 
-  was_decompressed = grpc_msg_decompress(
-      &exec_ctx, GRPC_COMPRESS_ALGORITHMS_COUNT + 123, &input, &output);
+  was_decompressed =
+      grpc_msg_decompress(&exec_ctx, static_cast<grpc_compression_algorithm>(
+                                         GRPC_COMPRESS_ALGORITHMS_COUNT + 123),
+                          &input, &output);
   GPR_ASSERT(0 == was_decompressed);
   grpc_exec_ctx_finish(&exec_ctx);
 
@@ -300,8 +305,13 @@ int main(int argc, char **argv) {
     for (j = 0; j < GPR_ARRAY_SIZE(uncompressed_split_modes); j++) {
       for (k = 0; k < GPR_ARRAY_SIZE(compressed_split_modes); k++) {
         for (m = 0; m < TEST_VALUE_COUNT; m++) {
-          grpc_slice slice = create_test_value(m);
-          assert_passthrough(slice, i, j, k, get_compressability(m, i));
+          grpc_slice slice = create_test_value(static_cast<test_value>(m));
+          assert_passthrough(
+              slice, static_cast<grpc_compression_algorithm>(i),
+              static_cast<grpc_slice_split_mode>(j),
+              static_cast<grpc_slice_split_mode>(k),
+              get_compressability(static_cast<test_value>(m),
+                                  static_cast<grpc_compression_algorithm>(i)));
           grpc_slice_unref(slice);
         }
       }
diff --git a/test/core/compression/stream_compression_test.c b/test/core/compression/stream_compression_test.cc
index afed6cd6b5..d136408710 100644
--- a/test/core/compression/stream_compression_test.c
+++ b/test/core/compression/stream_compression_test.cc
@@ -134,7 +134,8 @@ test_stream_compression_simple_compress_decompress_with_output_size_constraint()
 #define LARGE_DATA_SIZE (1024 * 1024)
 static void
 test_stream_compression_simple_compress_decompress_with_large_data() {
-  char *test_str = gpr_malloc(LARGE_DATA_SIZE * sizeof(char));
+  char *test_str =
+      static_cast<char *>(gpr_malloc(LARGE_DATA_SIZE * sizeof(char)));
   generate_random_payload(test_str, LARGE_DATA_SIZE);
   grpc_slice_buffer source, relay, sink;
   grpc_slice_buffer_init(&source);
diff --git a/test/core/end2end/BUILD b/test/core/end2end/BUILD
index 49bfc43646..1589880e1f 100644
--- a/test/core/end2end/BUILD
+++ b/test/core/end2end/BUILD
@@ -22,7 +22,7 @@ load(":generate_tests.bzl", "grpc_end2end_tests")
 
 grpc_cc_library(
     name = "cq_verifier",
-    srcs = ["cq_verifier.c"],
+    srcs = ["cq_verifier.cc"],
     hdrs = ["cq_verifier.h"],
     language = "C",
     visibility = ["//test:__subpackages__"],
@@ -36,9 +36,9 @@ grpc_cc_library(
 grpc_cc_library(
     name = "ssl_test_data",
     srcs = [
-        "data/client_certs.c",
-        "data/server1_cert.c",
-        "data/server1_key.c",
+        "data/client_certs.cc",
+        "data/server1_cert.cc",
+        "data/server1_key.cc",
         "data/test_root_cert.c",
     ],
     hdrs = ["data/ssl_test_data.h"],
@@ -49,7 +49,7 @@ grpc_cc_library(
 
 grpc_cc_library(
     name = "http_proxy",
-    srcs = ["fixtures/http_proxy_fixture.c"],
+    srcs = ["fixtures/http_proxy_fixture.cc"],
     hdrs = ["fixtures/http_proxy_fixture.h"],
     language = "C",
     deps = [
@@ -61,7 +61,7 @@ grpc_cc_library(
 
 grpc_cc_library(
     name = "proxy",
-    srcs = ["fixtures/proxy.c"],
+    srcs = ["fixtures/proxy.cc"],
     hdrs = ["fixtures/proxy.h"],
     language = "C",
     deps = [
diff --git a/test/core/end2end/bad_server_response_test.c b/test/core/end2end/bad_server_response_test.cc
index 2070fa5b02..2070fa5b02 100644
--- a/test/core/end2end/bad_server_response_test.c
+++ b/test/core/end2end/bad_server_response_test.cc
diff --git a/test/core/end2end/connection_refused_test.c b/test/core/end2end/connection_refused_test.cc
index 40227dece4..b295682ce8 100644
--- a/test/core/end2end/connection_refused_test.c
+++ b/test/core/end2end/connection_refused_test.cc
@@ -62,8 +62,8 @@ static void run_test(bool wait_for_ready, bool use_service_config) {
     GPR_ASSERT(wait_for_ready);
     grpc_arg arg;
     arg.type = GRPC_ARG_STRING;
-    arg.key = GRPC_ARG_SERVICE_CONFIG;
-    arg.value.string =
+    arg.key = const_cast<char *>(GRPC_ARG_SERVICE_CONFIG);
+    arg.value.string = const_cast<char *>(
         "{\n"
         "  \"methodConfig\": [ {\n"
         "    \"name\": [\n"
@@ -71,7 +71,7 @@ static void run_test(bool wait_for_ready, bool use_service_config) {
         "    ],\n"
         "    \"waitForReady\": true\n"
         "  } ]\n"
-        "}";
+        "}");
     args = grpc_channel_args_copy_and_add(args, &arg, 1);
   }
 
diff --git a/test/core/end2end/cq_verifier.c b/test/core/end2end/cq_verifier.cc
index bb978923b2..bb978923b2 100644
--- a/test/core/end2end/cq_verifier.c
+++ b/test/core/end2end/cq_verifier.cc
diff --git a/test/core/end2end/cq_verifier_native.c b/test/core/end2end/cq_verifier_native.cc
index f19b15c465..f19b15c465 100644
--- a/test/core/end2end/cq_verifier_native.c
+++ b/test/core/end2end/cq_verifier_native.cc
diff --git a/test/core/end2end/cq_verifier_uv.c b/test/core/end2end/cq_verifier_uv.cc
index fc873b784f..fc873b784f 100644
--- a/test/core/end2end/cq_verifier_uv.c
+++ b/test/core/end2end/cq_verifier_uv.cc
diff --git a/test/core/end2end/data/client_certs.c b/test/core/end2end/data/client_certs.cc
index 78770674c4..6e61501234 100644
--- a/test/core/end2end/data/client_certs.c
+++ b/test/core/end2end/data/client_certs.cc
@@ -16,6 +16,8 @@
  *
  */
 
+#include "test/core/end2end/data/ssl_test_data.h"
+
 const char test_self_signed_client_cert[] = {
     0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x42, 0x45, 0x47, 0x49, 0x4e, 0x20, 0x43,
     0x45, 0x52, 0x54, 0x49, 0x46, 0x49, 0x43, 0x41, 0x54, 0x45, 0x2d, 0x2d,
diff --git a/test/core/end2end/data/server1_cert.c b/test/core/end2end/data/server1_cert.cc
index 8d149607b6..5e017c4da7 100644
--- a/test/core/end2end/data/server1_cert.c
+++ b/test/core/end2end/data/server1_cert.cc
@@ -16,6 +16,8 @@
  *
  */
 
+#include "test/core/end2end/data/ssl_test_data.h"
+
 const char test_server1_cert[] = {
     0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x42, 0x45, 0x47, 0x49, 0x4e, 0x20, 0x43,
     0x45, 0x52, 0x54, 0x49, 0x46, 0x49, 0x43, 0x41, 0x54, 0x45, 0x2d, 0x2d,
diff --git a/test/core/end2end/data/server1_key.c b/test/core/end2end/data/server1_key.cc
index eee5cc6d82..92a77aa21f 100644
--- a/test/core/end2end/data/server1_key.c
+++ b/test/core/end2end/data/server1_key.cc
@@ -16,6 +16,8 @@
  *
  */
 
+#include "test/core/end2end/data/ssl_test_data.h"
+
 const char test_server1_key[] = {
     0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x42, 0x45, 0x47, 0x49, 0x4e, 0x20, 0x52,
     0x53, 0x41, 0x20, 0x50, 0x52, 0x49, 0x56, 0x41, 0x54, 0x45, 0x20, 0x4b,
diff --git a/test/core/end2end/data/ssl_test_data.h b/test/core/end2end/data/ssl_test_data.h
index e9c7dbceb2..303f3a6eda 100644
--- a/test/core/end2end/data/ssl_test_data.h
+++ b/test/core/end2end/data/ssl_test_data.h
@@ -19,10 +19,6 @@
 #ifndef GRPC_TEST_CORE_END2END_DATA_SSL_TEST_DATA_H
 #define GRPC_TEST_CORE_END2END_DATA_SSL_TEST_DATA_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 extern const char test_root_cert[];
 extern const char test_server1_cert[];
 extern const char test_server1_key[];
@@ -31,8 +27,4 @@ extern const char test_self_signed_client_key[];
 extern const char test_signed_client_cert[];
 extern const char test_signed_client_key[];
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* GRPC_TEST_CORE_END2END_DATA_SSL_TEST_DATA_H */
diff --git a/test/core/end2end/data/test_root_cert.c b/test/core/end2end/data/test_root_cert.cc
index ef39ca56ab..81ca410e14 100644
--- a/test/core/end2end/data/test_root_cert.c
+++ b/test/core/end2end/data/test_root_cert.cc
@@ -16,6 +16,8 @@
  *
  */
 
+#include "test/core/end2end/data/ssl_test_data.h"
+
 const char test_root_cert[] = {
     0x2d, 0x2d, 0x2d, 0x2d, 0x2d, 0x42, 0x45, 0x47, 0x49, 0x4e, 0x20, 0x43,
     0x45, 0x52, 0x54, 0x49, 0x46, 0x49, 0x43, 0x41, 0x54, 0x45, 0x2d, 0x2d,
diff --git a/test/core/end2end/dualstack_socket_test.c b/test/core/end2end/dualstack_socket_test.cc
index f9150f145a..bfb2e227ac 100644
--- a/test/core/end2end/dualstack_socket_test.c
+++ b/test/core/end2end/dualstack_socket_test.cc
@@ -118,7 +118,8 @@ void test_connect(const char *server_host, const char *client_host, int port,
         grpc_slice_new((char *)client_host, strlen(client_host), do_nothing);
     grpc_slice_buffer_init(&uri_parts);
     grpc_slice_split(uri_slice, ",", &uri_parts);
-    hosts_with_port = gpr_malloc(sizeof(char *) * uri_parts.count);
+    hosts_with_port =
+        static_cast<char **>(gpr_malloc(sizeof(char *) * uri_parts.count));
     for (i = 0; i < uri_parts.count; i++) {
       char *uri_part_str = grpc_slice_to_c_string(uri_parts.slices[i]);
       gpr_asprintf(&hosts_with_port[i], "%s:%d", uri_part_str, port);
diff --git a/test/core/end2end/end2end_nosec_tests.c b/test/core/end2end/end2end_nosec_tests.cc
index 3236feea56..3236feea56 100644
--- a/test/core/end2end/end2end_nosec_tests.c
+++ b/test/core/end2end/end2end_nosec_tests.cc
diff --git a/test/core/end2end/end2end_test_utils.c b/test/core/end2end/end2end_test_utils.cc
index c1f119548a..c1f119548a 100644
--- a/test/core/end2end/end2end_test_utils.c
+++ b/test/core/end2end/end2end_test_utils.cc
diff --git a/test/core/end2end/end2end_tests.c b/test/core/end2end/end2end_tests.cc
index ca9443b642..ca9443b642 100644
--- a/test/core/end2end/end2end_tests.c
+++ b/test/core/end2end/end2end_tests.cc
diff --git a/test/core/end2end/fixtures/h2_census.c b/test/core/end2end/fixtures/h2_census.cc
index 9870ccb34a..d7058187b4 100644
--- a/test/core/end2end/fixtures/h2_census.c
+++ b/test/core/end2end/fixtures/h2_census.cc
@@ -44,7 +44,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -59,14 +60,15 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 static grpc_arg make_census_enable_arg(void) {
   grpc_arg arg;
   arg.type = GRPC_ARG_INTEGER;
-  arg.key = GRPC_ARG_ENABLE_CENSUS;
+  arg.key = const_cast<char *>(GRPC_ARG_ENABLE_CENSUS);
   arg.value.integer = 1;
   return arg;
 }
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   grpc_arg arg = make_census_enable_arg();
   client_args = grpc_channel_args_copy_and_add(client_args, &arg, 1);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
@@ -80,7 +82,8 @@ void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   grpc_arg arg = make_census_enable_arg();
   if (f->server) {
     grpc_server_destroy(f->server);
@@ -98,7 +101,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_compress.c b/test/core/end2end/fixtures/h2_compress.cc
index 9866dea7eb..bdfeef259d 100644
--- a/test/core/end2end/fixtures/h2_compress.c
+++ b/test/core/end2end/fixtures/h2_compress.cc
@@ -47,7 +47,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack_compression(
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
   fullstack_compression_fixture_data *ffd =
-      gpr_malloc(sizeof(fullstack_compression_fixture_data));
+      static_cast<fullstack_compression_fixture_data *>(
+          gpr_malloc(sizeof(fullstack_compression_fixture_data)));
   memset(ffd, 0, sizeof(fullstack_compression_fixture_data));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -62,7 +63,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack_compression(
 
 void chttp2_init_client_fullstack_compression(grpc_end2end_test_fixture *f,
                                               grpc_channel_args *client_args) {
-  fullstack_compression_fixture_data *ffd = f->fixture_data;
+  fullstack_compression_fixture_data *ffd =
+      static_cast<fullstack_compression_fixture_data *>(f->fixture_data);
   if (ffd->client_args_compression != NULL) {
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
@@ -76,7 +78,8 @@ void chttp2_init_client_fullstack_compression(grpc_end2end_test_fixture *f,
 
 void chttp2_init_server_fullstack_compression(grpc_end2end_test_fixture *f,
                                               grpc_channel_args *server_args) {
-  fullstack_compression_fixture_data *ffd = f->fixture_data;
+  fullstack_compression_fixture_data *ffd =
+      static_cast<fullstack_compression_fixture_data *>(f->fixture_data);
   if (ffd->server_args_compression != NULL) {
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
@@ -95,7 +98,8 @@ void chttp2_init_server_fullstack_compression(grpc_end2end_test_fixture *f,
 
 void chttp2_tear_down_fullstack_compression(grpc_end2end_test_fixture *f) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  fullstack_compression_fixture_data *ffd = f->fixture_data;
+  fullstack_compression_fixture_data *ffd =
+      static_cast<fullstack_compression_fixture_data *>(f->fixture_data);
   grpc_channel_args_destroy(&exec_ctx, ffd->client_args_compression);
   grpc_channel_args_destroy(&exec_ctx, ffd->server_args_compression);
   gpr_free(ffd->localaddr);
diff --git a/test/core/end2end/fixtures/h2_fakesec.c b/test/core/end2end/fixtures/h2_fakesec.cc
index e622d952be..7cbcfcca91 100644
--- a/test/core/end2end/fixtures/h2_fakesec.c
+++ b/test/core/end2end/fixtures/h2_fakesec.cc
@@ -39,7 +39,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
   fullstack_secure_fixture_data *ffd =
-      gpr_malloc(sizeof(fullstack_secure_fixture_data));
+      static_cast<fullstack_secure_fixture_data *>(
+          gpr_malloc(sizeof(fullstack_secure_fixture_data)));
 
   memset(&f, 0, sizeof(f));
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -62,7 +63,8 @@ static void process_auth_failure(void *state, grpc_auth_context *ctx,
 static void chttp2_init_client_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args,
     grpc_channel_credentials *creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   f->client =
       grpc_secure_channel_create(creds, ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client != NULL);
@@ -72,7 +74,8 @@ static void chttp2_init_client_secure_fullstack(
 static void chttp2_init_server_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args,
     grpc_server_credentials *server_creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -85,7 +88,8 @@ static void chttp2_init_server_secure_fullstack(
 }
 
 void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_fd.c b/test/core/end2end/fixtures/h2_fd.cc
index e82c120221..2dc7898d56 100644
--- a/test/core/end2end/fixtures/h2_fd.c
+++ b/test/core/end2end/fixtures/h2_fd.cc
@@ -50,7 +50,8 @@ static void create_sockets(int sv[2]) {
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
-  sp_fixture_data *fixture_data = gpr_malloc(sizeof(*fixture_data));
+  sp_fixture_data *fixture_data =
+      static_cast<sp_fixture_data *>(gpr_malloc(sizeof(*fixture_data)));
 
   grpc_end2end_test_fixture f;
   memset(&f, 0, sizeof(f));
@@ -66,7 +67,7 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *client_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  sp_fixture_data *sfd = f->fixture_data;
+  sp_fixture_data *sfd = static_cast<sp_fixture_data *>(f->fixture_data);
 
   GPR_ASSERT(!f->client);
   f->client = grpc_insecure_channel_create_from_fd(
@@ -79,7 +80,7 @@ static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *server_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  sp_fixture_data *sfd = f->fixture_data;
+  sp_fixture_data *sfd = static_cast<sp_fixture_data *>(f->fixture_data);
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, NULL);
   GPR_ASSERT(f->server);
diff --git a/test/core/end2end/fixtures/h2_full+pipe.c b/test/core/end2end/fixtures/h2_full+pipe.cc
index c764bd704a..beff1be239 100644
--- a/test/core/end2end/fixtures/h2_full+pipe.c
+++ b/test/core/end2end/fixtures/h2_full+pipe.cc
@@ -49,7 +49,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -63,14 +64,16 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client);
 }
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -81,7 +84,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_full+trace.c b/test/core/end2end/fixtures/h2_full+trace.cc
index 7eb29e0d32..efed0c536f 100644
--- a/test/core/end2end/fixtures/h2_full+trace.c
+++ b/test/core/end2end/fixtures/h2_full+trace.cc
@@ -49,7 +49,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -63,14 +64,16 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client);
 }
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -81,7 +84,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_full+workarounds.c b/test/core/end2end/fixtures/h2_full+workarounds.cc
index a98e5ad57f..d4930ce90d 100644
--- a/test/core/end2end/fixtures/h2_full+workarounds.c
+++ b/test/core/end2end/fixtures/h2_full+workarounds.cc
@@ -37,7 +37,7 @@
 #include "test/core/util/test_config.h"
 
 static char *workarounds_arg[GRPC_MAX_WORKAROUND_ID] = {
-    GRPC_ARG_WORKAROUND_CRONET_COMPRESSION};
+    const_cast<char *>(GRPC_ARG_WORKAROUND_CRONET_COMPRESSION)};
 
 typedef struct fullstack_fixture_data {
   char *localaddr;
@@ -47,7 +47,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -61,7 +62,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client);
 }
@@ -70,7 +72,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
   int i;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   grpc_arg args[GRPC_MAX_WORKAROUND_ID];
   for (i = 0; i < GRPC_MAX_WORKAROUND_ID; i++) {
     args[i].key = workarounds_arg[i];
@@ -91,7 +94,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_full.c b/test/core/end2end/fixtures/h2_full.cc
index ae68bd9698..d132198157 100644
--- a/test/core/end2end/fixtures/h2_full.c
+++ b/test/core/end2end/fixtures/h2_full.cc
@@ -43,7 +43,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -57,14 +58,16 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client);
 }
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -75,7 +78,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_http_proxy.c b/test/core/end2end/fixtures/h2_http_proxy.cc
index 6145892365..5630b491b0 100644
--- a/test/core/end2end/fixtures/h2_http_proxy.c
+++ b/test/core/end2end/fixtures/h2_http_proxy.cc
@@ -47,7 +47,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   memset(&f, 0, sizeof(f));
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   const int server_port = grpc_pick_unused_port_or_die();
   gpr_join_host_port(&ffd->server_addr, "localhost", server_port);
 
@@ -64,7 +65,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   char *proxy_uri;
 
   /* If testing for proxy auth, add credentials to proxy uri */
@@ -85,7 +87,8 @@ void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -96,7 +99,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   gpr_free(ffd->server_addr);
   grpc_end2end_http_proxy_destroy(ffd->proxy);
   gpr_free(ffd);
diff --git a/test/core/end2end/fixtures/h2_load_reporting.c b/test/core/end2end/fixtures/h2_load_reporting.cc
index 8a05bb722a..e461f13e06 100644
--- a/test/core/end2end/fixtures/h2_load_reporting.c
+++ b/test/core/end2end/fixtures/h2_load_reporting.cc
@@ -45,8 +45,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_load_reporting(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
-  load_reporting_fixture_data *ffd =
-      gpr_malloc(sizeof(load_reporting_fixture_data));
+  load_reporting_fixture_data *ffd = static_cast<load_reporting_fixture_data *>(
+      gpr_malloc(sizeof(load_reporting_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -60,14 +60,16 @@ static grpc_end2end_test_fixture chttp2_create_fixture_load_reporting(
 
 void chttp2_init_client_load_reporting(grpc_end2end_test_fixture *f,
                                        grpc_channel_args *client_args) {
-  load_reporting_fixture_data *ffd = f->fixture_data;
+  load_reporting_fixture_data *ffd =
+      static_cast<load_reporting_fixture_data *>(f->fixture_data);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client);
 }
 
 void chttp2_init_server_load_reporting(grpc_end2end_test_fixture *f,
                                        grpc_channel_args *server_args) {
-  load_reporting_fixture_data *ffd = f->fixture_data;
+  load_reporting_fixture_data *ffd =
+      static_cast<load_reporting_fixture_data *>(f->fixture_data);
   grpc_arg arg = grpc_load_reporting_enable_arg();
   if (f->server) {
     grpc_server_destroy(f->server);
@@ -85,7 +87,8 @@ void chttp2_init_server_load_reporting(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_load_reporting(grpc_end2end_test_fixture *f) {
-  load_reporting_fixture_data *ffd = f->fixture_data;
+  load_reporting_fixture_data *ffd =
+      static_cast<load_reporting_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_oauth2.c b/test/core/end2end/fixtures/h2_oauth2.cc
index ee1d0b1416..f1e49f20cd 100644
--- a/test/core/end2end/fixtures/h2_oauth2.c
+++ b/test/core/end2end/fixtures/h2_oauth2.cc
@@ -92,7 +92,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
   fullstack_secure_fixture_data *ffd =
-      gpr_malloc(sizeof(fullstack_secure_fixture_data));
+      static_cast<fullstack_secure_fixture_data *>(
+          gpr_malloc(sizeof(fullstack_secure_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -107,7 +108,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
 static void chttp2_init_client_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args,
     grpc_channel_credentials *creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   f->client =
       grpc_secure_channel_create(creds, ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client != NULL);
@@ -117,7 +119,8 @@ static void chttp2_init_client_secure_fullstack(
 static void chttp2_init_server_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args,
     grpc_server_credentials *server_creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -130,7 +133,8 @@ static void chttp2_init_server_secure_fullstack(
 }
 
 void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
@@ -144,9 +148,10 @@ static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
       &exec_ctx, "authorization", oauth2_md, true /* is_async */);
   grpc_channel_credentials *ssl_oauth2_creds =
       grpc_composite_channel_credentials_create(ssl_creds, oauth2_creds, NULL);
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_oauth2_creds);
@@ -175,7 +180,8 @@ static void processor_destroy(void *state) {
 }
 
 static grpc_auth_metadata_processor test_processor_create(int failing) {
-  test_processor_state *s = gpr_malloc(sizeof(*s));
+  test_processor_state *s =
+      static_cast<test_processor_state *>(gpr_malloc(sizeof(*s)));
   grpc_auth_metadata_processor result;
   s->pseudo_refcount = 1;
   result.state = s;
diff --git a/test/core/end2end/fixtures/h2_proxy.c b/test/core/end2end/fixtures/h2_proxy.cc
index 069130baf4..e1eb9687d0 100644
--- a/test/core/end2end/fixtures/h2_proxy.c
+++ b/test/core/end2end/fixtures/h2_proxy.cc
@@ -58,7 +58,8 @@ static const grpc_end2end_proxy_def proxy_def = {create_proxy_server,
 static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   ffd->proxy = grpc_end2end_proxy_create(&proxy_def, client_args, server_args);
@@ -72,7 +73,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   f->client = grpc_insecure_channel_create(
       grpc_end2end_proxy_get_client_target(ffd->proxy), client_args, NULL);
   GPR_ASSERT(f->client);
@@ -80,7 +82,8 @@ void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -92,7 +95,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   grpc_end2end_proxy_destroy(ffd->proxy);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/h2_sockpair+trace.c b/test/core/end2end/fixtures/h2_sockpair+trace.cc
index 39ccb84b52..81d0768969 100644
--- a/test/core/end2end/fixtures/h2_sockpair+trace.c
+++ b/test/core/end2end/fixtures/h2_sockpair+trace.cc
@@ -49,9 +49,9 @@
    connected_channel without a client_channel */
 
 static void server_setup_transport(void *ts, grpc_transport *transport) {
-  grpc_end2end_test_fixture *f = ts;
+  grpc_end2end_test_fixture *f = static_cast<grpc_end2end_test_fixture *>(ts);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
   grpc_server_setup_transport(&exec_ctx, f->server, transport, NULL,
                               grpc_server_get_channel_args(f->server));
@@ -65,7 +65,7 @@ typedef struct {
 
 static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
                                    grpc_transport *transport) {
-  sp_client_setup *cs = ts;
+  sp_client_setup *cs = static_cast<sp_client_setup *>(ts);
 
   cs->f->client =
       grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
@@ -74,7 +74,8 @@ static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
-  grpc_endpoint_pair *sfd = gpr_malloc(sizeof(grpc_endpoint_pair));
+  grpc_endpoint_pair *sfd =
+      static_cast<grpc_endpoint_pair *>(gpr_malloc(sizeof(grpc_endpoint_pair)));
 
   grpc_end2end_test_fixture f;
   memset(&f, 0, sizeof(f));
@@ -90,7 +91,7 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *client_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_transport *transport;
   sp_client_setup cs;
   cs.client_args = client_args;
@@ -106,7 +107,7 @@ static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *server_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_transport *transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, NULL);
diff --git a/test/core/end2end/fixtures/h2_sockpair.c b/test/core/end2end/fixtures/h2_sockpair.cc
index 03566ead9b..78b5ad8877 100644
--- a/test/core/end2end/fixtures/h2_sockpair.c
+++ b/test/core/end2end/fixtures/h2_sockpair.cc
@@ -43,9 +43,9 @@
    connected_channel without a client_channel */
 
 static void server_setup_transport(void *ts, grpc_transport *transport) {
-  grpc_end2end_test_fixture *f = ts;
+  grpc_end2end_test_fixture *f = static_cast<grpc_end2end_test_fixture *>(ts);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
   grpc_server_setup_transport(&exec_ctx, f->server, transport, NULL,
                               grpc_server_get_channel_args(f->server));
@@ -59,7 +59,7 @@ typedef struct {
 
 static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
                                    grpc_transport *transport) {
-  sp_client_setup *cs = ts;
+  sp_client_setup *cs = static_cast<sp_client_setup *>(ts);
 
   cs->f->client =
       grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
@@ -68,7 +68,8 @@ static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
-  grpc_endpoint_pair *sfd = gpr_malloc(sizeof(grpc_endpoint_pair));
+  grpc_endpoint_pair *sfd =
+      static_cast<grpc_endpoint_pair *>(gpr_malloc(sizeof(grpc_endpoint_pair)));
 
   grpc_end2end_test_fixture f;
   memset(&f, 0, sizeof(f));
@@ -84,7 +85,7 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *client_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_transport *transport;
   sp_client_setup cs;
   cs.client_args = client_args;
@@ -100,7 +101,7 @@ static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *server_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_transport *transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, NULL);
diff --git a/test/core/end2end/fixtures/h2_sockpair_1byte.c b/test/core/end2end/fixtures/h2_sockpair_1byte.cc
index c75a3876d5..b144771f2a 100644
--- a/test/core/end2end/fixtures/h2_sockpair_1byte.c
+++ b/test/core/end2end/fixtures/h2_sockpair_1byte.cc
@@ -43,9 +43,9 @@
    connected_channel without a client_channel */
 
 static void server_setup_transport(void *ts, grpc_transport *transport) {
-  grpc_end2end_test_fixture *f = ts;
+  grpc_end2end_test_fixture *f = static_cast<grpc_end2end_test_fixture *>(ts);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_endpoint_add_to_pollset(&exec_ctx, sfd->server, grpc_cq_pollset(f->cq));
   grpc_server_setup_transport(&exec_ctx, f->server, transport, NULL,
                               grpc_server_get_channel_args(f->server));
@@ -59,7 +59,7 @@ typedef struct {
 
 static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
                                    grpc_transport *transport) {
-  sp_client_setup *cs = ts;
+  sp_client_setup *cs = static_cast<sp_client_setup *>(ts);
 
   cs->f->client =
       grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
@@ -68,7 +68,8 @@ static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
-  grpc_endpoint_pair *sfd = gpr_malloc(sizeof(grpc_endpoint_pair));
+  grpc_endpoint_pair *sfd =
+      static_cast<grpc_endpoint_pair *>(gpr_malloc(sizeof(grpc_endpoint_pair)));
 
   grpc_end2end_test_fixture f;
   memset(&f, 0, sizeof(f));
@@ -76,16 +77,17 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
   f.cq = grpc_completion_queue_create_for_next(NULL);
   f.shutdown_cq = grpc_completion_queue_create_for_pluck(NULL);
 
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = 1},
-                  {.key = GRPC_ARG_TCP_MIN_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = 1},
-                  {.key = GRPC_ARG_TCP_MAX_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = 1}};
-  grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+  grpc_arg a[3];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER;
+  a[0].value.integer = 1;
+  a[1].key = const_cast<char *>(GRPC_ARG_TCP_MIN_READ_CHUNK_SIZE);
+  a[1].type = GRPC_ARG_INTEGER;
+  a[1].value.integer = 1;
+  a[2].key = const_cast<char *>(GRPC_ARG_TCP_MAX_READ_CHUNK_SIZE);
+  a[2].type = GRPC_ARG_INTEGER;
+  a[2].value.integer = 1;
+  grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   *sfd = grpc_iomgr_create_endpoint_pair("fixture", &args);
 
   return f;
@@ -94,7 +96,7 @@ static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
 static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *client_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_transport *transport;
   sp_client_setup cs;
   cs.client_args = client_args;
@@ -110,7 +112,7 @@ static void chttp2_init_client_socketpair(grpc_end2end_test_fixture *f,
 static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
                                           grpc_channel_args *server_args) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_endpoint_pair *sfd = f->fixture_data;
+  grpc_endpoint_pair *sfd = static_cast<grpc_endpoint_pair *>(f->fixture_data);
   grpc_transport *transport;
   GPR_ASSERT(!f->server);
   f->server = grpc_server_create(server_args, NULL);
diff --git a/test/core/end2end/fixtures/h2_ssl.c b/test/core/end2end/fixtures/h2_ssl.cc
index 0bac464e69..045a8b7f05 100644
--- a/test/core/end2end/fixtures/h2_ssl.c
+++ b/test/core/end2end/fixtures/h2_ssl.cc
@@ -43,7 +43,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
   grpc_end2end_test_fixture f;
   int port = grpc_pick_unused_port_or_die();
   fullstack_secure_fixture_data *ffd =
-      gpr_malloc(sizeof(fullstack_secure_fixture_data));
+      static_cast<fullstack_secure_fixture_data *>(
+          gpr_malloc(sizeof(fullstack_secure_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_join_host_port(&ffd->localaddr, "localhost", port);
@@ -66,7 +67,8 @@ static void process_auth_failure(void *state, grpc_auth_context *ctx,
 static void chttp2_init_client_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args,
     grpc_channel_credentials *creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   f->client =
       grpc_secure_channel_create(creds, ffd->localaddr, client_args, NULL);
   GPR_ASSERT(f->client != NULL);
@@ -76,7 +78,8 @@ static void chttp2_init_client_secure_fullstack(
 static void chttp2_init_server_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args,
     grpc_server_credentials *server_creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -89,7 +92,8 @@ static void chttp2_init_server_secure_fullstack(
 }
 
 void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
@@ -98,9 +102,10 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args) {
   grpc_channel_credentials *ssl_creds =
       grpc_ssl_credentials_create(NULL, NULL, NULL);
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
diff --git a/test/core/end2end/fixtures/h2_ssl_proxy.c b/test/core/end2end/fixtures/h2_ssl_proxy.cc
index 8bc7183510..b9b68c8780 100644
--- a/test/core/end2end/fixtures/h2_ssl_proxy.c
+++ b/test/core/end2end/fixtures/h2_ssl_proxy.cc
@@ -56,9 +56,10 @@ static grpc_channel *create_proxy_client(const char *target,
   grpc_channel *channel;
   grpc_channel_credentials *ssl_creds =
       grpc_ssl_credentials_create(NULL, NULL, NULL);
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   channel =
@@ -79,7 +80,8 @@ static grpc_end2end_test_fixture chttp2_create_fixture_secure_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
   fullstack_secure_fixture_data *ffd =
-      gpr_malloc(sizeof(fullstack_secure_fixture_data));
+      static_cast<fullstack_secure_fixture_data *>(
+          gpr_malloc(sizeof(fullstack_secure_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   ffd->proxy = grpc_end2end_proxy_create(&proxy_def, client_args, server_args);
@@ -102,7 +104,8 @@ static void process_auth_failure(void *state, grpc_auth_context *ctx,
 static void chttp2_init_client_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args,
     grpc_channel_credentials *creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   f->client = grpc_secure_channel_create(
       creds, grpc_end2end_proxy_get_client_target(ffd->proxy), client_args,
       NULL);
@@ -113,7 +116,8 @@ static void chttp2_init_client_secure_fullstack(
 static void chttp2_init_server_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *server_args,
     grpc_server_credentials *server_creds) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -126,7 +130,8 @@ static void chttp2_init_server_secure_fullstack(
 }
 
 void chttp2_tear_down_secure_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_secure_fixture_data *ffd = f->fixture_data;
+  fullstack_secure_fixture_data *ffd =
+      static_cast<fullstack_secure_fixture_data *>(f->fixture_data);
   grpc_end2end_proxy_destroy(ffd->proxy);
   gpr_free(ffd);
 }
@@ -135,9 +140,10 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
     grpc_end2end_test_fixture *f, grpc_channel_args *client_args) {
   grpc_channel_credentials *ssl_creds =
       grpc_ssl_credentials_create(NULL, NULL, NULL);
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
diff --git a/test/core/end2end/fixtures/h2_uds.c b/test/core/end2end/fixtures/h2_uds.cc
index 05a31985e7..f9336b5edc 100644
--- a/test/core/end2end/fixtures/h2_uds.c
+++ b/test/core/end2end/fixtures/h2_uds.cc
@@ -48,7 +48,8 @@ static int unique = 1;
 static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  fullstack_fixture_data *ffd = static_cast<fullstack_fixture_data *>(
+      gpr_malloc(sizeof(fullstack_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   gpr_asprintf(&ffd->localaddr, "unix:/tmp/grpc_fullstack_test.%d.%d", getpid(),
@@ -63,13 +64,15 @@ static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
 
 void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *client_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
 }
 
 void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
                                   grpc_channel_args *server_args) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   if (f->server) {
     grpc_server_destroy(f->server);
   }
@@ -80,7 +83,8 @@ void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
 }
 
 void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
-  fullstack_fixture_data *ffd = f->fixture_data;
+  fullstack_fixture_data *ffd =
+      static_cast<fullstack_fixture_data *>(f->fixture_data);
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
 }
diff --git a/test/core/end2end/fixtures/http_proxy_fixture.c b/test/core/end2end/fixtures/http_proxy_fixture.cc
index d29401fdc3..d29401fdc3 100644
--- a/test/core/end2end/fixtures/http_proxy_fixture.c
+++ b/test/core/end2end/fixtures/http_proxy_fixture.cc
diff --git a/test/core/end2end/fixtures/inproc.c b/test/core/end2end/fixtures/inproc.cc
index 6f742f0293..c075dc629f 100644
--- a/test/core/end2end/fixtures/inproc.c
+++ b/test/core/end2end/fixtures/inproc.cc
@@ -42,7 +42,8 @@ typedef struct inproc_fixture_data {
 static grpc_end2end_test_fixture inproc_create_fixture(
     grpc_channel_args *client_args, grpc_channel_args *server_args) {
   grpc_end2end_test_fixture f;
-  inproc_fixture_data *ffd = gpr_malloc(sizeof(inproc_fixture_data));
+  inproc_fixture_data *ffd = static_cast<inproc_fixture_data *>(
+      gpr_malloc(sizeof(inproc_fixture_data)));
   memset(&f, 0, sizeof(f));
 
   f.fixture_data = ffd;
@@ -69,7 +70,8 @@ void inproc_init_server(grpc_end2end_test_fixture *f,
 }
 
 void inproc_tear_down(grpc_end2end_test_fixture *f) {
-  inproc_fixture_data *ffd = f->fixture_data;
+  inproc_fixture_data *ffd =
+      static_cast<inproc_fixture_data *>(f->fixture_data);
   gpr_free(ffd);
 }
 
diff --git a/test/core/end2end/fixtures/proxy.c b/test/core/end2end/fixtures/proxy.cc
index 6a2d75da09..6a2d75da09 100644
--- a/test/core/end2end/fixtures/proxy.c
+++ b/test/core/end2end/fixtures/proxy.cc
diff --git a/test/core/end2end/fuzzers/api_fuzzer.c b/test/core/end2end/fuzzers/api_fuzzer.cc
index 0a787bbf30..2db8ed474a 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.c
+++ b/test/core/end2end/fuzzers/api_fuzzer.cc
@@ -91,7 +91,7 @@ static char *read_string(input_stream *inp, bool *special) {
   do {
     if (cap == sz) {
       cap = GPR_MAX(3 * cap / 2, cap + 8);
-      str = gpr_realloc(str, cap);
+      str = static_cast<char *>(gpr_realloc(str, cap));
     }
     c = (char)next_byte(inp);
     str[sz++] = c;
@@ -114,7 +114,7 @@ static void read_buffer(input_stream *inp, char **buffer, size_t *length,
   } else {
     if (special != NULL) *special = false;
   }
-  *buffer = gpr_malloc(*length);
+  *buffer = static_cast<char *>(gpr_malloc(*length));
   for (size_t i = 0; i < *length; i++) {
     (*buffer)[i] = (char)next_byte(inp);
   }
@@ -196,7 +196,7 @@ static int read_int(input_stream *inp) { return (int)read_uint32(inp); }
 
 static grpc_channel_args *read_args(input_stream *inp) {
   size_t n = next_byte(inp);
-  grpc_arg *args = gpr_malloc(sizeof(*args) * n);
+  grpc_arg *args = static_cast<grpc_arg *>(gpr_malloc(sizeof(*args) * n));
   for (size_t i = 0; i < n; i++) {
     switch (next_byte(inp)) {
       case 1:
@@ -222,7 +222,8 @@ static grpc_channel_args *read_args(input_stream *inp) {
         break;
     }
   }
-  grpc_channel_args *a = gpr_malloc(sizeof(*a));
+  grpc_channel_args *a =
+      static_cast<grpc_channel_args *>(gpr_malloc(sizeof(*a)));
   a->args = args;
   a->num_args = n;
   return a;
@@ -373,13 +374,15 @@ typedef struct addr_req {
 
 static void finish_resolve(grpc_exec_ctx *exec_ctx, void *arg,
                            grpc_error *error) {
-  addr_req *r = arg;
+  addr_req *r = static_cast<addr_req *>(arg);
 
   if (error == GRPC_ERROR_NONE && 0 == strcmp(r->addr, "server")) {
     if (r->addrs != NULL) {
-      grpc_resolved_addresses *addrs = gpr_malloc(sizeof(*addrs));
+      grpc_resolved_addresses *addrs =
+          static_cast<grpc_resolved_addresses *>(gpr_malloc(sizeof(*addrs)));
       addrs->naddrs = 1;
-      addrs->addrs = gpr_malloc(sizeof(*addrs->addrs));
+      addrs->addrs = static_cast<grpc_resolved_address *>(
+          gpr_malloc(sizeof(*addrs->addrs)));
       addrs->addrs[0].len = 0;
       *r->addrs = addrs;
     } else if (r->lb_addrs != NULL) {
@@ -403,7 +406,7 @@ void my_resolve_address(grpc_exec_ctx *exec_ctx, const char *addr,
                         grpc_pollset_set *interested_parties,
                         grpc_closure *on_done,
                         grpc_resolved_addresses **addresses) {
-  addr_req *r = gpr_malloc(sizeof(*r));
+  addr_req *r = static_cast<addr_req *>(gpr_malloc(sizeof(*r)));
   r->addr = gpr_strdup(addr);
   r->on_done = on_done;
   r->addrs = addresses;
@@ -418,7 +421,7 @@ grpc_ares_request *my_dns_lookup_ares(
     const char *default_port, grpc_pollset_set *interested_parties,
     grpc_closure *on_done, grpc_lb_addresses **lb_addrs, bool check_grpclb,
     char **service_config_json) {
-  addr_req *r = gpr_malloc(sizeof(*r));
+  addr_req *r = static_cast<addr_req *>(gpr_malloc(sizeof(*r)));
   r->addr = gpr_strdup(addr);
   r->on_done = on_done;
   r->addrs = NULL;
@@ -449,7 +452,7 @@ typedef struct {
 } future_connect;
 
 static void do_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  future_connect *fc = arg;
+  future_connect *fc = static_cast<future_connect *>(arg);
   if (error != GRPC_ERROR_NONE) {
     *fc->ep = NULL;
     GRPC_CLOSURE_SCHED(exec_ctx, fc->closure, GRPC_ERROR_REF(error));
@@ -480,7 +483,7 @@ static void sched_connect(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
     return;
   }
 
-  future_connect *fc = gpr_malloc(sizeof(*fc));
+  future_connect *fc = static_cast<future_connect *>(gpr_malloc(sizeof(*fc)));
   fc->closure = closure;
   fc->ep = ep;
   fc->deadline = deadline;
@@ -508,7 +511,7 @@ typedef struct validator {
 
 static validator *create_validator(void (*validate)(void *arg, bool success),
                                    void *arg) {
-  validator *v = gpr_malloc(sizeof(*v));
+  validator *v = static_cast<validator *>(gpr_malloc(sizeof(*v)));
   v->validate = validate;
   v->arg = arg;
   return v;
@@ -528,14 +531,15 @@ typedef struct connectivity_watch {
 
 static connectivity_watch *make_connectivity_watch(gpr_timespec s,
                                                    int *counter) {
-  connectivity_watch *o = gpr_malloc(sizeof(*o));
+  connectivity_watch *o =
+      static_cast<connectivity_watch *>(gpr_malloc(sizeof(*o)));
   o->deadline = s;
   o->counter = counter;
   return o;
 }
 
 static void validate_connectivity_watch(void *p, bool success) {
-  connectivity_watch *w = p;
+  connectivity_watch *w = static_cast<connectivity_watch *>(p);
   if (!success) {
     GPR_ASSERT(gpr_time_cmp(gpr_now(w->deadline.clock_type), w->deadline) >= 0);
   }
@@ -585,7 +589,7 @@ typedef struct call_state {
 static call_state *g_active_call;
 
 static call_state *new_call(call_state *sibling, call_state_type type) {
-  call_state *c = gpr_malloc(sizeof(*c));
+  call_state *c = static_cast<call_state *>(gpr_malloc(sizeof(*c)));
   memset(c, 0, sizeof(*c));
   if (sibling != NULL) {
     c->next = sibling;
@@ -634,8 +638,8 @@ static call_state *maybe_delete_call_state(call_state *call) {
 static void add_to_free(call_state *call, void *p) {
   if (call->num_to_free == call->cap_to_free) {
     call->cap_to_free = GPR_MAX(8, 2 * call->cap_to_free);
-    call->to_free =
-        gpr_realloc(call->to_free, sizeof(*call->to_free) * call->cap_to_free);
+    call->to_free = static_cast<void **>(
+        gpr_realloc(call->to_free, sizeof(*call->to_free) * call->cap_to_free));
   }
   call->to_free[call->num_to_free++] = p;
 }
@@ -643,12 +647,12 @@ static void add_to_free(call_state *call, void *p) {
 static grpc_slice *add_slice_to_unref(call_state *call, grpc_slice s) {
   if (call->num_slices_to_unref == call->cap_slices_to_unref) {
     call->cap_slices_to_unref = GPR_MAX(8, 2 * call->cap_slices_to_unref);
-    call->slices_to_unref =
-        gpr_realloc(call->slices_to_unref,
-                    sizeof(*call->slices_to_unref) * call->cap_slices_to_unref);
+    call->slices_to_unref = static_cast<grpc_slice **>(gpr_realloc(
+        call->slices_to_unref,
+        sizeof(*call->slices_to_unref) * call->cap_slices_to_unref));
   }
   call->slices_to_unref[call->num_slices_to_unref] =
-      gpr_malloc(sizeof(grpc_slice));
+      static_cast<grpc_slice *>(gpr_malloc(sizeof(grpc_slice)));
   *call->slices_to_unref[call->num_slices_to_unref++] = s;
   return call->slices_to_unref[call->num_slices_to_unref - 1];
 }
@@ -657,7 +661,8 @@ static void read_metadata(input_stream *inp, size_t *count,
                           grpc_metadata **metadata, call_state *cs) {
   *count = next_byte(inp);
   if (*count) {
-    *metadata = gpr_malloc(*count * sizeof(**metadata));
+    *metadata =
+        static_cast<grpc_metadata *>(gpr_malloc(*count * sizeof(**metadata)));
     memset(*metadata, 0, *count * sizeof(**metadata));
     for (size_t i = 0; i < *count; i++) {
       (*metadata)[i].key = read_string_like_slice(inp);
@@ -667,7 +672,7 @@ static void read_metadata(input_stream *inp, size_t *count,
       add_slice_to_unref(cs, (*metadata)[i].value);
     }
   } else {
-    *metadata = gpr_malloc(1);
+    *metadata = static_cast<grpc_metadata *>(gpr_malloc(1));
   }
   add_to_free(cs, *metadata);
 }
@@ -679,7 +684,7 @@ static call_state *destroy_call(call_state *call) {
 }
 
 static void finished_request_call(void *csp, bool success) {
-  call_state *cs = csp;
+  call_state *cs = static_cast<call_state *>(csp);
   GPR_ASSERT(cs->pending_ops > 0);
   --cs->pending_ops;
   if (success) {
@@ -696,7 +701,7 @@ typedef struct {
 } batch_info;
 
 static void finished_batch(void *p, bool success) {
-  batch_info *bi = p;
+  batch_info *bi = static_cast<batch_info *>(p);
   --bi->cs->pending_ops;
   if ((bi->has_ops & (1u << GRPC_OP_RECV_MESSAGE)) &&
       (bi->cs->done_flags & DONE_FLAG_CALL_CLOSED)) {
@@ -721,7 +726,7 @@ static void finished_batch(void *p, bool success) {
 
 static validator *make_finished_batch_validator(call_state *cs,
                                                 uint8_t has_ops) {
-  batch_info *bi = gpr_malloc(sizeof(*bi));
+  batch_info *bi = static_cast<batch_info *>(gpr_malloc(sizeof(*bi)));
   bi->cs = cs;
   bi->has_ops = has_ops;
   return create_validator(finished_batch, bi);
@@ -803,7 +808,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
             cq, gpr_inf_past(GPR_CLOCK_REALTIME), NULL);
         switch (ev.type) {
           case GRPC_OP_COMPLETE: {
-            validator *v = ev.tag;
+            validator *v = static_cast<validator *>(ev.tag);
             v->validate(v->arg, ev.success);
             gpr_free(v);
             break;
@@ -992,7 +997,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
           end(&inp);
           break;
         }
-        grpc_op *ops = gpr_malloc(sizeof(grpc_op) * num_ops);
+        grpc_op *ops =
+            static_cast<grpc_op *>(gpr_malloc(sizeof(grpc_op) * num_ops));
         if (num_ops > 0) memset(ops, 0, sizeof(grpc_op) * num_ops);
         bool ok = true;
         size_t i;
@@ -1035,7 +1041,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
                   &op->data.send_status_from_server.trailing_metadata_count,
                   &op->data.send_status_from_server.trailing_metadata,
                   g_active_call);
-              op->data.send_status_from_server.status = next_byte(&inp);
+              op->data.send_status_from_server.status =
+                  static_cast<grpc_status_code>(next_byte(&inp));
               op->data.send_status_from_server.status_details =
                   add_slice_to_unref(g_active_call,
                                      read_buffer_like_slice(&inp));
diff --git a/test/core/end2end/fuzzers/client_fuzzer.c b/test/core/end2end/fuzzers/client_fuzzer.cc
index 88ba6bad83..88ba6bad83 100644
--- a/test/core/end2end/fuzzers/client_fuzzer.c
+++ b/test/core/end2end/fuzzers/client_fuzzer.cc
diff --git a/test/core/end2end/fuzzers/server_fuzzer.c b/test/core/end2end/fuzzers/server_fuzzer.cc
index ef4c0a4bfd..ef4c0a4bfd 100644
--- a/test/core/end2end/fuzzers/server_fuzzer.c
+++ b/test/core/end2end/fuzzers/server_fuzzer.cc
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index f7f996d5c1..7c8e7f420a 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -220,9 +220,9 @@ def main():
               'build': 'private',
               'language': 'c',
               'secure': True,
-              'src': ['test/core/end2end/end2end_tests.c',
-                      'test/core/end2end/end2end_test_utils.c'] + [
-                  'test/core/end2end/tests/%s.c' % t
+              'src': ['test/core/end2end/end2end_tests.cc',
+                      'test/core/end2end/end2end_test_utils.cc'] + [
+                  'test/core/end2end/tests/%s.cc' % t
                   for t in sorted(END2END_TESTS.keys())],
               'headers': ['test/core/end2end/tests/cancel_test_helpers.h',
                           'test/core/end2end/end2end_tests.h'],
@@ -235,9 +235,9 @@ def main():
               'build': 'private',
               'language': 'c',
               'secure': False,
-              'src': ['test/core/end2end/end2end_nosec_tests.c',
-                      'test/core/end2end/end2end_test_utils.c'] + [
-                  'test/core/end2end/tests/%s.c' % t
+              'src': ['test/core/end2end/end2end_nosec_tests.cc',
+                      'test/core/end2end/end2end_test_utils.cc'] + [
+                  'test/core/end2end/tests/%s.cc' % t
                   for t in sorted(END2END_TESTS.keys())
                   if not END2END_TESTS[t].secure],
               'headers': ['test/core/end2end/tests/cancel_test_helpers.h',
@@ -252,7 +252,7 @@ def main():
               'build': 'test',
               'language': 'c',
               'run': False,
-              'src': ['test/core/end2end/fixtures/%s.c' % f],
+              'src': ['test/core/end2end/fixtures/%s.cc' % f],
               'platforms': END2END_FIXTURES[f].platforms,
               'ci_platforms': (END2END_FIXTURES[f].platforms
                                if END2END_FIXTURES[f].ci_mac else without(
@@ -269,7 +269,7 @@ def main():
               'build': 'test',
               'language': 'c',
               'secure': False,
-              'src': ['test/core/end2end/fixtures/%s.c' % f],
+              'src': ['test/core/end2end/fixtures/%s.cc' % f],
               'run': False,
               'platforms': END2END_FIXTURES[f].platforms,
               'ci_platforms': (END2END_FIXTURES[f].platforms
diff --git a/test/core/end2end/generate_tests.bzl b/test/core/end2end/generate_tests.bzl
index 89a95edfd7..94f9f98a2a 100755
--- a/test/core/end2end/generate_tests.bzl
+++ b/test/core/end2end/generate_tests.bzl
@@ -186,8 +186,8 @@ def compatible(fopt, topt):
 def grpc_end2end_tests():
   grpc_cc_library(
     name = 'end2end_tests',
-    srcs = ['end2end_tests.c', 'end2end_test_utils.c'] + [
-             'tests/%s.c' % t
+    srcs = ['end2end_tests.cc', 'end2end_test_utils.cc'] + [
+             'tests/%s.cc' % t
              for t in sorted(END2END_TESTS.keys())],
     hdrs = [
       'tests/cancel_test_helpers.h',
@@ -205,7 +205,7 @@ def grpc_end2end_tests():
   for f, fopt in END2END_FIXTURES.items():
     grpc_cc_binary(
       name = '%s_test' % f,
-      srcs = ['fixtures/%s.c' % f],
+      srcs = ['fixtures/%s.cc' % f],
       language = "C",
       deps = [
         ':end2end_tests',
diff --git a/test/core/end2end/goaway_server_test.c b/test/core/end2end/goaway_server_test.cc
index c3aca13249..c0d7fb81b5 100644
--- a/test/core/end2end/goaway_server_test.c
+++ b/test/core/end2end/goaway_server_test.cc
@@ -74,9 +74,11 @@ static void my_resolve_address(grpc_exec_ctx *exec_ctx, const char *addr,
     gpr_mu_unlock(&g_mu);
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Failure");
   } else {
-    *addrs = gpr_malloc(sizeof(**addrs));
+    *addrs =
+        static_cast<grpc_resolved_addresses *>(gpr_malloc(sizeof(**addrs)));
     (*addrs)->naddrs = 1;
-    (*addrs)->addrs = gpr_malloc(sizeof(*(*addrs)->addrs));
+    (*addrs)->addrs = static_cast<grpc_resolved_address *>(
+        gpr_malloc(sizeof(*(*addrs)->addrs)));
     memset((*addrs)->addrs, 0, sizeof(*(*addrs)->addrs));
     struct sockaddr_in *sa = (struct sockaddr_in *)(*addrs)->addrs[0].addr;
     sa->sin_family = AF_INET;
@@ -106,7 +108,8 @@ static grpc_ares_request *my_dns_lookup_ares(
     error = GRPC_ERROR_CREATE_FROM_STATIC_STRING("Forced Failure");
   } else {
     *lb_addrs = grpc_lb_addresses_create(1, NULL);
-    struct sockaddr_in *sa = gpr_zalloc(sizeof(struct sockaddr_in));
+    struct sockaddr_in *sa = static_cast<struct sockaddr_in *>(
+        gpr_zalloc(sizeof(struct sockaddr_in)));
     sa->sin_family = AF_INET;
     sa->sin_addr.s_addr = htonl(0x7f000001);
     sa->sin_port = htons((uint16_t)g_resolve_port);
@@ -167,7 +170,8 @@ int main(int argc, char **argv) {
   grpc_channel_args client_args;
   grpc_arg arg_array[1];
   arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+  arg_array[0].key =
+      const_cast<char *>("grpc.testing.fixed_reconnect_backoff_ms");
   arg_array[0].value.integer = 1000;
   client_args.args = arg_array;
   client_args.num_args = 1;
diff --git a/test/core/end2end/invalid_call_argument_test.c b/test/core/end2end/invalid_call_argument_test.cc
index e3fd5a8fbe..ac704a6bc0 100644
--- a/test/core/end2end/invalid_call_argument_test.c
+++ b/test/core/end2end/invalid_call_argument_test.cc
@@ -258,7 +258,7 @@ static void test_send_messages_at_the_same_time() {
   op->reserved = NULL;
   op++;
   op->op = GRPC_OP_SEND_MESSAGE;
-  op->data.send_message.send_message = tag(2);
+  op->data.send_message.send_message = static_cast<grpc_byte_buffer *>(tag(2));
   op->flags = 0;
   op->reserved = NULL;
   op++;
diff --git a/test/core/end2end/multiple_server_queues_test.c b/test/core/end2end/multiple_server_queues_test.cc
index f231c62dd0..f231c62dd0 100644
--- a/test/core/end2end/multiple_server_queues_test.c
+++ b/test/core/end2end/multiple_server_queues_test.cc
diff --git a/test/core/end2end/no_server_test.c b/test/core/end2end/no_server_test.cc
index 962499bb4f..962499bb4f 100644
--- a/test/core/end2end/no_server_test.c
+++ b/test/core/end2end/no_server_test.cc
diff --git a/test/core/end2end/tests/authority_not_supported.c b/test/core/end2end/tests/authority_not_supported.cc
index b54d6d0d6f..b54d6d0d6f 100644
--- a/test/core/end2end/tests/authority_not_supported.c
+++ b/test/core/end2end/tests/authority_not_supported.cc
diff --git a/test/core/end2end/tests/bad_hostname.c b/test/core/end2end/tests/bad_hostname.cc
index 32093f2ecf..32093f2ecf 100644
--- a/test/core/end2end/tests/bad_hostname.c
+++ b/test/core/end2end/tests/bad_hostname.cc
diff --git a/test/core/end2end/tests/bad_ping.c b/test/core/end2end/tests/bad_ping.cc
index 34cc8e78cd..50e02ed720 100644
--- a/test/core/end2end/tests/bad_ping.c
+++ b/test/core/end2end/tests/bad_ping.cc
@@ -66,30 +66,30 @@ static void end_test(grpc_end2end_test_fixture *f) {
 static void test_bad_ping(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = config.create_fixture(NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
-  grpc_arg client_a[] = {
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS,
-       .value.integer = 10},
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA,
-       .value.integer = 0},
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_BDP_PROBE,
-       .value.integer = 0}};
-  grpc_arg server_a[] = {
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS,
-       .value.integer = 300000 /* 5 minutes */},
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MAX_PING_STRIKES,
-       .value.integer = MAX_PING_STRIKES},
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_BDP_PROBE,
-       .value.integer = 0}};
-  grpc_channel_args client_args = {.num_args = GPR_ARRAY_SIZE(client_a),
-                                   .args = client_a};
-  grpc_channel_args server_args = {.num_args = GPR_ARRAY_SIZE(server_a),
-                                   .args = server_a};
+  grpc_arg client_a[3];
+  client_a[0].type = GRPC_ARG_INTEGER;
+  client_a[0].key =
+      const_cast<char *>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
+  client_a[0].value.integer = 10;
+  client_a[1].type = GRPC_ARG_INTEGER;
+  client_a[1].key = const_cast<char *>(GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA);
+  client_a[1].value.integer = 0;
+  client_a[2].type = GRPC_ARG_INTEGER;
+  client_a[2].key = const_cast<char *>(GRPC_ARG_HTTP2_BDP_PROBE);
+  client_a[2].value.integer = 0;
+  grpc_arg server_a[3];
+  server_a[0].type = GRPC_ARG_INTEGER;
+  server_a[0].key =
+      const_cast<char *>(GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS);
+  server_a[0].value.integer = 300000 /* 5 minutes */;
+  server_a[1].type = GRPC_ARG_INTEGER;
+  server_a[1].key = const_cast<char *>(GRPC_ARG_HTTP2_MAX_PING_STRIKES);
+  server_a[1].value.integer = MAX_PING_STRIKES;
+  server_a[2].type = GRPC_ARG_INTEGER;
+  server_a[2].key = const_cast<char *>(GRPC_ARG_HTTP2_BDP_PROBE);
+  server_a[2].value.integer = 0;
+  grpc_channel_args client_args = {GPR_ARRAY_SIZE(client_a), client_a};
+  grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};
 
   config.init_client(&f, &client_args);
   config.init_server(&f, &server_args);
diff --git a/test/core/end2end/tests/binary_metadata.c b/test/core/end2end/tests/binary_metadata.cc
index e949daee1d..e949daee1d 100644
--- a/test/core/end2end/tests/binary_metadata.c
+++ b/test/core/end2end/tests/binary_metadata.cc
diff --git a/test/core/end2end/tests/call_creds.c b/test/core/end2end/tests/call_creds.cc
index 600005c9a9..dfe6d19160 100644
--- a/test/core/end2end/tests/call_creds.c
+++ b/test/core/end2end/tests/call_creds.cc
@@ -49,7 +49,9 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   config.init_client(&f, NULL);
   if (fail_server_auth_check) {
     grpc_arg fail_auth_arg = {
-        GRPC_ARG_STRING, FAIL_AUTH_CHECK_SERVER_ARG_NAME, {NULL}};
+        GRPC_ARG_STRING,
+        const_cast<char *>(FAIL_AUTH_CHECK_SERVER_ARG_NAME),
+        {NULL}};
     grpc_channel_args args;
     args.num_args = 1;
     args.args = &fail_auth_arg;
diff --git a/test/core/end2end/tests/cancel_after_accept.c b/test/core/end2end/tests/cancel_after_accept.cc
index c3ac0c3201..58e807b83b 100644
--- a/test/core/end2end/tests/cancel_after_accept.c
+++ b/test/core/end2end/tests/cancel_after_accept.cc
@@ -125,8 +125,8 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
   if (use_service_config) {
     grpc_arg arg;
     arg.type = GRPC_ARG_STRING;
-    arg.key = GRPC_ARG_SERVICE_CONFIG;
-    arg.value.string =
+    arg.key = const_cast<char *>(GRPC_ARG_SERVICE_CONFIG);
+    arg.value.string = const_cast<char *>(
         "{\n"
         "  \"methodConfig\": [ {\n"
         "    \"name\": [\n"
@@ -134,7 +134,7 @@ static void test_cancel_after_accept(grpc_end2end_test_config config,
         "    ],\n"
         "    \"timeout\": \"5s\"\n"
         "  } ]\n"
-        "}";
+        "}");
     args = grpc_channel_args_copy_and_add(args, &arg, 1);
   }
 
diff --git a/test/core/end2end/tests/cancel_after_client_done.c b/test/core/end2end/tests/cancel_after_client_done.cc
index 0e2a751d83..0e2a751d83 100644
--- a/test/core/end2end/tests/cancel_after_client_done.c
+++ b/test/core/end2end/tests/cancel_after_client_done.cc
diff --git a/test/core/end2end/tests/cancel_after_invoke.c b/test/core/end2end/tests/cancel_after_invoke.cc
index aad9fdbf94..aad9fdbf94 100644
--- a/test/core/end2end/tests/cancel_after_invoke.c
+++ b/test/core/end2end/tests/cancel_after_invoke.cc
diff --git a/test/core/end2end/tests/cancel_after_round_trip.c b/test/core/end2end/tests/cancel_after_round_trip.cc
index bc41bd3a6d..202eeb5fb6 100644
--- a/test/core/end2end/tests/cancel_after_round_trip.c
+++ b/test/core/end2end/tests/cancel_after_round_trip.cc
@@ -127,8 +127,8 @@ static void test_cancel_after_round_trip(grpc_end2end_test_config config,
   if (use_service_config) {
     grpc_arg arg;
     arg.type = GRPC_ARG_STRING;
-    arg.key = GRPC_ARG_SERVICE_CONFIG;
-    arg.value.string =
+    arg.key = const_cast<char *>(GRPC_ARG_SERVICE_CONFIG);
+    arg.value.string = const_cast<char *>(
         "{\n"
         "  \"methodConfig\": [ {\n"
         "    \"name\": [\n"
@@ -136,7 +136,7 @@ static void test_cancel_after_round_trip(grpc_end2end_test_config config,
         "    ],\n"
         "    \"timeout\": \"5s\"\n"
         "  } ]\n"
-        "}";
+        "}");
     args = grpc_channel_args_copy_and_add(args, &arg, 1);
   }
 
diff --git a/test/core/end2end/tests/cancel_before_invoke.c b/test/core/end2end/tests/cancel_before_invoke.cc
index 397e8b8ba6..397e8b8ba6 100644
--- a/test/core/end2end/tests/cancel_before_invoke.c
+++ b/test/core/end2end/tests/cancel_before_invoke.cc
diff --git a/test/core/end2end/tests/cancel_in_a_vacuum.c b/test/core/end2end/tests/cancel_in_a_vacuum.cc
index cd9551bef9..cd9551bef9 100644
--- a/test/core/end2end/tests/cancel_in_a_vacuum.c
+++ b/test/core/end2end/tests/cancel_in_a_vacuum.cc
diff --git a/test/core/end2end/tests/cancel_with_status.c b/test/core/end2end/tests/cancel_with_status.cc
index ab8c4f4187..ab8c4f4187 100644
--- a/test/core/end2end/tests/cancel_with_status.c
+++ b/test/core/end2end/tests/cancel_with_status.cc
diff --git a/test/core/end2end/tests/compressed_payload.c b/test/core/end2end/tests/compressed_payload.cc
index ba03773036..ba03773036 100644
--- a/test/core/end2end/tests/compressed_payload.c
+++ b/test/core/end2end/tests/compressed_payload.cc
diff --git a/test/core/end2end/tests/connectivity.c b/test/core/end2end/tests/connectivity.cc
index 610243ee3a..2cba25965a 100644
--- a/test/core/end2end/tests/connectivity.c
+++ b/test/core/end2end/tests/connectivity.cc
@@ -56,7 +56,8 @@ static void test_connectivity(grpc_end2end_test_config config) {
   grpc_channel_args client_args;
   grpc_arg arg_array[1];
   arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+  arg_array[0].key =
+      const_cast<char *>("grpc.testing.fixed_reconnect_backoff_ms");
   arg_array[0].value.integer = 1000;
   client_args.args = arg_array;
   client_args.num_args = 1;
diff --git a/test/core/end2end/tests/default_host.c b/test/core/end2end/tests/default_host.cc
index d1db9b342a..d1db9b342a 100644
--- a/test/core/end2end/tests/default_host.c
+++ b/test/core/end2end/tests/default_host.cc
diff --git a/test/core/end2end/tests/disappearing_server.c b/test/core/end2end/tests/disappearing_server.cc
index 19e4c05605..19e4c05605 100644
--- a/test/core/end2end/tests/disappearing_server.c
+++ b/test/core/end2end/tests/disappearing_server.cc
diff --git a/test/core/end2end/tests/empty_batch.c b/test/core/end2end/tests/empty_batch.cc
index ee57c16780..ee57c16780 100644
--- a/test/core/end2end/tests/empty_batch.c
+++ b/test/core/end2end/tests/empty_batch.cc
diff --git a/test/core/end2end/tests/filter_call_init_fails.c b/test/core/end2end/tests/filter_call_init_fails.cc
index 09e9dbcd7b..09e9dbcd7b 100644
--- a/test/core/end2end/tests/filter_call_init_fails.c
+++ b/test/core/end2end/tests/filter_call_init_fails.cc
diff --git a/test/core/end2end/tests/filter_causes_close.c b/test/core/end2end/tests/filter_causes_close.cc
index ee7aeb3f33..ee7aeb3f33 100644
--- a/test/core/end2end/tests/filter_causes_close.c
+++ b/test/core/end2end/tests/filter_causes_close.cc
diff --git a/test/core/end2end/tests/filter_latency.c b/test/core/end2end/tests/filter_latency.cc
index c24934f05d..c24934f05d 100644
--- a/test/core/end2end/tests/filter_latency.c
+++ b/test/core/end2end/tests/filter_latency.cc
diff --git a/test/core/end2end/tests/graceful_server_shutdown.c b/test/core/end2end/tests/graceful_server_shutdown.cc
index 9b3ff98195..9b3ff98195 100644
--- a/test/core/end2end/tests/graceful_server_shutdown.c
+++ b/test/core/end2end/tests/graceful_server_shutdown.cc
diff --git a/test/core/end2end/tests/high_initial_seqno.c b/test/core/end2end/tests/high_initial_seqno.cc
index 04b94838bb..2b72d09e68 100644
--- a/test/core/end2end/tests/high_initial_seqno.c
+++ b/test/core/end2end/tests/high_initial_seqno.cc
@@ -211,7 +211,7 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config,
   char *name;
 
   client_arg.type = GRPC_ARG_INTEGER;
-  client_arg.key = GRPC_ARG_HTTP2_INITIAL_SEQUENCE_NUMBER;
+  client_arg.key = const_cast<char *>(GRPC_ARG_HTTP2_INITIAL_SEQUENCE_NUMBER);
   client_arg.value.integer = initial_sequence_number;
 
   client_args.num_args = 1;
diff --git a/test/core/end2end/tests/hpack_size.c b/test/core/end2end/tests/hpack_size.cc
index 9358c119b1..e838be9f8b 100644
--- a/test/core/end2end/tests/hpack_size.c
+++ b/test/core/end2end/tests/hpack_size.cc
@@ -360,13 +360,13 @@ static void test_size(grpc_end2end_test_config config, int encode_size,
   char *name;
 
   server_arg.type = GRPC_ARG_INTEGER;
-  server_arg.key = GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_DECODER;
+  server_arg.key = const_cast<char *>(GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_DECODER);
   server_arg.value.integer = decode_size;
   server_args.num_args = 1;
   server_args.args = &server_arg;
 
   client_arg.type = GRPC_ARG_INTEGER;
-  client_arg.key = GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_ENCODER;
+  client_arg.key = const_cast<char *>(GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_ENCODER);
   client_arg.value.integer = encode_size;
   client_args.num_args = 1;
   client_args.args = &client_arg;
diff --git a/test/core/end2end/tests/idempotent_request.c b/test/core/end2end/tests/idempotent_request.cc
index 829ece6631..829ece6631 100644
--- a/test/core/end2end/tests/idempotent_request.c
+++ b/test/core/end2end/tests/idempotent_request.cc
diff --git a/test/core/end2end/tests/invoke_large_request.c b/test/core/end2end/tests/invoke_large_request.cc
index ff269fa3ee..c0e63103a8 100644
--- a/test/core/end2end/tests/invoke_large_request.c
+++ b/test/core/end2end/tests/invoke_large_request.cc
@@ -96,10 +96,10 @@ static void test_invoke_large_request(grpc_end2end_test_config config,
 
   grpc_arg args[2];
   args[0].type = GRPC_ARG_INTEGER;
-  args[0].key = GRPC_ARG_HTTP2_MAX_FRAME_SIZE;
+  args[0].key = const_cast<char *>(GRPC_ARG_HTTP2_MAX_FRAME_SIZE);
   args[0].value.integer = max_frame_size;
   args[1].type = GRPC_ARG_INTEGER;
-  args[1].key = GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES;
+  args[1].key = const_cast<char *>(GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES);
   args[1].value.integer = lookahead_bytes;
   grpc_channel_args channel_args = {GPR_ARRAY_SIZE(args), args};
 
diff --git a/test/core/end2end/tests/keepalive_timeout.c b/test/core/end2end/tests/keepalive_timeout.cc
index 0053368ecc..721c1364d0 100644
--- a/test/core/end2end/tests/keepalive_timeout.c
+++ b/test/core/end2end/tests/keepalive_timeout.cc
@@ -98,18 +98,19 @@ static void test_keepalive_timeout(grpc_end2end_test_config config) {
   grpc_byte_buffer *response_payload =
       grpc_raw_byte_buffer_create(&response_payload_slice, 1);
 
-  grpc_arg keepalive_arg_elems[] = {{.type = GRPC_ARG_INTEGER,
-                                     .key = GRPC_ARG_KEEPALIVE_TIME_MS,
-                                     .value.integer = 1500},
-                                    {.type = GRPC_ARG_INTEGER,
-                                     .key = GRPC_ARG_KEEPALIVE_TIMEOUT_MS,
-                                     .value.integer = 0},
-                                    {.type = GRPC_ARG_INTEGER,
-                                     .key = GRPC_ARG_HTTP2_BDP_PROBE,
-                                     .value.integer = 0}};
-  grpc_channel_args keepalive_args = {
-      .num_args = GPR_ARRAY_SIZE(keepalive_arg_elems),
-      .args = keepalive_arg_elems};
+  grpc_arg keepalive_arg_elems[3];
+  keepalive_arg_elems[0].type = GRPC_ARG_INTEGER;
+  keepalive_arg_elems[0].key = const_cast<char *>(GRPC_ARG_KEEPALIVE_TIME_MS);
+  keepalive_arg_elems[0].value.integer = 1500;
+  keepalive_arg_elems[1].type = GRPC_ARG_INTEGER;
+  keepalive_arg_elems[1].key =
+      const_cast<char *>(GRPC_ARG_KEEPALIVE_TIMEOUT_MS);
+  keepalive_arg_elems[1].value.integer = 0;
+  keepalive_arg_elems[2].type = GRPC_ARG_INTEGER;
+  keepalive_arg_elems[2].key = const_cast<char *>(GRPC_ARG_HTTP2_BDP_PROBE);
+  keepalive_arg_elems[2].value.integer = 0;
+  grpc_channel_args keepalive_args = {GPR_ARRAY_SIZE(keepalive_arg_elems),
+                                      keepalive_arg_elems};
 
   grpc_end2end_test_fixture f =
       begin_test(config, "keepalive_timeout", &keepalive_args, NULL);
diff --git a/test/core/end2end/tests/large_metadata.c b/test/core/end2end/tests/large_metadata.cc
index 81a45d827a..c2aa4d187b 100644
--- a/test/core/end2end/tests/large_metadata.c
+++ b/test/core/end2end/tests/large_metadata.cc
@@ -94,9 +94,10 @@ static void test_request_with_large_metadata(grpc_end2end_test_config config) {
       grpc_raw_byte_buffer_create(&request_payload_slice, 1);
   grpc_metadata meta;
   const size_t large_size = 64 * 1024;
-  grpc_arg arg = {GRPC_ARG_INTEGER,
-                  GRPC_ARG_MAX_METADATA_SIZE,
-                  {.integer = (int)large_size + 1024}};
+  grpc_arg arg;
+  arg.type = GRPC_ARG_INTEGER;
+  arg.key = const_cast<char *>(GRPC_ARG_MAX_METADATA_SIZE);
+  arg.value.integer = (int)large_size + 1024;
   grpc_channel_args args = {1, &arg};
   grpc_end2end_test_fixture f =
       begin_test(config, "test_request_with_large_metadata", &args, &args);
diff --git a/test/core/end2end/tests/load_reporting_hook.c b/test/core/end2end/tests/load_reporting_hook.cc
index 7b503790db..7b503790db 100644
--- a/test/core/end2end/tests/load_reporting_hook.c
+++ b/test/core/end2end/tests/load_reporting_hook.cc
diff --git a/test/core/end2end/tests/max_concurrent_streams.c b/test/core/end2end/tests/max_concurrent_streams.cc
index d18c13997c..deb44bbc3e 100644
--- a/test/core/end2end/tests/max_concurrent_streams.c
+++ b/test/core/end2end/tests/max_concurrent_streams.cc
@@ -221,7 +221,7 @@ static void test_max_concurrent_streams(grpc_end2end_test_config config) {
   int got_client_start;
   int got_server_start;
 
-  server_arg.key = GRPC_ARG_MAX_CONCURRENT_STREAMS;
+  server_arg.key = const_cast<char *>(GRPC_ARG_MAX_CONCURRENT_STREAMS);
   server_arg.type = GRPC_ARG_INTEGER;
   server_arg.value.integer = 1;
 
@@ -461,7 +461,7 @@ static void test_max_concurrent_streams_with_timeout_on_first(
   grpc_op *op;
   int was_cancelled;
 
-  server_arg.key = GRPC_ARG_MAX_CONCURRENT_STREAMS;
+  server_arg.key = const_cast<char *>(GRPC_ARG_MAX_CONCURRENT_STREAMS);
   server_arg.type = GRPC_ARG_INTEGER;
   server_arg.value.integer = 1;
 
@@ -655,7 +655,7 @@ static void test_max_concurrent_streams_with_timeout_on_second(
   grpc_op *op;
   int was_cancelled;
 
-  server_arg.key = GRPC_ARG_MAX_CONCURRENT_STREAMS;
+  server_arg.key = const_cast<char *>(GRPC_ARG_MAX_CONCURRENT_STREAMS);
   server_arg.type = GRPC_ARG_INTEGER;
   server_arg.value.integer = 1;
 
diff --git a/test/core/end2end/tests/max_connection_age.c b/test/core/end2end/tests/max_connection_age.cc
index b6daa59d7b..01cae9e3e0 100644
--- a/test/core/end2end/tests/max_connection_age.c
+++ b/test/core/end2end/tests/max_connection_age.cc
@@ -80,17 +80,17 @@ static void end_test(grpc_end2end_test_fixture *f) {
 static void test_max_age_forcibly_close(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = config.create_fixture(NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
-  grpc_arg server_a[] = {{.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_AGE_MS,
-                          .value.integer = MAX_CONNECTION_AGE_MS},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_AGE_GRACE_MS,
-                          .value.integer = MAX_CONNECTION_AGE_GRACE_MS},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_IDLE_MS,
-                          .value.integer = MAX_CONNECTION_IDLE_MS}};
-  grpc_channel_args server_args = {.num_args = GPR_ARRAY_SIZE(server_a),
-                                   .args = server_a};
+  grpc_arg server_a[3];
+  server_a[0].type = GRPC_ARG_INTEGER;
+  server_a[0].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_AGE_MS);
+  server_a[0].value.integer = MAX_CONNECTION_AGE_MS;
+  server_a[1].type = GRPC_ARG_INTEGER;
+  server_a[1].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_AGE_GRACE_MS);
+  server_a[1].value.integer = MAX_CONNECTION_AGE_GRACE_MS;
+  server_a[2].type = GRPC_ARG_INTEGER;
+  server_a[2].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_IDLE_MS);
+  server_a[2].value.integer = MAX_CONNECTION_IDLE_MS;
+  grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};
 
   config.init_client(&f, NULL);
   config.init_server(&f, &server_args);
@@ -223,17 +223,17 @@ static void test_max_age_forcibly_close(grpc_end2end_test_config config) {
 static void test_max_age_gracefully_close(grpc_end2end_test_config config) {
   grpc_end2end_test_fixture f = config.create_fixture(NULL, NULL);
   cq_verifier *cqv = cq_verifier_create(f.cq);
-  grpc_arg server_a[] = {{.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_AGE_MS,
-                          .value.integer = MAX_CONNECTION_AGE_MS},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_AGE_GRACE_MS,
-                          .value.integer = INT_MAX},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_IDLE_MS,
-                          .value.integer = MAX_CONNECTION_IDLE_MS}};
-  grpc_channel_args server_args = {.num_args = GPR_ARRAY_SIZE(server_a),
-                                   .args = server_a};
+  grpc_arg server_a[3];
+  server_a[0].type = GRPC_ARG_INTEGER;
+  server_a[0].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_AGE_MS);
+  server_a[0].value.integer = MAX_CONNECTION_AGE_MS;
+  server_a[1].type = GRPC_ARG_INTEGER;
+  server_a[1].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_AGE_GRACE_MS);
+  server_a[1].value.integer = INT_MAX;
+  server_a[2].type = GRPC_ARG_INTEGER;
+  server_a[2].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_IDLE_MS);
+  server_a[2].value.integer = MAX_CONNECTION_IDLE_MS;
+  grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};
 
   config.init_client(&f, NULL);
   config.init_server(&f, &server_args);
diff --git a/test/core/end2end/tests/max_connection_idle.c b/test/core/end2end/tests/max_connection_idle.cc
index f26b0be40e..a44d15452c 100644
--- a/test/core/end2end/tests/max_connection_idle.c
+++ b/test/core/end2end/tests/max_connection_idle.cc
@@ -171,19 +171,20 @@ static void test_max_connection_idle(grpc_end2end_test_config config) {
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
   cq_verifier *cqv = cq_verifier_create(f.cq);
 
-  grpc_arg client_a[] = {{.type = GRPC_ARG_INTEGER,
-                          .key = "grpc.testing.fixed_reconnect_backoff_ms",
-                          .value.integer = 1000}};
-  grpc_arg server_a[] = {{.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_IDLE_MS,
-                          .value.integer = MAX_CONNECTION_IDLE_MS},
-                         {.type = GRPC_ARG_INTEGER,
-                          .key = GRPC_ARG_MAX_CONNECTION_AGE_MS,
-                          .value.integer = MAX_CONNECTION_AGE_MS}};
-  grpc_channel_args client_args = {.num_args = GPR_ARRAY_SIZE(client_a),
-                                   .args = client_a};
-  grpc_channel_args server_args = {.num_args = GPR_ARRAY_SIZE(server_a),
-                                   .args = server_a};
+  grpc_arg client_a[1];
+  client_a[0].type = GRPC_ARG_INTEGER;
+  client_a[0].key =
+      const_cast<char *>("grpc.testing.fixed_reconnect_backoff_ms");
+  client_a[0].value.integer = 1000;
+  grpc_arg server_a[2];
+  server_a[0].type = GRPC_ARG_INTEGER;
+  server_a[0].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_IDLE_MS);
+  server_a[0].value.integer = MAX_CONNECTION_IDLE_MS;
+  server_a[1].type = GRPC_ARG_INTEGER;
+  server_a[1].key = const_cast<char *>(GRPC_ARG_MAX_CONNECTION_AGE_MS);
+  server_a[1].value.integer = MAX_CONNECTION_AGE_MS;
+  grpc_channel_args client_args = {GPR_ARRAY_SIZE(client_a), client_a};
+  grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};
 
   config.init_client(&f, &client_args);
   config.init_server(&f, &server_args);
diff --git a/test/core/end2end/tests/max_message_length.c b/test/core/end2end/tests/max_message_length.cc
index 01eb8d365e..2ee7b0be42 100644
--- a/test/core/end2end/tests/max_message_length.c
+++ b/test/core/end2end/tests/max_message_length.cc
@@ -132,31 +132,34 @@ static void test_max_message_length_on_request(grpc_end2end_test_config config,
     GPR_ASSERT(send_limit);
     grpc_arg arg;
     arg.type = GRPC_ARG_STRING;
-    arg.key = GRPC_ARG_SERVICE_CONFIG;
+    arg.key = const_cast<char *>(GRPC_ARG_SERVICE_CONFIG);
     arg.value.string =
         use_string_json_value
-            ? "{\n"
-              "  \"methodConfig\": [ {\n"
-              "    \"name\": [\n"
-              "      { \"service\": \"service\", \"method\": \"method\" }\n"
-              "    ],\n"
-              "    \"maxRequestMessageBytes\": \"5\"\n"
-              "  } ]\n"
-              "}"
-            : "{\n"
-              "  \"methodConfig\": [ {\n"
-              "    \"name\": [\n"
-              "      { \"service\": \"service\", \"method\": \"method\" }\n"
-              "    ],\n"
-              "    \"maxRequestMessageBytes\": 5\n"
-              "  } ]\n"
-              "}";
+            ? const_cast<char *>(
+                  "{\n"
+                  "  \"methodConfig\": [ {\n"
+                  "    \"name\": [\n"
+                  "      { \"service\": \"service\", \"method\": \"method\" }\n"
+                  "    ],\n"
+                  "    \"maxRequestMessageBytes\": \"5\"\n"
+                  "  } ]\n"
+                  "}")
+            : const_cast<char *>(
+                  "{\n"
+                  "  \"methodConfig\": [ {\n"
+                  "    \"name\": [\n"
+                  "      { \"service\": \"service\", \"method\": \"method\" }\n"
+                  "    ],\n"
+                  "    \"maxRequestMessageBytes\": 5\n"
+                  "  } ]\n"
+                  "}");
     client_args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
   } else {
     // Set limit via channel args.
     grpc_arg arg;
-    arg.key = send_limit ? GRPC_ARG_MAX_SEND_MESSAGE_LENGTH
-                         : GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH;
+    arg.key = send_limit
+                  ? const_cast<char *>(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH)
+                  : const_cast<char *>(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH);
     arg.type = GRPC_ARG_INTEGER;
     arg.value.integer = 5;
     grpc_channel_args *args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
@@ -322,8 +325,8 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
     GPR_ASSERT(!send_limit);
     grpc_arg arg;
     arg.type = GRPC_ARG_STRING;
-    arg.key = GRPC_ARG_SERVICE_CONFIG;
-    arg.value.string =
+    arg.key = const_cast<char *>(GRPC_ARG_SERVICE_CONFIG);
+    arg.value.string = const_cast<char *>(
         use_string_json_value
             ? "{\n"
               "  \"methodConfig\": [ {\n"
@@ -340,13 +343,14 @@ static void test_max_message_length_on_response(grpc_end2end_test_config config,
               "    ],\n"
               "    \"maxResponseMessageBytes\": 5\n"
               "  } ]\n"
-              "}";
+              "}");
     client_args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
   } else {
     // Set limit via channel args.
     grpc_arg arg;
-    arg.key = send_limit ? GRPC_ARG_MAX_SEND_MESSAGE_LENGTH
-                         : GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH;
+    arg.key = send_limit
+                  ? const_cast<char *>(GRPC_ARG_MAX_SEND_MESSAGE_LENGTH)
+                  : const_cast<char *>(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH);
     arg.type = GRPC_ARG_INTEGER;
     arg.value.integer = 5;
     grpc_channel_args *args = grpc_channel_args_copy_and_add(NULL, &arg, 1);
diff --git a/test/core/end2end/tests/negative_deadline.c b/test/core/end2end/tests/negative_deadline.cc
index c8667f4f4d..c8667f4f4d 100644
--- a/test/core/end2end/tests/negative_deadline.c
+++ b/test/core/end2end/tests/negative_deadline.cc
diff --git a/test/core/end2end/tests/network_status_change.c b/test/core/end2end/tests/network_status_change.cc
index 4d77174e22..4d77174e22 100644
--- a/test/core/end2end/tests/network_status_change.c
+++ b/test/core/end2end/tests/network_status_change.cc
diff --git a/test/core/end2end/tests/no_logging.c b/test/core/end2end/tests/no_logging.cc
index f7d50c24dd..d898ef0581 100644
--- a/test/core/end2end/tests/no_logging.c
+++ b/test/core/end2end/tests/no_logging.cc
@@ -36,7 +36,7 @@ enum { TIMEOUT = 200000 };
 
 static void *tag(intptr_t t) { return (void *)t; }
 
-extern void gpr_default_log(gpr_log_func_args *args);
+extern "C" void gpr_default_log(gpr_log_func_args *args);
 
 static void test_no_log(gpr_log_func_args *args) {
   char *message = NULL;
diff --git a/test/core/end2end/tests/no_op.c b/test/core/end2end/tests/no_op.cc
index 8400c27486..8400c27486 100644
--- a/test/core/end2end/tests/no_op.c
+++ b/test/core/end2end/tests/no_op.cc
diff --git a/test/core/end2end/tests/payload.c b/test/core/end2end/tests/payload.cc
index d98eed68e0..d98eed68e0 100644
--- a/test/core/end2end/tests/payload.c
+++ b/test/core/end2end/tests/payload.cc
diff --git a/test/core/end2end/tests/ping.c b/test/core/end2end/tests/ping.cc
index 23c82569ba..e6b0e55b01 100644
--- a/test/core/end2end/tests/ping.c
+++ b/test/core/end2end/tests/ping.cc
@@ -37,27 +37,27 @@ static void test_ping(grpc_end2end_test_config config,
   grpc_connectivity_state state = GRPC_CHANNEL_IDLE;
   int i;
 
-  grpc_arg client_a[] = {
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS,
-       .value.integer = 10},
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA,
-       .value.integer = 0},
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS,
-       .value.integer = 1}};
-  grpc_arg server_a[] = {
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS,
-       .value.integer = 0},
-      {.type = GRPC_ARG_INTEGER,
-       .key = GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS,
-       .value.integer = 1}};
-  grpc_channel_args client_args = {.num_args = GPR_ARRAY_SIZE(client_a),
-                                   .args = client_a};
-  grpc_channel_args server_args = {.num_args = GPR_ARRAY_SIZE(server_a),
-                                   .args = server_a};
+  grpc_arg client_a[3];
+  client_a[0].type = GRPC_ARG_INTEGER;
+  client_a[0].key =
+      const_cast<char *>(GRPC_ARG_HTTP2_MIN_SENT_PING_INTERVAL_WITHOUT_DATA_MS);
+  client_a[0].value.integer = 10;
+  client_a[1].type = GRPC_ARG_INTEGER;
+  client_a[1].key = const_cast<char *>(GRPC_ARG_HTTP2_MAX_PINGS_WITHOUT_DATA);
+  client_a[1].value.integer = 0;
+  client_a[2].type = GRPC_ARG_INTEGER;
+  client_a[2].key = const_cast<char *>(GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS);
+  client_a[2].value.integer = 1;
+  grpc_arg server_a[2];
+  server_a[0].type = GRPC_ARG_INTEGER;
+  server_a[0].key =
+      const_cast<char *>(GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS);
+  server_a[0].value.integer = 0;
+  server_a[1].type = GRPC_ARG_INTEGER;
+  server_a[1].key = const_cast<char *>(GRPC_ARG_KEEPALIVE_PERMIT_WITHOUT_CALLS);
+  server_a[1].value.integer = 1;
+  grpc_channel_args client_args = {GPR_ARRAY_SIZE(client_a), client_a};
+  grpc_channel_args server_args = {GPR_ARRAY_SIZE(server_a), server_a};
 
   config.init_client(&f, &client_args);
   config.init_server(&f, &server_args);
diff --git a/test/core/end2end/tests/ping_pong_streaming.c b/test/core/end2end/tests/ping_pong_streaming.cc
index 1c44262c3d..1c44262c3d 100644
--- a/test/core/end2end/tests/ping_pong_streaming.c
+++ b/test/core/end2end/tests/ping_pong_streaming.cc
diff --git a/test/core/end2end/tests/proxy_auth.c b/test/core/end2end/tests/proxy_auth.cc
index d922049bcb..fe87399f03 100644
--- a/test/core/end2end/tests/proxy_auth.c
+++ b/test/core/end2end/tests/proxy_auth.cc
@@ -217,10 +217,11 @@ static void simple_request_body(grpc_end2end_test_config config,
 
 static void test_invoke_proxy_auth(grpc_end2end_test_config config) {
   /* Indicate that the proxy requires user auth */
-  grpc_arg client_arg = {.type = GRPC_ARG_STRING,
-                         .key = GRPC_ARG_HTTP_PROXY_AUTH_CREDS,
-                         .value.string = GRPC_TEST_HTTP_PROXY_AUTH_CREDS};
-  grpc_channel_args client_args = {.num_args = 1, .args = &client_arg};
+  grpc_arg client_arg;
+  client_arg.type = GRPC_ARG_STRING;
+  client_arg.key = const_cast<char *>(GRPC_ARG_HTTP_PROXY_AUTH_CREDS);
+  client_arg.value.string = const_cast<char *>(GRPC_TEST_HTTP_PROXY_AUTH_CREDS);
+  grpc_channel_args client_args = {1, &client_arg};
   grpc_end2end_test_fixture f =
       begin_test(config, "test_invoke_proxy_auth", &client_args, NULL);
   simple_request_body(config, f);
diff --git a/test/core/end2end/tests/registered_call.c b/test/core/end2end/tests/registered_call.cc
index 4598029818..4598029818 100644
--- a/test/core/end2end/tests/registered_call.c
+++ b/test/core/end2end/tests/registered_call.cc
diff --git a/test/core/end2end/tests/request_with_flags.c b/test/core/end2end/tests/request_with_flags.cc
index dfb7d58743..dfb7d58743 100644
--- a/test/core/end2end/tests/request_with_flags.c
+++ b/test/core/end2end/tests/request_with_flags.cc
diff --git a/test/core/end2end/tests/request_with_payload.c b/test/core/end2end/tests/request_with_payload.cc
index 575e54c7d9..575e54c7d9 100644
--- a/test/core/end2end/tests/request_with_payload.c
+++ b/test/core/end2end/tests/request_with_payload.cc
diff --git a/test/core/end2end/tests/resource_quota_server.c b/test/core/end2end/tests/resource_quota_server.cc
index 93befeee0c..e710e39e1d 100644
--- a/test/core/end2end/tests/resource_quota_server.c
+++ b/test/core/end2end/tests/resource_quota_server.cc
@@ -117,7 +117,7 @@ void resource_quota_server(grpc_end2end_test_config config) {
 #define SERVER_END_BASE_TAG 0x4000
 
   grpc_arg arg;
-  arg.key = GRPC_ARG_RESOURCE_QUOTA;
+  arg.key = const_cast<char *>(GRPC_ARG_RESOURCE_QUOTA);
   arg.type = GRPC_ARG_POINTER;
   arg.value.pointer.p = resource_quota;
   arg.value.pointer.vtable = grpc_resource_quota_arg_vtable();
diff --git a/test/core/end2end/tests/server_finishes_request.c b/test/core/end2end/tests/server_finishes_request.cc
index 49b9f27396..49b9f27396 100644
--- a/test/core/end2end/tests/server_finishes_request.c
+++ b/test/core/end2end/tests/server_finishes_request.cc
diff --git a/test/core/end2end/tests/shutdown_finishes_calls.c b/test/core/end2end/tests/shutdown_finishes_calls.cc
index f90359f09a..f90359f09a 100644
--- a/test/core/end2end/tests/shutdown_finishes_calls.c
+++ b/test/core/end2end/tests/shutdown_finishes_calls.cc
diff --git a/test/core/end2end/tests/shutdown_finishes_tags.c b/test/core/end2end/tests/shutdown_finishes_tags.cc
index 7914cc95ba..7914cc95ba 100644
--- a/test/core/end2end/tests/shutdown_finishes_tags.c
+++ b/test/core/end2end/tests/shutdown_finishes_tags.cc
diff --git a/test/core/end2end/tests/simple_cacheable_request.c b/test/core/end2end/tests/simple_cacheable_request.cc
index faa5c193dc..faa5c193dc 100644
--- a/test/core/end2end/tests/simple_cacheable_request.c
+++ b/test/core/end2end/tests/simple_cacheable_request.cc
diff --git a/test/core/end2end/tests/simple_delayed_request.c b/test/core/end2end/tests/simple_delayed_request.cc
index c3f66a07aa..a4cbcbfedf 100644
--- a/test/core/end2end/tests/simple_delayed_request.c
+++ b/test/core/end2end/tests/simple_delayed_request.cc
@@ -191,7 +191,8 @@ static void test_simple_delayed_request_short(grpc_end2end_test_config config) {
   grpc_channel_args client_args;
   grpc_arg arg_array[1];
   arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+  arg_array[0].key =
+      const_cast<char *>("grpc.testing.fixed_reconnect_backoff_ms");
   arg_array[0].value.integer = 1000;
   client_args.args = arg_array;
   client_args.num_args = 1;
@@ -210,7 +211,8 @@ static void test_simple_delayed_request_long(grpc_end2end_test_config config) {
   grpc_channel_args client_args;
   grpc_arg arg_array[1];
   arg_array[0].type = GRPC_ARG_INTEGER;
-  arg_array[0].key = "grpc.testing.fixed_reconnect_backoff_ms";
+  arg_array[0].key =
+      const_cast<char *>("grpc.testing.fixed_reconnect_backoff_ms");
   arg_array[0].value.integer = 1000;
   client_args.args = arg_array;
   client_args.num_args = 1;
diff --git a/test/core/end2end/tests/simple_metadata.c b/test/core/end2end/tests/simple_metadata.cc
index 17e7f696e2..17e7f696e2 100644
--- a/test/core/end2end/tests/simple_metadata.c
+++ b/test/core/end2end/tests/simple_metadata.cc
diff --git a/test/core/end2end/tests/simple_request.c b/test/core/end2end/tests/simple_request.cc
index 7ce7e1f285..48c9824894 100644
--- a/test/core/end2end/tests/simple_request.c
+++ b/test/core/end2end/tests/simple_request.cc
@@ -103,8 +103,10 @@ static void simple_request_body(grpc_end2end_test_config config,
   grpc_slice details;
   int was_cancelled = 2;
   char *peer;
-  grpc_stats_data *before = gpr_malloc(sizeof(grpc_stats_data));
-  grpc_stats_data *after = gpr_malloc(sizeof(grpc_stats_data));
+  grpc_stats_data *before =
+      static_cast<grpc_stats_data *>(gpr_malloc(sizeof(grpc_stats_data)));
+  grpc_stats_data *after =
+      static_cast<grpc_stats_data *>(gpr_malloc(sizeof(grpc_stats_data)));
 
   grpc_stats_collect(before);
 
diff --git a/test/core/end2end/tests/stream_compression_compressed_payload.c b/test/core/end2end/tests/stream_compression_compressed_payload.cc
index 8b47741cd4..8b47741cd4 100644
--- a/test/core/end2end/tests/stream_compression_compressed_payload.c
+++ b/test/core/end2end/tests/stream_compression_compressed_payload.cc
diff --git a/test/core/end2end/tests/stream_compression_payload.c b/test/core/end2end/tests/stream_compression_payload.cc
index e47d2aa93c..e47d2aa93c 100644
--- a/test/core/end2end/tests/stream_compression_payload.c
+++ b/test/core/end2end/tests/stream_compression_payload.cc
diff --git a/test/core/end2end/tests/stream_compression_ping_pong_streaming.c b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
index 4c1a34cc64..4c1a34cc64 100644
--- a/test/core/end2end/tests/stream_compression_ping_pong_streaming.c
+++ b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
diff --git a/test/core/end2end/tests/streaming_error_response.c b/test/core/end2end/tests/streaming_error_response.cc
index 8891b8674c..8891b8674c 100644
--- a/test/core/end2end/tests/streaming_error_response.c
+++ b/test/core/end2end/tests/streaming_error_response.cc
diff --git a/test/core/end2end/tests/trailing_metadata.c b/test/core/end2end/tests/trailing_metadata.cc
index 7aa78a04b8..7aa78a04b8 100644
--- a/test/core/end2end/tests/trailing_metadata.c
+++ b/test/core/end2end/tests/trailing_metadata.cc
diff --git a/test/core/end2end/tests/workaround_cronet_compression.c b/test/core/end2end/tests/workaround_cronet_compression.cc
index 44e8e04643..17e59ad6d4 100644
--- a/test/core/end2end/tests/workaround_cronet_compression.c
+++ b/test/core/end2end/tests/workaround_cronet_compression.cc
@@ -145,7 +145,7 @@ static void request_with_payload_template(
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     grpc_channel_args *client_args_old = client_args;
     grpc_arg arg;
-    arg.key = GRPC_ARG_PRIMARY_USER_AGENT_STRING;
+    arg.key = const_cast<char *>(GRPC_ARG_PRIMARY_USER_AGENT_STRING);
     arg.type = GRPC_ARG_STRING;
     arg.value.string = user_agent_override;
     client_args = grpc_channel_args_copy_and_add(client_args_old, &arg, 1);
@@ -366,11 +366,14 @@ typedef struct workaround_cronet_compression_config {
 
 static workaround_cronet_compression_config workaround_configs[] = {
     {NULL, GRPC_COMPRESS_GZIP},
-    {"grpc-objc/1.3.0-dev grpc-c/3.0.0-dev (ios; cronet_http; gentle)",
+    {const_cast<char *>(
+         "grpc-objc/1.3.0-dev grpc-c/3.0.0-dev (ios; cronet_http; gentle)"),
      GRPC_COMPRESS_NONE},
-    {"grpc-objc/1.3.0-dev grpc-c/3.0.0-dev (ios; chttp2; gentle)",
+    {const_cast<char *>(
+         "grpc-objc/1.3.0-dev grpc-c/3.0.0-dev (ios; chttp2; gentle)"),
      GRPC_COMPRESS_GZIP},
-    {"grpc-objc/1.4.0 grpc-c/3.0.0-dev (ios; cronet_http; gentle)",
+    {const_cast<char *>(
+         "grpc-objc/1.4.0 grpc-c/3.0.0-dev (ios; cronet_http; gentle)"),
      GRPC_COMPRESS_GZIP}};
 static const size_t workaround_configs_num =
     sizeof(workaround_configs) / sizeof(*workaround_configs);
diff --git a/test/core/end2end/tests/write_buffering.c b/test/core/end2end/tests/write_buffering.cc
index d7d1e5fa3d..d7d1e5fa3d 100644
--- a/test/core/end2end/tests/write_buffering.c
+++ b/test/core/end2end/tests/write_buffering.cc
diff --git a/test/core/end2end/tests/write_buffering_at_end.c b/test/core/end2end/tests/write_buffering_at_end.cc
index 6113843390..6113843390 100644
--- a/test/core/end2end/tests/write_buffering_at_end.c
+++ b/test/core/end2end/tests/write_buffering_at_end.cc
diff --git a/test/core/fling/client.c b/test/core/fling/client.cc
index be7bfc2280..356ec4bb28 100644
--- a/test/core/fling/client.c
+++ b/test/core/fling/client.cc
@@ -151,10 +151,10 @@ int main(int argc, char **argv) {
 
   int payload_size = 1;
   int secure = 0;
-  char *target = "localhost:443";
+  const char *target = "localhost:443";
   gpr_cmdline *cl;
   grpc_event event;
-  char *scenario_name = "ping-pong-request";
+  const char *scenario_name = "ping-pong-request";
   scenario sc = {NULL, NULL, NULL};
 
   gpr_timers_set_log_filename("latency_trace.fling_client.txt");
diff --git a/test/core/fling/fling_test.c b/test/core/fling/fling_stream_test.cc
index 90b48e7737..4e3b63e192 100644
--- a/test/core/fling/fling_test.c
+++ b/test/core/fling/fling_stream_test.cc
@@ -44,9 +44,9 @@ int main(int argc, char **argv) {
   /* start the server */
   gpr_asprintf(&args[0], "%s/fling_server%s", root,
                gpr_subprocess_binary_extension());
-  args[1] = "--bind";
+  args[1] = const_cast<char *>("--bind");
   gpr_join_host_port(&args[2], "::", port);
-  args[3] = "--no-secure";
+  args[3] = const_cast<char *>("--no-secure");
   svr = gpr_subprocess_create(4, (const char **)args);
   gpr_free(args[0]);
   gpr_free(args[2]);
@@ -54,10 +54,10 @@ int main(int argc, char **argv) {
   /* start the client */
   gpr_asprintf(&args[0], "%s/fling_client%s", root,
                gpr_subprocess_binary_extension());
-  args[1] = "--target";
+  args[1] = const_cast<char *>("--target");
   gpr_join_host_port(&args[2], "127.0.0.1", port);
-  args[3] = "--scenario=ping-pong-request";
-  args[4] = "--no-secure";
+  args[3] = const_cast<char *>("--scenario=ping-pong-stream");
+  args[4] = const_cast<char *>("--no-secure");
   args[5] = 0;
   cli = gpr_subprocess_create(6, (const char **)args);
   gpr_free(args[0]);
diff --git a/test/core/fling/fling_stream_test.c b/test/core/fling/fling_test.cc
index 566d9ae6f0..a7681d572a 100644
--- a/test/core/fling/fling_stream_test.c
+++ b/test/core/fling/fling_test.cc
@@ -26,9 +26,9 @@
 #include "src/core/lib/support/string.h"
 #include "test/core/util/port.h"
 
-int main(int argc, char **argv) {
-  char *me = argv[0];
-  char *lslash = strrchr(me, '/');
+int main(int argc, const char **argv) {
+  const char *me = argv[0];
+  const char *lslash = strrchr(me, '/');
   char root[1024];
   int port = grpc_pick_unused_port_or_die();
   char *args[10];
@@ -44,9 +44,9 @@ int main(int argc, char **argv) {
   /* start the server */
   gpr_asprintf(&args[0], "%s/fling_server%s", root,
                gpr_subprocess_binary_extension());
-  args[1] = "--bind";
+  args[1] = const_cast<char *>("--bind");
   gpr_join_host_port(&args[2], "::", port);
-  args[3] = "--no-secure";
+  args[3] = const_cast<char *>("--no-secure");
   svr = gpr_subprocess_create(4, (const char **)args);
   gpr_free(args[0]);
   gpr_free(args[2]);
@@ -54,10 +54,10 @@ int main(int argc, char **argv) {
   /* start the client */
   gpr_asprintf(&args[0], "%s/fling_client%s", root,
                gpr_subprocess_binary_extension());
-  args[1] = "--target";
+  args[1] = const_cast<char *>("--target");
   gpr_join_host_port(&args[2], "127.0.0.1", port);
-  args[3] = "--scenario=ping-pong-stream";
-  args[4] = "--no-secure";
+  args[3] = const_cast<char *>("--scenario=ping-pong-request");
+  args[4] = const_cast<char *>("--no-secure");
   args[5] = 0;
   cli = gpr_subprocess_create(6, (const char **)args);
   gpr_free(args[0]);
diff --git a/test/core/fling/server.c b/test/core/fling/server.cc
index b3a7fa21ec..34e5f79f0b 100644
--- a/test/core/fling/server.c
+++ b/test/core/fling/server.cc
@@ -177,7 +177,7 @@ int main(int argc, char **argv) {
   int shutdown_finished = 0;
 
   int secure = 0;
-  char *addr = NULL;
+  const char *addr = NULL;
 
   char *fake_argv[1];
 
@@ -247,7 +247,7 @@ int main(int argc, char **argv) {
         cq, gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                          gpr_time_from_micros(1000000, GPR_TIMESPAN)),
         NULL);
-    s = ev.tag;
+    s = static_cast<call_state *>(ev.tag);
     switch (ev.type) {
       case GRPC_OP_COMPLETE:
         switch ((intptr_t)s) {
diff --git a/test/core/handshake/client_ssl.c b/test/core/handshake/client_ssl.cc
index de660fe1c4..f501948b96 100644
--- a/test/core/handshake/client_ssl.c
+++ b/test/core/handshake/client_ssl.cc
@@ -230,8 +230,7 @@ static bool client_ssl_test(char *server_alpn_preferred) {
   gpr_thd_options thdopt = gpr_thd_options_default();
   gpr_thd_id thdid;
   gpr_thd_options_set_joinable(&thdopt);
-  server_args args = {.socket = server_socket,
-                      .alpn_preferred = server_alpn_preferred};
+  server_args args = {server_socket, server_alpn_preferred};
   GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &args, &thdopt));
 
   // Load key pair and establish client SSL credentials.
@@ -253,9 +252,10 @@ static bool client_ssl_test(char *server_alpn_preferred) {
   // lazy, this won't necessarily establish a connection yet.
   char *target;
   gpr_asprintf(&target, "127.0.0.1:%d", port);
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args grpc_args;
   grpc_args.num_args = 1;
   grpc_args.args = &ssl_name_override;
@@ -305,14 +305,14 @@ static bool client_ssl_test(char *server_alpn_preferred) {
 
 int main(int argc, char *argv[]) {
   // Handshake succeeeds when the server has grpc-exp as the ALPN preference.
-  GPR_ASSERT(client_ssl_test("grpc-exp"));
+  GPR_ASSERT(client_ssl_test(const_cast<char *>("grpc-exp")));
   // Handshake succeeeds when the server has h2 as the ALPN preference. This
   // covers legacy gRPC servers which don't support grpc-exp.
-  GPR_ASSERT(client_ssl_test("h2"));
+  GPR_ASSERT(client_ssl_test(const_cast<char *>("h2")));
   // Handshake fails when the server uses a fake protocol as its ALPN
   // preference. This validates the client is correctly validating ALPN returns
   // and sanity checks the client_ssl_test.
-  GPR_ASSERT(!client_ssl_test("foo"));
+  GPR_ASSERT(!client_ssl_test(const_cast<char *>("foo")));
   return 0;
 }
 
diff --git a/test/core/handshake/server_ssl.c b/test/core/handshake/server_ssl.cc
index 85a8b4de41..7b24459688 100644
--- a/test/core/handshake/server_ssl.c
+++ b/test/core/handshake/server_ssl.cc
@@ -175,7 +175,8 @@ static bool server_ssl_test(const char *alpn_list[], unsigned int alpn_list_len,
   for (unsigned int i = 0; i < alpn_list_len; ++i) {
     alpn_protos_len += (unsigned int)strlen(alpn_list[i]);
   }
-  unsigned char *alpn_protos = gpr_malloc(alpn_protos_len);
+  unsigned char *alpn_protos =
+      static_cast<unsigned char *>(gpr_malloc(alpn_protos_len));
   unsigned char *p = alpn_protos;
   for (unsigned int i = 0; i < alpn_list_len; ++i) {
     const uint8_t len = (uint8_t)strlen(alpn_list[i]);
diff --git a/test/core/http/format_request_test.c b/test/core/http/format_request_test.cc
index 0279a1b5e3..b2d903458d 100644
--- a/test/core/http/format_request_test.c
+++ b/test/core/http/format_request_test.cc
@@ -24,13 +24,14 @@
 #include "test/core/util/test_config.h"
 
 static void test_format_get_request(void) {
-  grpc_http_header hdr = {"x-yz", "abc"};
+  grpc_http_header hdr = {const_cast<char *>("x-yz"),
+                          const_cast<char *>("abc")};
   grpc_httpcli_request req;
   grpc_slice slice;
 
   memset(&req, 0, sizeof(req));
-  req.host = "example.com";
-  req.http.path = "/index.html";
+  req.host = const_cast<char *>("example.com");
+  req.http.path = const_cast<char *>("/index.html");
   req.http.hdr_count = 1;
   req.http.hdrs = &hdr;
 
@@ -49,15 +50,16 @@ static void test_format_get_request(void) {
 }
 
 static void test_format_post_request(void) {
-  grpc_http_header hdr = {"x-yz", "abc"};
+  grpc_http_header hdr = {const_cast<char *>("x-yz"),
+                          const_cast<char *>("abc")};
   grpc_httpcli_request req;
   grpc_slice slice;
   char body_bytes[] = "fake body";
   size_t body_len = 9;
 
   memset(&req, 0, sizeof(req));
-  req.host = "example.com";
-  req.http.path = "/index.html";
+  req.host = const_cast<char *>("example.com");
+  req.http.path = const_cast<char *>("/index.html");
   req.http.hdr_count = 1;
   req.http.hdrs = &hdr;
 
@@ -79,13 +81,14 @@ static void test_format_post_request(void) {
 }
 
 static void test_format_post_request_no_body(void) {
-  grpc_http_header hdr = {"x-yz", "abc"};
+  grpc_http_header hdr = {const_cast<char *>("x-yz"),
+                          const_cast<char *>("abc")};
   grpc_httpcli_request req;
   grpc_slice slice;
 
   memset(&req, 0, sizeof(req));
-  req.host = "example.com";
-  req.http.path = "/index.html";
+  req.host = const_cast<char *>("example.com");
+  req.http.path = const_cast<char *>("/index.html");
   req.http.hdr_count = 1;
   req.http.hdrs = &hdr;
 
@@ -110,13 +113,13 @@ static void test_format_post_request_content_type_override(void) {
   char body_bytes[] = "fake%20body";
   size_t body_len = 11;
 
-  hdrs[0].key = "x-yz";
-  hdrs[0].value = "abc";
-  hdrs[1].key = "Content-Type";
-  hdrs[1].value = "application/x-www-form-urlencoded";
+  hdrs[0].key = const_cast<char *>("x-yz");
+  hdrs[0].value = const_cast<char *>("abc");
+  hdrs[1].key = const_cast<char *>("Content-Type");
+  hdrs[1].value = const_cast<char *>("application/x-www-form-urlencoded");
   memset(&req, 0, sizeof(req));
-  req.host = "example.com";
-  req.http.path = "/index.html";
+  req.host = const_cast<char *>("example.com");
+  req.http.path = const_cast<char *>("/index.html");
   req.http.hdr_count = 2;
   req.http.hdrs = hdrs;
 
diff --git a/test/core/http/httpcli_test.c b/test/core/http/httpcli_test.cc
index cc1c16d695..925f63decc 100644
--- a/test/core/http/httpcli_test.c
+++ b/test/core/http/httpcli_test.cc
@@ -44,7 +44,7 @@ static void on_finish(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   const char *expect =
       "<html><head><title>Hello world!</title></head>"
       "<body><p>This is a test</p></body></html>";
-  grpc_http_response *response = arg;
+  grpc_http_response *response = static_cast<grpc_http_response *>(arg);
   GPR_ASSERT(response);
   GPR_ASSERT(response->status == 200);
   GPR_ASSERT(response->body_length == strlen(expect));
@@ -70,7 +70,7 @@ static void test_get(int port) {
 
   memset(&req, 0, sizeof(req));
   req.host = host;
-  req.http.path = "/get";
+  req.http.path = const_cast<char *>("/get");
   req.handshaker = &grpc_httpcli_plaintext;
 
   grpc_http_response response;
@@ -110,7 +110,7 @@ static void test_post(int port) {
 
   memset(&req, 0, sizeof(req));
   req.host = host;
-  req.http.path = "/post";
+  req.http.path = const_cast<char *>("/post");
   req.handshaker = &grpc_httpcli_plaintext;
 
   grpc_http_response response;
@@ -139,7 +139,8 @@ static void test_post(int port) {
 }
 
 static void destroy_pops(grpc_exec_ctx *exec_ctx, void *p, grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(p));
+  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(
+                                     static_cast<grpc_polling_entity *>(p)));
 }
 
 int main(int argc, char **argv) {
@@ -154,7 +155,7 @@ int main(int argc, char **argv) {
   /* figure out where we are */
   char *root;
   if (lslash) {
-    root = gpr_malloc((size_t)(lslash - me + 1));
+    root = static_cast<char *>(gpr_malloc((size_t)(lslash - me + 1)));
     memcpy(root, me, (size_t)(lslash - me));
     root[lslash - me] = 0;
   } else {
@@ -171,7 +172,7 @@ int main(int argc, char **argv) {
   }
 
   /* start the server */
-  args[1 + arg_shift] = "--port";
+  args[1 + arg_shift] = const_cast<char *>("--port");
   gpr_asprintf(&args[2 + arg_shift], "%d", port);
   server = gpr_subprocess_create(3 + arg_shift, (const char **)args);
   GPR_ASSERT(server);
@@ -186,7 +187,8 @@ int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   grpc_init();
   grpc_httpcli_context_init(&g_context);
-  grpc_pollset *pollset = gpr_zalloc(grpc_pollset_size());
+  grpc_pollset *pollset =
+      static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(pollset, &g_mu);
   g_pops = grpc_polling_entity_create_from_pollset(pollset);
 
diff --git a/test/core/http/httpscli_test.c b/test/core/http/httpscli_test.cc
index f8a3cfdd76..179b3a720b 100644
--- a/test/core/http/httpscli_test.c
+++ b/test/core/http/httpscli_test.cc
@@ -44,7 +44,7 @@ static void on_finish(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
   const char *expect =
       "<html><head><title>Hello world!</title></head>"
       "<body><p>This is a test</p></body></html>";
-  grpc_http_response *response = arg;
+  grpc_http_response *response = static_cast<grpc_http_response *>(arg);
   GPR_ASSERT(response);
   GPR_ASSERT(response->status == 200);
   GPR_ASSERT(response->body_length == strlen(expect));
@@ -70,8 +70,8 @@ static void test_get(int port) {
 
   memset(&req, 0, sizeof(req));
   req.host = host;
-  req.ssl_host_override = "foo.test.google.fr";
-  req.http.path = "/get";
+  req.ssl_host_override = const_cast<char *>("foo.test.google.fr");
+  req.http.path = const_cast<char *>("/get");
   req.handshaker = &grpc_httpcli_ssl;
 
   grpc_http_response response;
@@ -111,8 +111,8 @@ static void test_post(int port) {
 
   memset(&req, 0, sizeof(req));
   req.host = host;
-  req.ssl_host_override = "foo.test.google.fr";
-  req.http.path = "/post";
+  req.ssl_host_override = const_cast<char *>("foo.test.google.fr");
+  req.http.path = const_cast<char *>("/post");
   req.handshaker = &grpc_httpcli_ssl;
 
   grpc_http_response response;
@@ -141,7 +141,8 @@ static void test_post(int port) {
 }
 
 static void destroy_pops(grpc_exec_ctx *exec_ctx, void *p, grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(p));
+  grpc_pollset_destroy(exec_ctx, grpc_polling_entity_pollset(
+                                     static_cast<grpc_polling_entity *>(p)));
 }
 
 int main(int argc, char **argv) {
@@ -156,7 +157,7 @@ int main(int argc, char **argv) {
   /* figure out where we are */
   char *root;
   if (lslash) {
-    root = gpr_malloc((size_t)(lslash - me + 1));
+    root = static_cast<char *>(gpr_malloc((size_t)(lslash - me + 1)));
     memcpy(root, me, (size_t)(lslash - me));
     root[lslash - me] = 0;
   } else {
@@ -173,9 +174,9 @@ int main(int argc, char **argv) {
   }
 
   /* start the server */
-  args[1 + arg_shift] = "--port";
+  args[1 + arg_shift] = const_cast<char *>("--port");
   gpr_asprintf(&args[2 + arg_shift], "%d", port);
-  args[3 + arg_shift] = "--ssl";
+  args[3 + arg_shift] = const_cast<char *>("--ssl");
   server = gpr_subprocess_create(4 + arg_shift, (const char **)args);
   GPR_ASSERT(server);
   gpr_free(args[0]);
@@ -189,7 +190,8 @@ int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   grpc_init();
   grpc_httpcli_context_init(&g_context);
-  grpc_pollset *pollset = gpr_zalloc(grpc_pollset_size());
+  grpc_pollset *pollset =
+      static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(pollset, &g_mu);
   g_pops = grpc_polling_entity_create_from_pollset(pollset);
 
diff --git a/test/core/http/parser_test.c b/test/core/http/parser_test.cc
index a7044c03bc..9eff49122c 100644
--- a/test/core/http/parser_test.c
+++ b/test/core/http/parser_test.cc
@@ -29,9 +29,11 @@
 #include "test/core/util/test_config.h"
 
 static void test_request_succeeds(grpc_slice_split_mode split_mode,
-                                  char *request_text, char *expect_method,
+                                  const char *request_text,
+                                  const char *expect_method,
                                   grpc_http_version expect_version,
-                                  char *expect_path, char *expect_body, ...) {
+                                  const char *expect_path,
+                                  const char *expect_body, ...) {
   grpc_http_parser parser;
   grpc_slice input_slice = grpc_slice_from_copied_string(request_text);
   size_t num_slices;
@@ -87,8 +89,9 @@ static void test_request_succeeds(grpc_slice_split_mode split_mode,
   gpr_free(slices);
 }
 
-static void test_succeeds(grpc_slice_split_mode split_mode, char *response_text,
-                          int expect_status, char *expect_body, ...) {
+static void test_succeeds(grpc_slice_split_mode split_mode,
+                          const char *response_text, int expect_status,
+                          const char *expect_body, ...) {
   grpc_http_parser parser;
   grpc_slice input_slice = grpc_slice_from_copied_string(response_text);
   size_t num_slices;
@@ -141,7 +144,8 @@ static void test_succeeds(grpc_slice_split_mode split_mode, char *response_text,
   gpr_free(slices);
 }
 
-static void test_fails(grpc_slice_split_mode split_mode, char *response_text) {
+static void test_fails(grpc_slice_split_mode split_mode,
+                       const char *response_text) {
   grpc_http_parser parser;
   grpc_slice input_slice = grpc_slice_from_copied_string(response_text);
   size_t num_slices;
@@ -174,7 +178,7 @@ static void test_fails(grpc_slice_split_mode split_mode, char *response_text) {
 }
 
 static void test_request_fails(grpc_slice_split_mode split_mode,
-                               char *request_text) {
+                               const char *request_text) {
   grpc_http_parser parser;
   grpc_slice input_slice = grpc_slice_from_copied_string(request_text);
   size_t num_slices;
@@ -286,7 +290,8 @@ int main(int argc, char **argv) {
     test_request_fails(split_modes[i], "GET / HTTP/1.2\r\n");
     test_request_fails(split_modes[i], "GET / HTTP/1.0\n");
 
-    tmp1 = gpr_malloc(2 * GRPC_HTTP_PARSER_MAX_HEADER_LENGTH);
+    tmp1 =
+        static_cast<char *>(gpr_malloc(2 * GRPC_HTTP_PARSER_MAX_HEADER_LENGTH));
     memset(tmp1, 'a', 2 * GRPC_HTTP_PARSER_MAX_HEADER_LENGTH - 1);
     tmp1[2 * GRPC_HTTP_PARSER_MAX_HEADER_LENGTH - 1] = 0;
     gpr_asprintf(&tmp2, "HTTP/1.0 200 OK\r\nxyz: %s\r\n\r\n", tmp1);
diff --git a/test/core/http/request_fuzzer.c b/test/core/http/request_fuzzer.cc
index aefe9eb0f9..aefe9eb0f9 100644
--- a/test/core/http/request_fuzzer.c
+++ b/test/core/http/request_fuzzer.cc
diff --git a/test/core/http/response_fuzzer.c b/test/core/http/response_fuzzer.cc
index d5bb67500d..d5bb67500d 100644
--- a/test/core/http/response_fuzzer.c
+++ b/test/core/http/response_fuzzer.cc
diff --git a/test/core/iomgr/combiner_test.c b/test/core/iomgr/combiner_test.cc
index 38f512de0e..7d2d098d2b 100644
--- a/test/core/iomgr/combiner_test.c
+++ b/test/core/iomgr/combiner_test.cc
@@ -35,7 +35,7 @@ static void test_no_op(void) {
 
 static void set_event_to_true(grpc_exec_ctx *exec_ctx, void *value,
                               grpc_error *error) {
-  gpr_event_set(value, (void *)1);
+  gpr_event_set(static_cast<gpr_event *>(value), (void *)1);
 }
 
 static void test_execute_one(void) {
@@ -68,19 +68,19 @@ typedef struct {
 } ex_args;
 
 static void check_one(grpc_exec_ctx *exec_ctx, void *a, grpc_error *error) {
-  ex_args *args = a;
+  ex_args *args = static_cast<ex_args *>(a);
   GPR_ASSERT(*args->ctr == args->value - 1);
   *args->ctr = args->value;
   gpr_free(a);
 }
 
 static void execute_many_loop(void *a) {
-  thd_args *args = a;
+  thd_args *args = static_cast<thd_args *>(a);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   size_t n = 1;
   for (size_t i = 0; i < 10; i++) {
     for (size_t j = 0; j < 10000; j++) {
-      ex_args *c = gpr_malloc(sizeof(*c));
+      ex_args *c = static_cast<ex_args *>(gpr_malloc(sizeof(*c)));
       c->ctr = &args->ctr;
       c->value = n++;
       GRPC_CLOSURE_SCHED(&exec_ctx,
@@ -131,10 +131,11 @@ static void in_finally(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
 }
 
 static void add_finally(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {
-  GRPC_CLOSURE_SCHED(exec_ctx,
-                     GRPC_CLOSURE_CREATE(in_finally, arg,
-                                         grpc_combiner_finally_scheduler(arg)),
-                     GRPC_ERROR_NONE);
+  GRPC_CLOSURE_SCHED(
+      exec_ctx, GRPC_CLOSURE_CREATE(in_finally, arg,
+                                    grpc_combiner_finally_scheduler(
+                                        static_cast<grpc_combiner *>(arg))),
+      GRPC_ERROR_NONE);
 }
 
 static void test_execute_finally(void) {
diff --git a/test/core/iomgr/endpoint_pair_test.c b/test/core/iomgr/endpoint_pair_test.cc
index f2ce3d0d12..c7ce6c0419 100644
--- a/test/core/iomgr/endpoint_pair_test.c
+++ b/test/core/iomgr/endpoint_pair_test.cc
@@ -34,10 +34,11 @@ static grpc_endpoint_test_fixture create_fixture_endpoint_pair(
     size_t slice_size) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_endpoint_test_fixture f;
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = (int)slice_size}};
-  grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+  grpc_arg a[1];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER;
+  a[0].value.integer = (int)slice_size;
+  grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   grpc_endpoint_pair p = grpc_iomgr_create_endpoint_pair("test", &args);
 
   f.client_ep = p.client;
@@ -55,7 +56,7 @@ static grpc_endpoint_test_config configs[] = {
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, p);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(p));
 }
 
 int main(int argc, char **argv) {
@@ -63,7 +64,7 @@ int main(int argc, char **argv) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = gpr_zalloc(grpc_pollset_size());
+  g_pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(g_pollset, &g_mu);
   grpc_endpoint_tests(configs[0], g_pollset, g_mu);
   GRPC_CLOSURE_INIT(&destroyed, destroy_pollset, g_pollset,
diff --git a/test/core/iomgr/endpoint_tests.c b/test/core/iomgr/endpoint_tests.cc
index 61e901f645..61e901f645 100644
--- a/test/core/iomgr/endpoint_tests.c
+++ b/test/core/iomgr/endpoint_tests.cc
diff --git a/test/core/iomgr/error_test.c b/test/core/iomgr/error_test.cc
index 51f8af1957..51f8af1957 100644
--- a/test/core/iomgr/error_test.c
+++ b/test/core/iomgr/error_test.cc
diff --git a/test/core/iomgr/ev_epollsig_linux_test.c b/test/core/iomgr/ev_epollsig_linux_test.cc
index 37aadacd49..23079c12c6 100644
--- a/test/core/iomgr/ev_epollsig_linux_test.c
+++ b/test/core/iomgr/ev_epollsig_linux_test.cc
@@ -92,14 +92,15 @@ static void test_fd_cleanup(grpc_exec_ctx *exec_ctx, test_fd *tfds,
 static void test_pollset_init(test_pollset *pollsets, int num_pollsets) {
   int i;
   for (i = 0; i < num_pollsets; i++) {
-    pollsets[i].pollset = gpr_zalloc(grpc_pollset_size());
+    pollsets[i].pollset =
+        static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
     grpc_pollset_init(pollsets[i].pollset, &pollsets[i].mu);
   }
 }
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, p);
+  grpc_pollset_destroy(exec_ctx, (grpc_pollset *)p);
 }
 
 static void test_pollset_cleanup(grpc_exec_ctx *exec_ctx,
@@ -232,7 +233,7 @@ typedef struct threading_shared {
 static __thread int thread_wakeups = 0;
 
 static void test_threading_loop(void *arg) {
-  threading_shared *shared = arg;
+  threading_shared *shared = static_cast<threading_shared *>(arg);
   while (thread_wakeups < 1000000) {
     grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
     grpc_pollset_worker *worker;
@@ -247,7 +248,7 @@ static void test_threading_loop(void *arg) {
 
 static void test_threading_wakeup(grpc_exec_ctx *exec_ctx, void *arg,
                                   grpc_error *error) {
-  threading_shared *shared = arg;
+  threading_shared *shared = static_cast<threading_shared *>(arg);
   ++shared->wakeups;
   ++thread_wakeups;
   if (error == GRPC_ERROR_NONE) {
@@ -261,7 +262,7 @@ static void test_threading_wakeup(grpc_exec_ctx *exec_ctx, void *arg,
 
 static void test_threading(void) {
   threading_shared shared;
-  shared.pollset = gpr_zalloc(grpc_pollset_size());
+  shared.pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(shared.pollset, &shared.mu);
 
   gpr_thd_id thds[10];
diff --git a/test/core/iomgr/fd_conservation_posix_test.c b/test/core/iomgr/fd_conservation_posix_test.cc
index d29b1e8e41..d29b1e8e41 100644
--- a/test/core/iomgr/fd_conservation_posix_test.c
+++ b/test/core/iomgr/fd_conservation_posix_test.cc
diff --git a/test/core/iomgr/fd_posix_test.c b/test/core/iomgr/fd_posix_test.cc
index 1c62f34d3e..63363a43a5 100644
--- a/test/core/iomgr/fd_posix_test.c
+++ b/test/core/iomgr/fd_posix_test.cc
@@ -113,7 +113,7 @@ typedef struct {
    Close session FD and start to shutdown listen FD. */
 static void session_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
                                 bool success) {
-  session *se = arg;
+  session *se = static_cast<session *>(arg);
   server *sv = se->sv;
   grpc_fd_orphan(exec_ctx, se->em_fd, NULL, NULL, false /* already_closed */,
                  "a");
@@ -126,7 +126,7 @@ static void session_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
 /* Called when data become readable in a session. */
 static void session_read_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
                             grpc_error *error) {
-  session *se = arg;
+  session *se = static_cast<session *>(arg);
   int fd = grpc_fd_wrapped_fd(se->em_fd);
 
   ssize_t read_once = 0;
@@ -171,7 +171,7 @@ static void session_read_cb(grpc_exec_ctx *exec_ctx, void *arg, /*session */
    Close listen FD and signal that server can be shutdown. */
 static void listen_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg /*server */,
                                int success) {
-  server *sv = arg;
+  server *sv = static_cast<server *>(arg);
 
   grpc_fd_orphan(exec_ctx, sv->em_fd, NULL, NULL, false /* already_closed */,
                  "b");
@@ -186,7 +186,7 @@ static void listen_shutdown_cb(grpc_exec_ctx *exec_ctx, void *arg /*server */,
 /* Called when a new TCP connection request arrives in the listening port. */
 static void listen_cb(grpc_exec_ctx *exec_ctx, void *arg, /*=sv_arg*/
                       grpc_error *error) {
-  server *sv = arg;
+  server *sv = static_cast<server *>(arg);
   int fd;
   int flags;
   session *se;
@@ -204,7 +204,7 @@ static void listen_cb(grpc_exec_ctx *exec_ctx, void *arg, /*=sv_arg*/
   GPR_ASSERT(fd < FD_SETSIZE);
   flags = fcntl(fd, F_GETFL, 0);
   fcntl(fd, F_SETFL, flags | O_NONBLOCK);
-  se = gpr_malloc(sizeof(*se));
+  se = static_cast<session *>(gpr_malloc(sizeof(*se)));
   se->sv = sv;
   se->em_fd = grpc_fd_create(fd, "listener");
   grpc_pollset_add_fd(exec_ctx, g_pollset, se->em_fd);
@@ -291,7 +291,7 @@ static void client_init(client *cl) {
 /* Called when a client upload session is ready to shutdown. */
 static void client_session_shutdown_cb(grpc_exec_ctx *exec_ctx,
                                        void *arg /*client */, int success) {
-  client *cl = arg;
+  client *cl = static_cast<client *>(arg);
   grpc_fd_orphan(exec_ctx, cl->em_fd, NULL, NULL, false /* already_closed */,
                  "c");
   cl->done = 1;
@@ -302,7 +302,7 @@ static void client_session_shutdown_cb(grpc_exec_ctx *exec_ctx,
 /* Write as much as possible, then register notify_on_write. */
 static void client_session_write(grpc_exec_ctx *exec_ctx, void *arg, /*client */
                                  grpc_error *error) {
-  client *cl = arg;
+  client *cl = static_cast<client *>(arg);
   int fd = grpc_fd_wrapped_fd(cl->em_fd);
   ssize_t write_once = 0;
 
@@ -409,7 +409,7 @@ void destroy_change_data(fd_change_data *fdc) {}
 static void first_read_callback(grpc_exec_ctx *exec_ctx,
                                 void *arg /* fd_change_data */,
                                 grpc_error *error) {
-  fd_change_data *fdc = arg;
+  fd_change_data *fdc = static_cast<fd_change_data *>(arg);
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = first_read_callback;
@@ -421,7 +421,7 @@ static void first_read_callback(grpc_exec_ctx *exec_ctx,
 static void second_read_callback(grpc_exec_ctx *exec_ctx,
                                  void *arg /* fd_change_data */,
                                  grpc_error *error) {
-  fd_change_data *fdc = arg;
+  fd_change_data *fdc = static_cast<fd_change_data *>(arg);
 
   gpr_mu_lock(g_mu);
   fdc->cb_that_ran = second_read_callback;
@@ -516,7 +516,7 @@ static void test_grpc_fd_change(void) {
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, p);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(p));
 }
 
 int main(int argc, char **argv) {
@@ -524,7 +524,7 @@ int main(int argc, char **argv) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = gpr_zalloc(grpc_pollset_size());
+  g_pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(g_pollset, &g_mu);
   test_grpc_fd();
   test_grpc_fd_change();
diff --git a/test/core/iomgr/load_file_test.c b/test/core/iomgr/load_file_test.cc
index 537c3430b1..5fb8266b10 100644
--- a/test/core/iomgr/load_file_test.c
+++ b/test/core/iomgr/load_file_test.cc
@@ -122,7 +122,7 @@ static void test_load_big_file(void) {
   grpc_error *error;
   char *tmp_name;
   static const size_t buffer_size = 124631;
-  unsigned char *buffer = gpr_malloc(buffer_size);
+  unsigned char *buffer = static_cast<unsigned char *>(gpr_malloc(buffer_size));
   unsigned char *current;
   size_t i;
 
diff --git a/test/core/iomgr/pollset_set_test.c b/test/core/iomgr/pollset_set_test.cc
index cddc146ce0..ae19c81d6d 100644
--- a/test/core/iomgr/pollset_set_test.c
+++ b/test/core/iomgr/pollset_set_test.cc
@@ -65,14 +65,15 @@ typedef struct test_pollset {
 
 static void init_test_pollsets(test_pollset *pollsets, const int num_pollsets) {
   for (int i = 0; i < num_pollsets; i++) {
-    pollsets[i].ps = gpr_zalloc(grpc_pollset_size());
+    pollsets[i].ps =
+        static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
     grpc_pollset_init(pollsets[i].ps, &pollsets[i].mu);
   }
 }
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, p);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(p));
 }
 
 static void cleanup_test_pollsets(grpc_exec_ctx *exec_ctx,
diff --git a/test/core/iomgr/resolve_address_posix_test.c b/test/core/iomgr/resolve_address_posix_test.cc
index cb9d6080fb..572b4222b5 100644
--- a/test/core/iomgr/resolve_address_posix_test.c
+++ b/test/core/iomgr/resolve_address_posix_test.cc
@@ -50,7 +50,7 @@ static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
 
 void args_init(grpc_exec_ctx *exec_ctx, args_struct *args) {
   gpr_event_init(&args->ev);
-  args->pollset = gpr_zalloc(grpc_pollset_size());
+  args->pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
   grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
@@ -78,7 +78,7 @@ static grpc_millis n_sec_deadline(int seconds) {
 }
 
 static void actually_poll(void *argsp) {
-  args_struct *args = argsp;
+  args_struct *args = static_cast<args_struct *>(argsp);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_millis deadline = n_sec_deadline(10);
   while (true) {
@@ -109,7 +109,7 @@ static void poll_pollset_until_request_done(args_struct *args) {
 
 static void must_succeed(grpc_exec_ctx *exec_ctx, void *argsp,
                          grpc_error *err) {
-  args_struct *args = argsp;
+  args_struct *args = static_cast<args_struct *>(argsp);
   GPR_ASSERT(err == GRPC_ERROR_NONE);
   GPR_ASSERT(args->addrs != NULL);
   GPR_ASSERT(args->addrs->naddrs > 0);
@@ -117,7 +117,7 @@ static void must_succeed(grpc_exec_ctx *exec_ctx, void *argsp,
 }
 
 static void must_fail(grpc_exec_ctx *exec_ctx, void *argsp, grpc_error *err) {
-  args_struct *args = argsp;
+  args_struct *args = static_cast<args_struct *>(argsp);
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   gpr_atm_rel_store(&args->done_atm, 1);
 }
@@ -142,7 +142,8 @@ static void test_unix_socket_path_name_too_long(void) {
   const char prefix[] = "unix:/path/name";
   size_t path_name_length =
       GPR_ARRAY_SIZE(((struct sockaddr_un *)0)->sun_path) + 6;
-  char *path_name = gpr_malloc(sizeof(char) * path_name_length);
+  char *path_name =
+      static_cast<char *>(gpr_malloc(sizeof(char) * path_name_length));
   memset(path_name, 'a', path_name_length);
   memcpy(path_name, prefix, strlen(prefix) - 1);
   path_name[path_name_length - 1] = '\0';
diff --git a/test/core/iomgr/resolve_address_test.c b/test/core/iomgr/resolve_address_test.cc
index 178bbbb95f..da6aab3518 100644
--- a/test/core/iomgr/resolve_address_test.c
+++ b/test/core/iomgr/resolve_address_test.cc
@@ -43,7 +43,7 @@ static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
 
 void args_init(grpc_exec_ctx *exec_ctx, args_struct *args) {
   gpr_event_init(&args->ev);
-  args->pollset = gpr_zalloc(grpc_pollset_size());
+  args->pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args->pollset, &args->mu);
   args->pollset_set = grpc_pollset_set_create();
   grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
@@ -98,7 +98,7 @@ static void poll_pollset_until_request_done(args_struct *args) {
 
 static void must_succeed(grpc_exec_ctx *exec_ctx, void *argsp,
                          grpc_error *err) {
-  args_struct *args = argsp;
+  args_struct *args = static_cast<args_struct *>(argsp);
   GPR_ASSERT(err == GRPC_ERROR_NONE);
   GPR_ASSERT(args->addrs != NULL);
   GPR_ASSERT(args->addrs->naddrs > 0);
@@ -110,7 +110,7 @@ static void must_succeed(grpc_exec_ctx *exec_ctx, void *argsp,
 }
 
 static void must_fail(grpc_exec_ctx *exec_ctx, void *argsp, grpc_error *err) {
-  args_struct *args = argsp;
+  args_struct *args = static_cast<args_struct *>(argsp);
   GPR_ASSERT(err != GRPC_ERROR_NONE);
   gpr_atm_rel_store(&args->done_atm, 1);
   gpr_mu_lock(args->mu);
diff --git a/test/core/iomgr/resource_quota_test.c b/test/core/iomgr/resource_quota_test.cc
index b588f3d120..f0002e0947 100644
--- a/test/core/iomgr/resource_quota_test.c
+++ b/test/core/iomgr/resource_quota_test.cc
@@ -58,7 +58,7 @@ typedef struct {
 static void reclaimer_cb(grpc_exec_ctx *exec_ctx, void *args,
                          grpc_error *error) {
   GPR_ASSERT(error == GRPC_ERROR_NONE);
-  reclaimer_args *a = args;
+  reclaimer_args *a = static_cast<reclaimer_args *>(args);
   grpc_resource_user_free(exec_ctx, a->resource_user, a->size);
   grpc_resource_user_finish_reclamation(exec_ctx, a->resource_user);
   GRPC_CLOSURE_RUN(exec_ctx, a->then, GRPC_ERROR_NONE);
@@ -66,7 +66,7 @@ static void reclaimer_cb(grpc_exec_ctx *exec_ctx, void *args,
 }
 grpc_closure *make_reclaimer(grpc_resource_user *resource_user, size_t size,
                              grpc_closure *then) {
-  reclaimer_args *a = gpr_malloc(sizeof(*a));
+  reclaimer_args *a = static_cast<reclaimer_args *>(gpr_malloc(sizeof(*a)));
   a->size = size;
   a->resource_user = resource_user;
   a->then = then;
@@ -76,7 +76,7 @@ grpc_closure *make_reclaimer(grpc_resource_user *resource_user, size_t size,
 static void unused_reclaimer_cb(grpc_exec_ctx *exec_ctx, void *arg,
                                 grpc_error *error) {
   GPR_ASSERT(error == GRPC_ERROR_CANCELLED);
-  GRPC_CLOSURE_RUN(exec_ctx, arg, GRPC_ERROR_NONE);
+  GRPC_CLOSURE_RUN(exec_ctx, static_cast<grpc_closure *>(arg), GRPC_ERROR_NONE);
 }
 grpc_closure *make_unused_reclaimer(grpc_closure *then) {
   return GRPC_CLOSURE_CREATE(unused_reclaimer_cb, then,
diff --git a/test/core/iomgr/sockaddr_utils_test.c b/test/core/iomgr/sockaddr_utils_test.cc
index e4a4ddaa99..e4a4ddaa99 100644
--- a/test/core/iomgr/sockaddr_utils_test.c
+++ b/test/core/iomgr/sockaddr_utils_test.cc
diff --git a/test/core/iomgr/socket_utils_test.c b/test/core/iomgr/socket_utils_test.cc
index 30f0c943dc..30f0c943dc 100644
--- a/test/core/iomgr/socket_utils_test.c
+++ b/test/core/iomgr/socket_utils_test.cc
diff --git a/test/core/iomgr/tcp_client_posix_test.c b/test/core/iomgr/tcp_client_posix_test.cc
index b8b76d1c42..b2dcb1d04f 100644
--- a/test/core/iomgr/tcp_client_posix_test.c
+++ b/test/core/iomgr/tcp_client_posix_test.cc
@@ -190,7 +190,7 @@ void test_fails(void) {
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, p);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(p));
 }
 
 int main(int argc, char **argv) {
@@ -199,7 +199,7 @@ int main(int argc, char **argv) {
   grpc_test_init(argc, argv);
   grpc_init();
   g_pollset_set = grpc_pollset_set_create();
-  g_pollset = gpr_zalloc(grpc_pollset_size());
+  g_pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(g_pollset, &g_mu);
   grpc_pollset_set_add_pollset(&exec_ctx, g_pollset_set, g_pollset);
   grpc_exec_ctx_finish(&exec_ctx);
diff --git a/test/core/iomgr/tcp_client_uv_test.c b/test/core/iomgr/tcp_client_uv_test.cc
index edfccbe867..edfccbe867 100644
--- a/test/core/iomgr/tcp_client_uv_test.c
+++ b/test/core/iomgr/tcp_client_uv_test.cc
diff --git a/test/core/iomgr/tcp_posix_test.c b/test/core/iomgr/tcp_posix_test.cc
index 6501160c6f..8a4433b55c 100644
--- a/test/core/iomgr/tcp_posix_test.c
+++ b/test/core/iomgr/tcp_posix_test.cc
@@ -171,10 +171,10 @@ static void read_test(size_t num_bytes, size_t slice_size) {
 
   create_sockets(sv);
 
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = (int)slice_size}};
-  grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+  grpc_arg a[1];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER, a[0].value.integer = (int)slice_size;
+  grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "read_test"), &args,
                        "test");
   grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
@@ -223,10 +223,11 @@ static void large_read_test(size_t slice_size) {
 
   create_sockets(sv);
 
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = (int)slice_size}};
-  grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+  grpc_arg a[1];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER;
+  a[0].value.integer = (int)slice_size;
+  grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "large_read_test"),
                        &args, "test");
   grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
@@ -363,10 +364,10 @@ static void write_test(size_t num_bytes, size_t slice_size) {
 
   create_sockets(sv);
 
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = (int)slice_size}};
-  grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+  grpc_arg a[1];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER, a[0].value.integer = (int)slice_size;
+  grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "write_test"), &args,
                        "test");
   grpc_endpoint_add_to_pollset(&exec_ctx, ep, g_pollset);
@@ -433,10 +434,11 @@ static void release_fd_test(size_t num_bytes, size_t slice_size) {
 
   create_sockets(sv);
 
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = (int)slice_size}};
-  grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+  grpc_arg a[1];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER;
+  a[0].value.integer = (int)slice_size;
+  grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   ep = grpc_tcp_create(&exec_ctx, grpc_fd_create(sv[1], "read_test"), &args,
                        "test");
   GPR_ASSERT(grpc_tcp_fd(ep) == sv[1] && sv[1] >= 0);
@@ -525,10 +527,11 @@ static grpc_endpoint_test_fixture create_fixture_tcp_socketpair(
   create_sockets(sv);
   grpc_resource_quota *resource_quota =
       grpc_resource_quota_create("tcp_posix_test_socketpair");
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = (int)slice_size}};
-  grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
+  grpc_arg a[1];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER;
+  a[0].value.integer = (int)slice_size;
+  grpc_channel_args args = {GPR_ARRAY_SIZE(a), a};
   f.client_ep = grpc_tcp_create(
       &exec_ctx, grpc_fd_create(sv[0], "fixture:client"), &args, "test");
   f.server_ep = grpc_tcp_create(
diff --git a/test/core/iomgr/tcp_server_posix_test.c b/test/core/iomgr/tcp_server_posix_test.cc
index 782dfb413a..a44e3954f2 100644
--- a/test/core/iomgr/tcp_server_posix_test.c
+++ b/test/core/iomgr/tcp_server_posix_test.cc
@@ -112,7 +112,7 @@ static void on_connect_result_set(on_connect_result *result,
 
 static void server_weak_ref_shutdown(grpc_exec_ctx *exec_ctx, void *arg,
                                      grpc_error *error) {
-  server_weak_ref *weak_ref = arg;
+  server_weak_ref *weak_ref = static_cast<server_weak_ref *>(arg);
   weak_ref->server = NULL;
 }
 
@@ -429,22 +429,25 @@ static void test_connect(size_t num_connects,
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, p);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(p));
 }
 
 int main(int argc, char **argv) {
   grpc_closure destroyed;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_arg chan_args[] = {
-      {GRPC_ARG_INTEGER, GRPC_ARG_EXPAND_WILDCARD_ADDRS, {.integer = 1}}};
+  grpc_arg chan_args[1];
+  chan_args[0].type = GRPC_ARG_INTEGER;
+  chan_args[0].key = const_cast<char *>(GRPC_ARG_EXPAND_WILDCARD_ADDRS);
+  chan_args[0].value.integer = 1;
   const grpc_channel_args channel_args = {1, chan_args};
   struct ifaddrs *ifa = NULL;
   struct ifaddrs *ifa_it;
   // Zalloc dst_addrs to avoid oversized frames.
-  test_addrs *dst_addrs = gpr_zalloc(sizeof(*dst_addrs));
+  test_addrs *dst_addrs =
+      static_cast<test_addrs *>(gpr_zalloc(sizeof(*dst_addrs)));
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = gpr_zalloc(grpc_pollset_size());
+  g_pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(g_pollset, &g_mu);
 
   test_no_op();
diff --git a/test/core/iomgr/tcp_server_uv_test.c b/test/core/iomgr/tcp_server_uv_test.cc
index 9fafd3177a..9fafd3177a 100644
--- a/test/core/iomgr/tcp_server_uv_test.c
+++ b/test/core/iomgr/tcp_server_uv_test.cc
diff --git a/test/core/iomgr/time_averaged_stats_test.c b/test/core/iomgr/time_averaged_stats_test.cc
index 508e3c5bf8..508e3c5bf8 100644
--- a/test/core/iomgr/time_averaged_stats_test.c
+++ b/test/core/iomgr/time_averaged_stats_test.cc
diff --git a/test/core/iomgr/timer_heap_test.c b/test/core/iomgr/timer_heap_test.cc
index ee5a474fd1..3eb25dd0be 100644
--- a/test/core/iomgr/timer_heap_test.c
+++ b/test/core/iomgr/timer_heap_test.cc
@@ -35,7 +35,8 @@
 static gpr_atm random_deadline(void) { return rand(); }
 
 static grpc_timer *create_test_elements(size_t num_elements) {
-  grpc_timer *elems = gpr_malloc(num_elements * sizeof(grpc_timer));
+  grpc_timer *elems =
+      static_cast<grpc_timer *>(gpr_malloc(num_elements * sizeof(grpc_timer)));
   size_t i;
   for (i = 0; i < num_elements; i++) {
     elems[i].deadline = random_deadline();
@@ -75,7 +76,7 @@ static void test1(void) {
   const size_t num_test_operations = 10000;
   size_t i;
   grpc_timer *test_elements = create_test_elements(num_test_elements);
-  uint8_t *inpq = gpr_malloc(num_test_elements);
+  uint8_t *inpq = static_cast<uint8_t *>(gpr_malloc(num_test_elements));
 
   gpr_log(GPR_INFO, "test1");
 
@@ -135,7 +136,8 @@ typedef struct {
 
 static elem_struct *search_elems(elem_struct *elems, size_t count,
                                  bool inserted) {
-  size_t *search_order = gpr_malloc(count * sizeof(*search_order));
+  size_t *search_order =
+      static_cast<size_t *>(gpr_malloc(count * sizeof(*search_order)));
   for (size_t i = 0; i < count; i++) {
     search_order[i] = i;
   }
@@ -160,7 +162,8 @@ static void test2(void) {
   grpc_timer_heap pq;
 
   static const size_t elems_size = 1000;
-  elem_struct *elems = gpr_malloc(elems_size * sizeof(elem_struct));
+  elem_struct *elems =
+      static_cast<elem_struct *>(gpr_malloc(elems_size * sizeof(elem_struct)));
   size_t num_inserted = 0;
 
   grpc_timer_heap_init(&pq);
diff --git a/test/core/iomgr/timer_list_test.c b/test/core/iomgr/timer_list_test.cc
index c3d9f9d88d..c3d9f9d88d 100644
--- a/test/core/iomgr/timer_list_test.c
+++ b/test/core/iomgr/timer_list_test.cc
diff --git a/test/core/iomgr/udp_server_test.c b/test/core/iomgr/udp_server_test.cc
index 2e44d0abc8..51c7ab8c29 100644
--- a/test/core/iomgr/udp_server_test.c
+++ b/test/core/iomgr/udp_server_test.cc
@@ -118,7 +118,8 @@ static const grpc_socket_factory_vtable test_socket_factory_vtable = {
     test_socket_factory_compare, test_socket_factory_destroy};
 
 static test_socket_factory *test_socket_factory_create(void) {
-  test_socket_factory *factory = gpr_malloc(sizeof(test_socket_factory));
+  test_socket_factory *factory = static_cast<test_socket_factory *>(
+      gpr_malloc(sizeof(test_socket_factory)));
   grpc_socket_factory_init(&factory->base, &test_socket_factory_vtable);
   factory->number_of_socket_calls = 0;
   factory->number_of_bind_calls = 0;
@@ -292,7 +293,7 @@ static void test_receive(int number_of_clients) {
 
 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, p);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(p));
 }
 
 int main(int argc, char **argv) {
@@ -300,7 +301,7 @@ int main(int argc, char **argv) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
-  g_pollset = gpr_zalloc(grpc_pollset_size());
+  g_pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(g_pollset, &g_mu);
 
   test_no_op();
diff --git a/test/core/iomgr/wakeup_fd_cv_test.c b/test/core/iomgr/wakeup_fd_cv_test.cc
index 0b211274f2..0b211274f2 100644
--- a/test/core/iomgr/wakeup_fd_cv_test.c
+++ b/test/core/iomgr/wakeup_fd_cv_test.cc
diff --git a/test/core/json/fuzzer.c b/test/core/json/fuzzer.cc
index b825904d41..a8b75f72a2 100644
--- a/test/core/json/fuzzer.c
+++ b/test/core/json/fuzzer.cc
@@ -33,7 +33,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   char *s;
   struct grpc_memory_counters counters;
   grpc_memory_counters_init();
-  s = gpr_malloc(size);
+  s = static_cast<char *>(gpr_malloc(size));
   memcpy(s, data, size);
   grpc_json *x;
   if ((x = grpc_json_parse_string_with_len(s, size))) {
diff --git a/test/core/json/json_rewrite.c b/test/core/json/json_rewrite.cc
index dfe32f5adf..27443e3c49 100644
--- a/test/core/json/json_rewrite.c
+++ b/test/core/json/json_rewrite.cc
@@ -45,18 +45,18 @@ typedef struct json_reader_userdata {
 } json_reader_userdata;
 
 static void json_writer_output_char(void *userdata, char c) {
-  json_writer_userdata *state = userdata;
+  json_writer_userdata *state = static_cast<json_writer_userdata *>(userdata);
   fputc(c, state->out);
 }
 
 static void json_writer_output_string(void *userdata, const char *str) {
-  json_writer_userdata *state = userdata;
+  json_writer_userdata *state = static_cast<json_writer_userdata *>(userdata);
   fputs(str, state->out);
 }
 
 static void json_writer_output_string_with_len(void *userdata, const char *str,
                                                size_t len) {
-  json_writer_userdata *state = userdata;
+  json_writer_userdata *state = static_cast<json_writer_userdata *>(userdata);
   fwrite(str, len, 1, state->out);
 }
 
@@ -68,19 +68,20 @@ static void check_string(json_reader_userdata *state, size_t needed) {
   if (state->free_space >= needed) return;
   needed -= state->free_space;
   needed = (needed + 0xffu) & ~0xffu;
-  state->scratchpad = gpr_realloc(state->scratchpad, state->allocated + needed);
+  state->scratchpad = static_cast<char *>(
+      gpr_realloc(state->scratchpad, state->allocated + needed));
   state->free_space += needed;
   state->allocated += needed;
 }
 
 static void json_reader_string_clear(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   state->free_space = state->allocated;
   state->string_len = 0;
 }
 
 static void json_reader_string_add_char(void *userdata, uint32_t c) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   check_string(state, 1);
   GPR_ASSERT(c < 256);
   state->scratchpad[state->string_len++] = (char)c;
@@ -115,7 +116,7 @@ static void json_reader_string_add_utf32(void *userdata, uint32_t c) {
 
 static uint32_t json_reader_read_char(void *userdata) {
   int r;
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   r = fgetc(state->in);
   if (r == EOF) r = GRPC_JSON_READ_CHAR_EOF;
@@ -123,8 +124,9 @@ static uint32_t json_reader_read_char(void *userdata) {
 }
 
 static void json_reader_container_begins(void *userdata, grpc_json_type type) {
-  json_reader_userdata *state = userdata;
-  stacked_container *container = gpr_malloc(sizeof(stacked_container));
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
+  stacked_container *container =
+      static_cast<stacked_container *>(gpr_malloc(sizeof(stacked_container)));
 
   container->type = type;
   container->next = state->top;
@@ -134,7 +136,7 @@ static void json_reader_container_begins(void *userdata, grpc_json_type type) {
 }
 
 static grpc_json_type json_reader_container_ends(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   stacked_container *container = state->top;
 
   grpc_json_writer_container_ends(state->writer, container->type);
@@ -144,21 +146,21 @@ static grpc_json_type json_reader_container_ends(void *userdata) {
 }
 
 static void json_reader_set_key(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   json_reader_string_add_char(userdata, 0);
 
   grpc_json_writer_object_key(state->writer, state->scratchpad);
 }
 
 static void json_reader_set_string(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   json_reader_string_add_char(userdata, 0);
 
   grpc_json_writer_value_string(state->writer, state->scratchpad);
 }
 
 static int json_reader_set_number(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, state->scratchpad,
                                       state->string_len);
@@ -167,19 +169,19 @@ static int json_reader_set_number(void *userdata) {
 }
 
 static void json_reader_set_true(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, "true", 4);
 }
 
 static void json_reader_set_false(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, "false", 5);
 }
 
 static void json_reader_set_null(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, "null", 4);
 }
diff --git a/test/core/json/json_rewrite_test.c b/test/core/json/json_rewrite_test.cc
index a654971b34..ba22709a70 100644
--- a/test/core/json/json_rewrite_test.c
+++ b/test/core/json/json_rewrite_test.cc
@@ -47,7 +47,7 @@ typedef struct json_reader_userdata {
 } json_reader_userdata;
 
 static void json_writer_output_char(void *userdata, char c) {
-  json_writer_userdata *state = userdata;
+  json_writer_userdata *state = static_cast<json_writer_userdata *>(userdata);
   int cmp = fgetc(state->cmp);
 
   /* treat CRLF as LF */
@@ -79,19 +79,20 @@ static void check_string(json_reader_userdata *state, size_t needed) {
   if (state->free_space >= needed) return;
   needed -= state->free_space;
   needed = (needed + 0xffu) & ~0xffu;
-  state->scratchpad = gpr_realloc(state->scratchpad, state->allocated + needed);
+  state->scratchpad = static_cast<char *>(
+      gpr_realloc(state->scratchpad, state->allocated + needed));
   state->free_space += needed;
   state->allocated += needed;
 }
 
 static void json_reader_string_clear(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   state->free_space = state->allocated;
   state->string_len = 0;
 }
 
 static void json_reader_string_add_char(void *userdata, uint32_t c) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   check_string(state, 1);
   GPR_ASSERT(c <= 256);
   state->scratchpad[state->string_len++] = (char)c;
@@ -126,7 +127,7 @@ static void json_reader_string_add_utf32(void *userdata, uint32_t c) {
 
 static uint32_t json_reader_read_char(void *userdata) {
   int r;
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   if (!state->did_eagain) {
     state->did_eagain = 1;
@@ -141,8 +142,9 @@ static uint32_t json_reader_read_char(void *userdata) {
 }
 
 static void json_reader_container_begins(void *userdata, grpc_json_type type) {
-  json_reader_userdata *state = userdata;
-  stacked_container *container = gpr_malloc(sizeof(stacked_container));
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
+  stacked_container *container =
+      static_cast<stacked_container *>(gpr_malloc(sizeof(stacked_container)));
 
   container->type = type;
   container->next = state->top;
@@ -152,7 +154,7 @@ static void json_reader_container_begins(void *userdata, grpc_json_type type) {
 }
 
 static grpc_json_type json_reader_container_ends(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   stacked_container *container = state->top;
 
   grpc_json_writer_container_ends(state->writer, container->type);
@@ -162,21 +164,21 @@ static grpc_json_type json_reader_container_ends(void *userdata) {
 }
 
 static void json_reader_set_key(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   json_reader_string_add_char(userdata, 0);
 
   grpc_json_writer_object_key(state->writer, state->scratchpad);
 }
 
 static void json_reader_set_string(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
   json_reader_string_add_char(userdata, 0);
 
   grpc_json_writer_value_string(state->writer, state->scratchpad);
 }
 
 static int json_reader_set_number(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, state->scratchpad,
                                       state->string_len);
@@ -185,19 +187,19 @@ static int json_reader_set_number(void *userdata) {
 }
 
 static void json_reader_set_true(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, "true", 4);
 }
 
 static void json_reader_set_false(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, "false", 5);
 }
 
 static void json_reader_set_null(void *userdata) {
-  json_reader_userdata *state = userdata;
+  json_reader_userdata *state = static_cast<json_reader_userdata *>(userdata);
 
   grpc_json_writer_value_raw_with_len(state->writer, "null", 4);
 }
diff --git a/test/core/json/json_stream_error_test.c b/test/core/json/json_stream_error_test.cc
index 379cd5d078..379cd5d078 100644
--- a/test/core/json/json_stream_error_test.c
+++ b/test/core/json/json_stream_error_test.cc
diff --git a/test/core/json/json_test.c b/test/core/json/json_test.cc
index bbc6f7a4e6..bbc6f7a4e6 100644
--- a/test/core/json/json_test.c
+++ b/test/core/json/json_test.cc
diff --git a/test/core/memory_usage/client.c b/test/core/memory_usage/client.cc
index 6392554d85..fbf907fe33 100644
--- a/test/core/memory_usage/client.c
+++ b/test/core/memory_usage/client.cc
@@ -183,7 +183,7 @@ int main(int argc, char **argv) {
   grpc_slice slice = grpc_slice_from_copied_string("x");
   char *fake_argv[1];
 
-  char *target = "localhost:443";
+  const char *target = "localhost:443";
   gpr_cmdline *cl;
   grpc_event event;
 
diff --git a/test/core/memory_usage/memory_usage_test.c b/test/core/memory_usage/memory_usage_test.cc
index f4ee6c65e3..7bf165719b 100644
--- a/test/core/memory_usage/memory_usage_test.c
+++ b/test/core/memory_usage/memory_usage_test.cc
@@ -44,9 +44,9 @@ int main(int argc, char **argv) {
   /* start the server */
   gpr_asprintf(&args[0], "%s/memory_profile_server%s", root,
                gpr_subprocess_binary_extension());
-  args[1] = "--bind";
+  args[1] = const_cast<char *>("--bind");
   gpr_join_host_port(&args[2], "::", port);
-  args[3] = "--no-secure";
+  args[3] = const_cast<char *>("--no-secure");
   svr = gpr_subprocess_create(4, (const char **)args);
   gpr_free(args[0]);
   gpr_free(args[2]);
@@ -54,10 +54,10 @@ int main(int argc, char **argv) {
   /* start the client */
   gpr_asprintf(&args[0], "%s/memory_profile_client%s", root,
                gpr_subprocess_binary_extension());
-  args[1] = "--target";
+  args[1] = const_cast<char *>("--target");
   gpr_join_host_port(&args[2], "127.0.0.1", port);
-  args[3] = "--warmup=1000";
-  args[4] = "--benchmark=9000";
+  args[3] = const_cast<char *>("--warmup=1000");
+  args[4] = const_cast<char *>("--benchmark=9000");
   cli = gpr_subprocess_create(5, (const char **)args);
   gpr_free(args[0]);
   gpr_free(args[2]);
diff --git a/test/core/memory_usage/server.c b/test/core/memory_usage/server.cc
index b25341ead2..8dee58e274 100644
--- a/test/core/memory_usage/server.c
+++ b/test/core/memory_usage/server.cc
@@ -151,7 +151,7 @@ int main(int argc, char **argv) {
   int shutdown_finished = 0;
 
   int secure = 0;
-  char *addr = NULL;
+  const char *addr = NULL;
 
   char *fake_argv[1];
 
@@ -231,7 +231,7 @@ int main(int argc, char **argv) {
         cq, gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
                          gpr_time_from_micros(1000000, GPR_TIMESPAN)),
         NULL);
-    fling_call *s = ev.tag;
+    fling_call *s = static_cast<fling_call *>(ev.tag);
     switch (ev.type) {
       case GRPC_OP_COMPLETE:
         switch (s->state) {
diff --git a/test/core/nanopb/fuzzer_response.c b/test/core/nanopb/fuzzer_response.cc
index c9b63979a1..c9b63979a1 100644
--- a/test/core/nanopb/fuzzer_response.c
+++ b/test/core/nanopb/fuzzer_response.cc
diff --git a/test/core/nanopb/fuzzer_serverlist.c b/test/core/nanopb/fuzzer_serverlist.cc
index dd70f0c331..dd70f0c331 100644
--- a/test/core/nanopb/fuzzer_serverlist.c
+++ b/test/core/nanopb/fuzzer_serverlist.cc
diff --git a/test/core/network_benchmarks/low_level_ping_pong.c b/test/core/network_benchmarks/low_level_ping_pong.cc
index 1550003eb9..1550003eb9 100644
--- a/test/core/network_benchmarks/low_level_ping_pong.c
+++ b/test/core/network_benchmarks/low_level_ping_pong.cc
diff --git a/test/core/security/auth_context_test.c b/test/core/security/auth_context_test.cc
index 88daf28c99..88daf28c99 100644
--- a/test/core/security/auth_context_test.c
+++ b/test/core/security/auth_context_test.cc
diff --git a/test/core/security/create_jwt.c b/test/core/security/create_jwt.cc
index 93ea27f425..2444dbeae7 100644
--- a/test/core/security/create_jwt.c
+++ b/test/core/security/create_jwt.cc
@@ -54,9 +54,9 @@ void create_jwt(const char *json_key_file_path, const char *service_url,
 }
 
 int main(int argc, char **argv) {
-  char *scope = NULL;
-  char *json_key_file_path = NULL;
-  char *service_url = NULL;
+  const char *scope = NULL;
+  const char *json_key_file_path = NULL;
+  const char *service_url = NULL;
   grpc_init();
   gpr_cmdline *cl = gpr_cmdline_create("create_jwt");
   gpr_cmdline_add_string(cl, "json_key", "File path of the json key.",
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.cc
index 34f310142c..dfc071b64a 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.cc
@@ -44,7 +44,8 @@
 
 static grpc_channel_credentials *grpc_mock_channel_credentials_create(
     const grpc_channel_credentials_vtable *vtable) {
-  grpc_channel_credentials *c = gpr_malloc(sizeof(*c));
+  grpc_channel_credentials *c =
+      static_cast<grpc_channel_credentials *>(gpr_malloc(sizeof(*c)));
   memset(c, 0, sizeof(*c));
   c->type = "mock";
   c->vtable = vtable;
@@ -122,7 +123,7 @@ static char *test_json_key_str(void) {
   size_t result_len = strlen(test_json_key_str_part1) +
                       strlen(test_json_key_str_part2) +
                       strlen(test_json_key_str_part3);
-  char *result = gpr_malloc(result_len + 1);
+  char *result = static_cast<char *>(gpr_malloc(result_len + 1));
   char *current = result;
   strcpy(result, test_json_key_str_part1);
   current += strlen(test_json_key_str_part1);
@@ -363,7 +364,8 @@ static void check_request_metadata(grpc_exec_ctx *exec_ctx, void *arg,
 static request_metadata_state *make_request_metadata_state(
     grpc_error *expected_error, const expected_md *expected,
     size_t expected_size) {
-  request_metadata_state *state = gpr_zalloc(sizeof(*state));
+  request_metadata_state *state =
+      static_cast<request_metadata_state *>(gpr_zalloc(sizeof(*state)));
   state->expected_error = expected_error;
   state->expected = expected;
   state->expected_size = expected_size;
@@ -934,7 +936,8 @@ static int default_creds_gce_detection_httpcli_get_success_override(
     grpc_millis deadline, grpc_closure *on_done,
     grpc_httpcli_response *response) {
   *response = http_response(200, "");
-  grpc_http_header *headers = gpr_malloc(sizeof(*headers) * 1);
+  grpc_http_header *headers =
+      static_cast<grpc_http_header *>(gpr_malloc(sizeof(*headers) * 1));
   headers[0].key = gpr_strdup("Metadata-Flavor");
   headers[0].value = gpr_strdup("Google");
   response->hdr_count = 1;
diff --git a/test/core/security/fetch_oauth2.c b/test/core/security/fetch_oauth2.cc
index 3998cb51cd..1f1cf11545 100644
--- a/test/core/security/fetch_oauth2.c
+++ b/test/core/security/fetch_oauth2.cc
@@ -44,7 +44,7 @@ static grpc_call_credentials *create_refresh_token_creds(
 int main(int argc, char **argv) {
   grpc_call_credentials *creds = NULL;
   char *json_key_file_path = NULL;
-  char *json_refresh_token_file_path = NULL;
+  const char *json_refresh_token_file_path = NULL;
   char *token = NULL;
   int use_gce = 0;
   char *scope = NULL;
diff --git a/test/core/security/json_token_test.c b/test/core/security/json_token_test.cc
index 6573f70e72..70661a111b 100644
--- a/test/core/security/json_token_test.c
+++ b/test/core/security/json_token_test.cc
@@ -81,7 +81,7 @@ static char *test_json_key_str(const char *bad_part3) {
   const char *part3 = bad_part3 != NULL ? bad_part3 : test_json_key_str_part3;
   size_t result_len = strlen(test_json_key_str_part1) +
                       strlen(test_json_key_str_part2) + strlen(part3);
-  char *result = gpr_malloc(result_len + 1);
+  char *result = static_cast<char *>(gpr_malloc(result_len + 1));
   char *current = result;
   strcpy(result, test_json_key_str_part1);
   current += strlen(test_json_key_str_part1);
@@ -211,12 +211,12 @@ static grpc_json *parse_json_part_from_jwt(const char *str, size_t len,
   char *decoded;
   grpc_json *json;
   grpc_slice slice;
-  b64 = gpr_malloc(len + 1);
+  b64 = static_cast<char *>(gpr_malloc(len + 1));
   strncpy(b64, str, len);
   b64[len] = '\0';
   slice = grpc_base64_decode(&exec_ctx, b64, 1);
   GPR_ASSERT(!GRPC_SLICE_IS_EMPTY(slice));
-  decoded = gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1);
+  decoded = static_cast<char *>(gpr_malloc(GRPC_SLICE_LENGTH(slice) + 1));
   strncpy(decoded, (const char *)GRPC_SLICE_START_PTR(slice),
           GRPC_SLICE_LENGTH(slice));
   decoded[GRPC_SLICE_LENGTH(slice)] = '\0';
diff --git a/test/core/security/jwt_verifier_test.c b/test/core/security/jwt_verifier_test.cc
index a4bfe0130e..b0b94ba250 100644
--- a/test/core/security/jwt_verifier_test.c
+++ b/test/core/security/jwt_verifier_test.cc
@@ -292,7 +292,7 @@ static void test_bad_subject_claims_failure(void) {
 static char *json_key_str(const char *last_part) {
   size_t result_len = strlen(json_key_str_part1) + strlen(json_key_str_part2) +
                       strlen(last_part);
-  char *result = gpr_malloc(result_len + 1);
+  char *result = static_cast<char *>(gpr_malloc(result_len + 1));
   char *current = result;
   strcpy(result, json_key_str_part1);
   current += strlen(json_key_str_part1);
@@ -305,7 +305,7 @@ static char *json_key_str(const char *last_part) {
 static char *good_google_email_keys(void) {
   size_t result_len = strlen(good_google_email_keys_part1) +
                       strlen(good_google_email_keys_part2);
-  char *result = gpr_malloc(result_len + 1);
+  char *result = static_cast<char *>(gpr_malloc(result_len + 1));
   char *current = result;
   strcpy(result, good_google_email_keys_part1);
   current += strlen(good_google_email_keys_part1);
diff --git a/test/core/security/oauth2_utils.c b/test/core/security/oauth2_utils.cc
index 73d6c5bc7d..73d6c5bc7d 100644
--- a/test/core/security/oauth2_utils.c
+++ b/test/core/security/oauth2_utils.cc
diff --git a/test/core/security/print_google_default_creds_token.c b/test/core/security/print_google_default_creds_token.cc
index 29c38dfdf8..81c992c4d6 100644
--- a/test/core/security/print_google_default_creds_token.c
+++ b/test/core/security/print_google_default_creds_token.cc
@@ -43,7 +43,7 @@ typedef struct {
 
 static void on_metadata_response(grpc_exec_ctx *exec_ctx, void *arg,
                                  grpc_error *error) {
-  synchronizer *sync = arg;
+  synchronizer *sync = static_cast<synchronizer *>(arg);
   if (error != GRPC_ERROR_NONE) {
     fprintf(stderr, "Fetching token failed: %s\n", grpc_error_string(error));
   } else {
@@ -67,9 +67,11 @@ int main(int argc, char **argv) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   synchronizer sync;
   grpc_channel_credentials *creds = NULL;
-  char *service_url = "https://test.foo.google.com/Foo";
+  const char *service_url = "https://test.foo.google.com/Foo";
   grpc_auth_metadata_context context;
   gpr_cmdline *cl = gpr_cmdline_create("print_google_default_creds_token");
+  grpc_pollset *pollset = nullptr;
+  grpc_error *error = nullptr;
   gpr_cmdline_add_string(cl, "service_url",
                          "Service URL for the token request.", &service_url);
   gpr_cmdline_parse(cl, argc, argv);
@@ -86,14 +88,14 @@ int main(int argc, char **argv) {
   }
 
   memset(&sync, 0, sizeof(sync));
-  grpc_pollset *pollset = gpr_zalloc(grpc_pollset_size());
+  pollset = (grpc_pollset *)gpr_zalloc(grpc_pollset_size());
   grpc_pollset_init(pollset, &sync.mu);
   sync.pops = grpc_polling_entity_create_from_pollset(pollset);
   sync.is_done = false;
   GRPC_CLOSURE_INIT(&sync.on_request_metadata, on_metadata_response, &sync,
                     grpc_schedule_on_exec_ctx);
 
-  grpc_error *error = GRPC_ERROR_NONE;
+  error = GRPC_ERROR_NONE;
   if (grpc_call_credentials_get_request_metadata(
           &exec_ctx, ((grpc_composite_channel_credentials *)creds)->call_creds,
           &sync.pops, context, &sync.md_array, &sync.on_request_metadata,
diff --git a/test/core/security/secure_endpoint_test.c b/test/core/security/secure_endpoint_test.cc
index 839a05fa9b..fe7961d1d9 100644
--- a/test/core/security/secure_endpoint_test.c
+++ b/test/core/security/secure_endpoint_test.cc
@@ -52,9 +52,10 @@ static grpc_endpoint_test_fixture secure_endpoint_create_fixture_tcp_socketpair(
   grpc_endpoint_test_fixture f;
   grpc_endpoint_pair tcp;
 
-  grpc_arg a[] = {{.key = GRPC_ARG_TCP_READ_CHUNK_SIZE,
-                   .type = GRPC_ARG_INTEGER,
-                   .value.integer = (int)slice_size}};
+  grpc_arg a[1];
+  a[0].key = const_cast<char *>(GRPC_ARG_TCP_READ_CHUNK_SIZE);
+  a[0].type = GRPC_ARG_INTEGER;
+  a[0].value.integer = (int)slice_size;
   grpc_channel_args args = {.num_args = GPR_ARRAY_SIZE(a), .args = a};
   tcp = grpc_iomgr_create_endpoint_pair("fixture", &args);
   grpc_endpoint_add_to_pollset(&exec_ctx, tcp.client, g_pollset);
diff --git a/test/core/security/security_connector_test.c b/test/core/security/security_connector_test.cc
index eecf0f462b..eecf0f462b 100644
--- a/test/core/security/security_connector_test.c
+++ b/test/core/security/security_connector_test.cc
diff --git a/test/core/security/ssl_server_fuzzer.c b/test/core/security/ssl_server_fuzzer.cc
index f9b754b8f2..9d43a416c3 100644
--- a/test/core/security/ssl_server_fuzzer.c
+++ b/test/core/security/ssl_server_fuzzer.cc
@@ -42,8 +42,9 @@ struct handshake_state {
 
 static void on_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
                               grpc_error *error) {
-  grpc_handshaker_args *args = arg;
-  struct handshake_state *state = args->user_data;
+  grpc_handshaker_args *args = static_cast<grpc_handshaker_args *>(arg);
+  struct handshake_state *state =
+      static_cast<struct handshake_state *>(args->user_data);
   GPR_ASSERT(state->done_callback_called == false);
   state->done_callback_called = true;
   // The fuzzer should not pass the handshake.
diff --git a/test/core/security/verify_jwt.c b/test/core/security/verify_jwt.cc
index cec6fb94b4..c6591cf546 100644
--- a/test/core/security/verify_jwt.c
+++ b/test/core/security/verify_jwt.cc
@@ -47,7 +47,7 @@ static void print_usage_and_exit(gpr_cmdline *cl, const char *argv0) {
 static void on_jwt_verification_done(grpc_exec_ctx *exec_ctx, void *user_data,
                                      grpc_jwt_verifier_status status,
                                      grpc_jwt_claims *claims) {
-  synchronizer *sync = user_data;
+  synchronizer *sync = static_cast<synchronizer *>(user_data);
 
   sync->success = (status == GRPC_JWT_VERIFIER_OK);
   if (sync->success) {
@@ -75,8 +75,8 @@ int main(int argc, char **argv) {
   synchronizer sync;
   grpc_jwt_verifier *verifier;
   gpr_cmdline *cl;
-  char *jwt = NULL;
-  char *aud = NULL;
+  const char *jwt = NULL;
+  const char *aud = NULL;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
   grpc_init();
@@ -92,7 +92,7 @@ int main(int argc, char **argv) {
 
   grpc_init();
 
-  sync.pollset = gpr_zalloc(grpc_pollset_size());
+  sync.pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(sync.pollset, &sync.mu);
   sync.is_done = 0;
 
diff --git a/test/core/slice/b64_test.c b/test/core/slice/b64_test.cc
index bd375aa6a7..bd375aa6a7 100644
--- a/test/core/slice/b64_test.c
+++ b/test/core/slice/b64_test.cc
diff --git a/test/core/slice/percent_decode_fuzzer.c b/test/core/slice/percent_decode_fuzzer.cc
index ad4e3fed7a..ad4e3fed7a 100644
--- a/test/core/slice/percent_decode_fuzzer.c
+++ b/test/core/slice/percent_decode_fuzzer.cc
diff --git a/test/core/slice/percent_encode_fuzzer.c b/test/core/slice/percent_encode_fuzzer.cc
index db3dc3bb3f..db3dc3bb3f 100644
--- a/test/core/slice/percent_encode_fuzzer.c
+++ b/test/core/slice/percent_encode_fuzzer.cc
diff --git a/test/core/slice/percent_encoding_test.c b/test/core/slice/percent_encoding_test.cc
index fcc8d33db3..fcc8d33db3 100644
--- a/test/core/slice/percent_encoding_test.c
+++ b/test/core/slice/percent_encoding_test.cc
diff --git a/test/core/slice/slice_buffer_test.c b/test/core/slice/slice_buffer_test.cc
index 2fba496bd0..2fba496bd0 100644
--- a/test/core/slice/slice_buffer_test.c
+++ b/test/core/slice/slice_buffer_test.cc
diff --git a/test/core/slice/slice_hash_table_test.c b/test/core/slice/slice_hash_table_test.cc
index f3689aac64..a2006b3c10 100644
--- a/test/core/slice/slice_hash_table_test.c
+++ b/test/core/slice/slice_hash_table_test.cc
@@ -28,8 +28,8 @@
 #include "test/core/util/test_config.h"
 
 typedef struct {
-  char* key;
-  char* value;
+  const char* key;
+  const char* value;
 } test_entry;
 
 static void populate_entries(const test_entry* input, size_t num_entries,
@@ -44,7 +44,8 @@ static void check_values(const test_entry* input, size_t num_entries,
                          grpc_slice_hash_table* table) {
   for (size_t i = 0; i < num_entries; ++i) {
     grpc_slice key = grpc_slice_from_static_string(input[i].key);
-    char* actual = grpc_slice_hash_table_get(table, key);
+    const char* actual =
+        static_cast<const char*>(grpc_slice_hash_table_get(table, key));
     GPR_ASSERT(actual != NULL);
     GPR_ASSERT(strcmp(actual, input[i].value) == 0);
     grpc_slice_unref(key);
@@ -67,7 +68,8 @@ static grpc_slice_hash_table* create_table_from_entries(
     int (*value_cmp_fn)(void*, void*)) {
   // Construct table.
   grpc_slice_hash_table_entry* entries =
-      gpr_zalloc(sizeof(*entries) * num_test_entries);
+      static_cast<grpc_slice_hash_table_entry*>(
+          gpr_zalloc(sizeof(*entries) * num_test_entries));
   populate_entries(test_entries, num_test_entries, entries);
   grpc_slice_hash_table* table = grpc_slice_hash_table_create(
       num_test_entries, entries, destroy_string, value_cmp_fn);
@@ -125,8 +127,8 @@ static void test_slice_hash_table() {
 }
 
 static int value_cmp_fn(void* a, void* b) {
-  const char* a_str = a;
-  const char* b_str = b;
+  const char* a_str = static_cast<const char*>(a);
+  const char* b_str = static_cast<const char*>(b);
   return strcmp(a_str, b_str);
 }
 
diff --git a/test/core/slice/slice_string_helpers_test.c b/test/core/slice/slice_string_helpers_test.cc
index 504acf8f84..8877da73f5 100644
--- a/test/core/slice/slice_string_helpers_test.c
+++ b/test/core/slice/slice_string_helpers_test.cc
@@ -67,7 +67,8 @@ static void test_strsplit(void) {
 
   LOG_TEST_NAME("test_strsplit");
 
-  parts = gpr_malloc(sizeof(grpc_slice_buffer));
+  parts =
+      static_cast<grpc_slice_buffer *>(gpr_malloc(sizeof(grpc_slice_buffer)));
   grpc_slice_buffer_init(parts);
 
   str = grpc_slice_from_copied_string("one, two, three, four");
diff --git a/test/core/slice/slice_test.c b/test/core/slice/slice_test.cc
index cda37fb8d9..cda37fb8d9 100644
--- a/test/core/slice/slice_test.c
+++ b/test/core/slice/slice_test.cc
diff --git a/test/core/statistics/census_log_tests.c b/test/core/statistics/census_log_tests.cc
index 229a5e55f9..229a5e55f9 100644
--- a/test/core/statistics/census_log_tests.c
+++ b/test/core/statistics/census_log_tests.cc
diff --git a/test/core/statistics/census_stub_test.c b/test/core/statistics/census_stub_test.cc
index f38d571abd..f38d571abd 100644
--- a/test/core/statistics/census_stub_test.c
+++ b/test/core/statistics/census_stub_test.cc
diff --git a/test/core/statistics/hash_table_test.c b/test/core/statistics/hash_table_test.cc
index d714e15091..d714e15091 100644
--- a/test/core/statistics/hash_table_test.c
+++ b/test/core/statistics/hash_table_test.cc
diff --git a/test/core/statistics/multiple_writers_circular_buffer_test.c b/test/core/statistics/multiple_writers_circular_buffer_test.cc
index 8abd76c3d1..8abd76c3d1 100644
--- a/test/core/statistics/multiple_writers_circular_buffer_test.c
+++ b/test/core/statistics/multiple_writers_circular_buffer_test.cc
diff --git a/test/core/statistics/multiple_writers_test.c b/test/core/statistics/multiple_writers_test.cc
index de800e0d8a..de800e0d8a 100644
--- a/test/core/statistics/multiple_writers_test.c
+++ b/test/core/statistics/multiple_writers_test.cc
diff --git a/test/core/statistics/performance_test.c b/test/core/statistics/performance_test.cc
index 6104acb612..6104acb612 100644
--- a/test/core/statistics/performance_test.c
+++ b/test/core/statistics/performance_test.cc
diff --git a/test/core/statistics/quick_test.c b/test/core/statistics/quick_test.cc
index 1e044b6b59..1e044b6b59 100644
--- a/test/core/statistics/quick_test.c
+++ b/test/core/statistics/quick_test.cc
diff --git a/test/core/statistics/rpc_stats_test.c b/test/core/statistics/rpc_stats_test.cc
index 01ac5a19ab..01ac5a19ab 100644
--- a/test/core/statistics/rpc_stats_test.c
+++ b/test/core/statistics/rpc_stats_test.cc
diff --git a/test/core/statistics/small_log_test.c b/test/core/statistics/small_log_test.cc
index 4bcc35c37e..4bcc35c37e 100644
--- a/test/core/statistics/small_log_test.c
+++ b/test/core/statistics/small_log_test.cc
diff --git a/test/core/statistics/trace_test.c b/test/core/statistics/trace_test.cc
index 63da9f71d3..63da9f71d3 100644
--- a/test/core/statistics/trace_test.c
+++ b/test/core/statistics/trace_test.cc
diff --git a/test/core/statistics/window_stats_test.c b/test/core/statistics/window_stats_test.cc
index 254c14a6a8..254c14a6a8 100644
--- a/test/core/statistics/window_stats_test.c
+++ b/test/core/statistics/window_stats_test.cc
diff --git a/test/core/support/alloc_test.c b/test/core/support/alloc_test.cc
index 088ae7d944..ef9785a275 100644
--- a/test/core/support/alloc_test.c
+++ b/test/core/support/alloc_test.cc
@@ -43,8 +43,9 @@ static void test_custom_allocs() {
 
   /* Restore and check we don't get funky values and that we don't leak */
   gpr_set_allocation_functions(default_fns);
-  GPR_ASSERT((void *)sizeof(*i) != (i = gpr_malloc(sizeof(*i))));
-  GPR_ASSERT((void *)2 != (i = gpr_realloc(i, 2)));
+  GPR_ASSERT((void *)sizeof(*i) !=
+             (i = static_cast<char *>(gpr_malloc(sizeof(*i)))));
+  GPR_ASSERT((void *)2 != (i = static_cast<char *>(gpr_realloc(i, 2))));
   gpr_free(i);
 }
 
diff --git a/test/core/support/arena_test.c b/test/core/support/arena_test.cc
index afb309280f..021bd18f5e 100644
--- a/test/core/support/arena_test.c
+++ b/test/core/support/arena_test.cc
@@ -50,7 +50,7 @@ static void test(const char *name, size_t init_size, const size_t *allocs,
   gpr_free(s);
 
   gpr_arena *a = gpr_arena_create(init_size);
-  void **ps = gpr_zalloc(sizeof(*ps) * nallocs);
+  void **ps = static_cast<void **>(gpr_zalloc(sizeof(*ps) * nallocs));
   for (size_t i = 0; i < nallocs; i++) {
     ps[i] = gpr_arena_alloc(a, allocs[i]);
     // ensure no duplicate results
@@ -81,7 +81,7 @@ typedef struct {
 } concurrent_test_args;
 
 static void concurrent_test_body(void *arg) {
-  concurrent_test_args *a = arg;
+  concurrent_test_args *a = static_cast<concurrent_test_args *>(arg);
   gpr_event_wait(&a->ev_start, gpr_inf_future(GPR_CLOCK_REALTIME));
   for (size_t i = 0; i < concurrent_test_iterations(); i++) {
     *(char *)gpr_arena_alloc(a->arena, 1) = (char)i;
diff --git a/test/core/support/avl_test.c b/test/core/support/avl_test.cc
index 37424d6405..474e773225 100644
--- a/test/core/support/avl_test.c
+++ b/test/core/support/avl_test.cc
@@ -28,7 +28,7 @@
 #include "test/core/util/test_config.h"
 
 static int *box(int x) {
-  int *b = gpr_malloc(sizeof(*b));
+  int *b = static_cast<int *>(gpr_malloc(sizeof(*b)));
   *b = x;
   return b;
 }
diff --git a/test/core/support/cmdline_test.c b/test/core/support/cmdline_test.cc
index 72e7c7f9fc..a3740d4881 100644
--- a/test/core/support/cmdline_test.c
+++ b/test/core/support/cmdline_test.cc
@@ -30,7 +30,8 @@
 static void test_simple_int(void) {
   int x = 1;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "-foo", "3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("-foo"),
+                  const_cast<char *>("3")};
 
   LOG_TEST();
 
@@ -45,7 +46,7 @@ static void test_simple_int(void) {
 static void test_eq_int(void) {
   int x = 1;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "-foo=3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("-foo=3")};
 
   LOG_TEST();
 
@@ -60,7 +61,8 @@ static void test_eq_int(void) {
 static void test_2dash_int(void) {
   int x = 1;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo", "3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo"),
+                  const_cast<char *>("3")};
 
   LOG_TEST();
 
@@ -75,7 +77,7 @@ static void test_2dash_int(void) {
 static void test_2dash_eq_int(void) {
   int x = 1;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo=3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo=3")};
 
   LOG_TEST();
 
@@ -88,9 +90,10 @@ static void test_2dash_eq_int(void) {
 }
 
 static void test_simple_string(void) {
-  char *x = NULL;
+  const char *x = NULL;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "-foo", "3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("-foo"),
+                  const_cast<char *>("3")};
 
   LOG_TEST();
 
@@ -103,9 +106,9 @@ static void test_simple_string(void) {
 }
 
 static void test_eq_string(void) {
-  char *x = NULL;
+  const char *x = NULL;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "-foo=3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("-foo=3")};
 
   LOG_TEST();
 
@@ -118,9 +121,10 @@ static void test_eq_string(void) {
 }
 
 static void test_2dash_string(void) {
-  char *x = NULL;
+  const char *x = NULL;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo", "3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo"),
+                  const_cast<char *>("3")};
 
   LOG_TEST();
 
@@ -133,9 +137,9 @@ static void test_2dash_string(void) {
 }
 
 static void test_2dash_eq_string(void) {
-  char *x = NULL;
+  const char *x = NULL;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo=3"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo=3")};
 
   LOG_TEST();
 
@@ -150,7 +154,7 @@ static void test_2dash_eq_string(void) {
 static void test_flag_on(void) {
   int x = 2;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo")};
 
   LOG_TEST();
 
@@ -165,7 +169,7 @@ static void test_flag_on(void) {
 static void test_flag_no(void) {
   int x = 2;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--no-foo"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--no-foo")};
 
   LOG_TEST();
 
@@ -180,7 +184,7 @@ static void test_flag_no(void) {
 static void test_flag_val_1(void) {
   int x = 2;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo=1"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo=1")};
 
   LOG_TEST();
 
@@ -195,7 +199,7 @@ static void test_flag_val_1(void) {
 static void test_flag_val_0(void) {
   int x = 2;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo=0"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo=0")};
 
   LOG_TEST();
 
@@ -210,7 +214,7 @@ static void test_flag_val_0(void) {
 static void test_flag_val_true(void) {
   int x = 2;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo=true"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo=true")};
 
   LOG_TEST();
 
@@ -225,7 +229,7 @@ static void test_flag_val_true(void) {
 static void test_flag_val_false(void) {
   int x = 2;
   gpr_cmdline *cl;
-  char *args[] = {(char *)__FILE__, "--foo=false"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--foo=false")};
 
   LOG_TEST();
 
@@ -238,12 +242,14 @@ static void test_flag_val_false(void) {
 }
 
 static void test_many(void) {
-  char *str = NULL;
+  const char *str = NULL;
   int x = 0;
   int flag = 2;
   gpr_cmdline *cl;
 
-  char *args[] = {(char *)__FILE__, "--str", "hello", "-x=4", "-no-flag"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--str"),
+                  const_cast<char *>("hello"), const_cast<char *>("-x=4"),
+                  const_cast<char *>("-no-flag")};
 
   LOG_TEST();
 
@@ -259,7 +265,7 @@ static void test_many(void) {
 }
 
 static void extra_arg_cb(void *user_data, const char *arg) {
-  int *count = user_data;
+  int *count = static_cast<int *>(user_data);
   GPR_ASSERT(arg != NULL);
   GPR_ASSERT(strlen(arg) == 1);
   GPR_ASSERT(arg[0] == 'a' + *count);
@@ -269,7 +275,8 @@ static void extra_arg_cb(void *user_data, const char *arg) {
 static void test_extra(void) {
   gpr_cmdline *cl;
   int count = 0;
-  char *args[] = {(char *)__FILE__, "a", "b", "c"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("a"),
+                  const_cast<char *>("b"), const_cast<char *>("c")};
 
   LOG_TEST();
 
@@ -284,7 +291,9 @@ static void test_extra(void) {
 static void test_extra_dashdash(void) {
   gpr_cmdline *cl;
   int count = 0;
-  char *args[] = {(char *)__FILE__, "--", "a", "b", "c"};
+  char *args[] = {(char *)__FILE__, const_cast<char *>("--"),
+                  const_cast<char *>("a"), const_cast<char *>("b"),
+                  const_cast<char *>("c")};
 
   LOG_TEST();
 
@@ -300,7 +309,7 @@ static void test_usage(void) {
   gpr_cmdline *cl;
   char *usage;
 
-  char *str = NULL;
+  const char *str = NULL;
   int x = 0;
   int flag = 2;
 
@@ -331,11 +340,11 @@ static void test_usage(void) {
 static void test_help(void) {
   gpr_cmdline *cl;
 
-  char *str = NULL;
+  const char *str = NULL;
   int x = 0;
   int flag = 2;
 
-  char *help[] = {(char *)__FILE__, "-h"};
+  char *help[] = {(char *)__FILE__, const_cast<char *>("-h")};
 
   LOG_TEST();
 
@@ -355,11 +364,11 @@ static void test_help(void) {
 static void test_badargs1(void) {
   gpr_cmdline *cl;
 
-  char *str = NULL;
+  const char *str = NULL;
   int x = 0;
   int flag = 2;
 
-  char *bad_arg_name[] = {(char *)__FILE__, "--y"};
+  char *bad_arg_name[] = {(char *)__FILE__, const_cast<char *>("--y")};
 
   LOG_TEST();
 
@@ -380,11 +389,12 @@ static void test_badargs1(void) {
 static void test_badargs2(void) {
   gpr_cmdline *cl;
 
-  char *str = NULL;
+  const char *str = NULL;
   int x = 0;
   int flag = 2;
 
-  char *bad_int_value[] = {(char *)__FILE__, "--x", "henry"};
+  char *bad_int_value[] = {(char *)__FILE__, const_cast<char *>("--x"),
+                           const_cast<char *>("henry")};
 
   LOG_TEST();
 
@@ -405,11 +415,12 @@ static void test_badargs2(void) {
 static void test_badargs3(void) {
   gpr_cmdline *cl;
 
-  char *str = NULL;
+  const char *str = NULL;
   int x = 0;
   int flag = 2;
 
-  char *bad_bool_value[] = {(char *)__FILE__, "--flag=henry"};
+  char *bad_bool_value[] = {(char *)__FILE__,
+                            const_cast<char *>("--flag=henry")};
 
   LOG_TEST();
 
@@ -430,11 +441,11 @@ static void test_badargs3(void) {
 static void test_badargs4(void) {
   gpr_cmdline *cl;
 
-  char *str = NULL;
+  const char *str = NULL;
   int x = 0;
   int flag = 2;
 
-  char *bad_bool_value[] = {(char *)__FILE__, "--no-str"};
+  char *bad_bool_value[] = {(char *)__FILE__, const_cast<char *>("--no-str")};
 
   LOG_TEST();
 
diff --git a/test/core/support/cpu_test.c b/test/core/support/cpu_test.cc
index 72db53fa49..7eaf65b110 100644
--- a/test/core/support/cpu_test.c
+++ b/test/core/support/cpu_test.cc
@@ -104,7 +104,7 @@ static void cpu_test(void) {
   ct.ncores = gpr_cpu_num_cores();
   GPR_ASSERT(ct.ncores > 0);
   ct.nthreads = (int)ct.ncores * 3;
-  ct.used = gpr_malloc(ct.ncores * sizeof(int));
+  ct.used = static_cast<int *>(gpr_malloc(ct.ncores * sizeof(int)));
   memset(ct.used, 0, ct.ncores * sizeof(int));
   gpr_mu_init(&ct.mu);
   gpr_cv_init(&ct.done_cv);
diff --git a/test/core/support/env_test.c b/test/core/support/env_test.cc
index 661a546720..661a546720 100644
--- a/test/core/support/env_test.c
+++ b/test/core/support/env_test.cc
diff --git a/test/core/support/histogram_test.c b/test/core/support/histogram_test.cc
index 0ee5d5cdd1..0ee5d5cdd1 100644
--- a/test/core/support/histogram_test.c
+++ b/test/core/support/histogram_test.cc
diff --git a/test/core/support/host_port_test.c b/test/core/support/host_port_test.cc
index 2ff3bcf68e..2ff3bcf68e 100644
--- a/test/core/support/host_port_test.c
+++ b/test/core/support/host_port_test.cc
diff --git a/test/core/support/log_test.c b/test/core/support/log_test.cc
index c221ff6783..c221ff6783 100644
--- a/test/core/support/log_test.c
+++ b/test/core/support/log_test.cc
diff --git a/test/core/support/mpscq_test.c b/test/core/support/mpscq_test.cc
index 5e7dc9fca5..a4fa6a3e34 100644
--- a/test/core/support/mpscq_test.c
+++ b/test/core/support/mpscq_test.cc
@@ -34,7 +34,7 @@ typedef struct test_node {
 } test_node;
 
 static test_node *new_node(size_t i, size_t *ctr) {
-  test_node *n = gpr_malloc(sizeof(test_node));
+  test_node *n = static_cast<test_node *>(gpr_malloc(sizeof(test_node)));
   n->i = i;
   n->ctr = ctr;
   return n;
@@ -64,7 +64,7 @@ typedef struct {
 #define THREAD_ITERATIONS 10000
 
 static void test_thread(void *args) {
-  thd_args *a = args;
+  thd_args *a = static_cast<thd_args *>(args);
   gpr_event_wait(a->start, gpr_inf_future(GPR_CLOCK_REALTIME));
   for (size_t i = 1; i <= THREAD_ITERATIONS; i++) {
     gpr_mpscq_push(a->q, &new_node(i, &a->ctr)->node);
@@ -119,7 +119,7 @@ typedef struct {
 } pull_args;
 
 static void pull_thread(void *arg) {
-  pull_args *pa = arg;
+  pull_args *pa = static_cast<pull_args *>(arg);
   gpr_event_wait(pa->start, gpr_inf_future(GPR_CLOCK_REALTIME));
 
   for (;;) {
diff --git a/test/core/support/murmur_hash_test.c b/test/core/support/murmur_hash_test.cc
index 5677515d04..5677515d04 100644
--- a/test/core/support/murmur_hash_test.c
+++ b/test/core/support/murmur_hash_test.cc
diff --git a/test/core/support/spinlock_test.c b/test/core/support/spinlock_test.cc
index b236a88ab7..8c8c8cedfa 100644
--- a/test/core/support/spinlock_test.c
+++ b/test/core/support/spinlock_test.cc
@@ -43,9 +43,10 @@ struct test {
 
 /* Return pointer to a new struct test. */
 static struct test *test_new(int threads, int64_t iterations, int incr_step) {
-  struct test *m = gpr_malloc(sizeof(*m));
+  struct test *m = static_cast<struct test *>(gpr_malloc(sizeof(*m)));
   m->thread_count = threads;
-  m->threads = gpr_malloc(sizeof(*m->threads) * (size_t)threads);
+  m->threads = static_cast<gpr_thd_id *>(
+      gpr_malloc(sizeof(*m->threads) * (size_t)threads));
   m->iterations = iterations;
   m->counter = 0;
   m->thread_count = 0;
@@ -113,7 +114,7 @@ static void test(const char *name, void (*body)(void *m), int timeout_s,
 
 /* Increment m->counter on each iteration; then mark thread as done.  */
 static void inc(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations; i++) {
     gpr_spinlock_lock(&m->mu);
@@ -125,7 +126,7 @@ static void inc(void *v /*=m*/) {
 /* Increment m->counter under lock acquired with trylock, m->iterations times;
    then mark thread as done.  */
 static void inctry(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations;) {
     if (gpr_spinlock_trylock(&m->mu)) {
diff --git a/test/core/support/stack_lockfree_test.c b/test/core/support/stack_lockfree_test.cc
index 4b1f60ce01..4b1f60ce01 100644
--- a/test/core/support/stack_lockfree_test.c
+++ b/test/core/support/stack_lockfree_test.cc
diff --git a/test/core/support/string_test.c b/test/core/support/string_test.cc
index bee2139477..bee2139477 100644
--- a/test/core/support/string_test.c
+++ b/test/core/support/string_test.cc
diff --git a/test/core/support/sync_test.c b/test/core/support/sync_test.cc
index 178d77edcd..c005a2bbb1 100644
--- a/test/core/support/sync_test.c
+++ b/test/core/support/sync_test.cc
@@ -157,7 +157,7 @@ struct test {
 
 /* Return pointer to a new struct test. */
 static struct test *test_new(int threads, int64_t iterations, int incr_step) {
-  struct test *m = gpr_malloc(sizeof(*m));
+  struct test *m = static_cast<struct test *>(gpr_malloc(sizeof(*m)));
   m->threads = threads;
   m->iterations = iterations;
   m->counter = 0;
@@ -263,7 +263,7 @@ static void test(const char *name, void (*body)(void *m),
 
 /* Increment m->counter on each iteration; then mark thread as done.  */
 static void inc(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations; i++) {
     gpr_mu_lock(&m->mu);
@@ -276,7 +276,7 @@ static void inc(void *v /*=m*/) {
 /* Increment m->counter under lock acquired with trylock, m->iterations times;
    then mark thread as done.  */
 static void inctry(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations;) {
     if (gpr_mu_trylock(&m->mu)) {
@@ -291,7 +291,7 @@ static void inctry(void *v /*=m*/) {
 /* Increment counter only when (m->counter%m->threads)==m->thread_id; then mark
    thread as done.  */
 static void inc_by_turns(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   int id = thread_id(m);
   for (i = 0; i != m->iterations; i++) {
@@ -309,7 +309,7 @@ static void inc_by_turns(void *v /*=m*/) {
 /* Wait a millisecond and increment counter on each iteration;
    then mark thread as done. */
 static void inc_with_1ms_delay(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations; i++) {
     gpr_timespec deadline;
@@ -327,7 +327,7 @@ static void inc_with_1ms_delay(void *v /*=m*/) {
 /* Wait a millisecond and increment counter on each iteration, using an event
    for timing; then mark thread as done. */
 static void inc_with_1ms_delay_event(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations; i++) {
     gpr_timespec deadline;
@@ -345,7 +345,7 @@ static void inc_with_1ms_delay_event(void *v /*=m*/) {
    Even threads use queue_append(), and odd threads use queue_try_append()
    until it succeeds. */
 static void many_producers(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   int x = thread_id(m);
   if ((x & 1) == 0) {
@@ -365,7 +365,7 @@ static void many_producers(void *v /*=m*/) {
    wait an extra second to confirm that no more elements are arriving,
    then mark thread as done. */
 static void consumer(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t n = m->iterations * m->threads;
   int64_t i;
   int value;
@@ -385,7 +385,7 @@ static void consumer(void *v /*=m*/) {
 /* Increment m->stats_counter m->iterations times, transfer counter value to
    m->counter, then mark thread as done.  */
 static void statsinc(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations; i++) {
     gpr_stats_inc(&m->stats_counter, 1);
@@ -400,7 +400,7 @@ static void statsinc(void *v /*=m*/) {
    m->thread_refcount once, and if it reaches zero, set m->event to (void*)1;
    then mark thread as done.  */
 static void refinc(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t i;
   for (i = 0; i != m->iterations; i++) {
     if (m->incr_step == 1) {
@@ -419,7 +419,7 @@ static void refinc(void *v /*=m*/) {
    (m->threads * m->iterations * m->incr_step) times, and ensure that the last
    decrement caused the counter to reach zero, then mark thread as done.  */
 static void refcheck(void *v /*=m*/) {
-  struct test *m = v;
+  struct test *m = static_cast<struct test *>(v);
   int64_t n = m->iterations * m->threads * m->incr_step;
   int64_t i;
   GPR_ASSERT(gpr_event_wait(&m->event, gpr_inf_future(GPR_CLOCK_REALTIME)) ==
diff --git a/test/core/support/thd_test.c b/test/core/support/thd_test.cc
index 2c578a242c..e6b4ea405b 100644
--- a/test/core/support/thd_test.c
+++ b/test/core/support/thd_test.cc
@@ -37,7 +37,7 @@ struct test {
 
 /* A Thread body.   Decrement t->n, and if is becomes zero, set t->done. */
 static void thd_body(void *v) {
-  struct test *t = v;
+  struct test *t = static_cast<struct test *>(v);
   gpr_mu_lock(&t->mu);
   t->n--;
   if (t->n == 0) {
diff --git a/test/core/support/time_test.c b/test/core/support/time_test.cc
index 74b5ef6114..74b5ef6114 100644
--- a/test/core/support/time_test.c
+++ b/test/core/support/time_test.cc
diff --git a/test/core/support/tls_test.c b/test/core/support/tls_test.cc
index 5529d5cf59..5529d5cf59 100644
--- a/test/core/support/tls_test.c
+++ b/test/core/support/tls_test.cc
diff --git a/test/core/support/useful_test.c b/test/core/support/useful_test.cc
index 2f84f485fc..2f84f485fc 100644
--- a/test/core/support/useful_test.c
+++ b/test/core/support/useful_test.cc
diff --git a/test/core/surface/alarm_test.c b/test/core/surface/alarm_test.cc
index 4fd7cb93c6..4fd7cb93c6 100644
--- a/test/core/surface/alarm_test.c
+++ b/test/core/surface/alarm_test.cc
diff --git a/test/core/surface/byte_buffer_reader_test.c b/test/core/surface/byte_buffer_reader_test.cc
index a6b4c86abc..a6b4c86abc 100644
--- a/test/core/surface/byte_buffer_reader_test.c
+++ b/test/core/surface/byte_buffer_reader_test.cc
diff --git a/test/core/surface/channel_create_test.c b/test/core/surface/channel_create_test.cc
index a6884750e7..a6884750e7 100644
--- a/test/core/surface/channel_create_test.c
+++ b/test/core/surface/channel_create_test.cc
diff --git a/test/core/surface/completion_queue_test.c b/test/core/surface/completion_queue_test.cc
index e6372a379c..e6372a379c 100644
--- a/test/core/surface/completion_queue_test.c
+++ b/test/core/surface/completion_queue_test.cc
diff --git a/test/core/surface/completion_queue_threading_test.c b/test/core/surface/completion_queue_threading_test.cc
index 9996b6b840..abe119789f 100644
--- a/test/core/surface/completion_queue_threading_test.c
+++ b/test/core/surface/completion_queue_threading_test.cc
@@ -68,7 +68,7 @@ struct thread_state {
 };
 
 static void pluck_one(void *arg) {
-  struct thread_state *state = arg;
+  struct thread_state *state = static_cast<struct thread_state *>(arg);
   grpc_completion_queue_pluck(state->cc, state->tag,
                               gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 }
@@ -143,7 +143,7 @@ static void free_completion(grpc_exec_ctx *exec_ctx, void *arg,
 }
 
 static void producer_thread(void *arg) {
-  test_thread_options *opt = arg;
+  test_thread_options *opt = static_cast<test_thread_options *>(arg);
   int i;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
 
@@ -164,7 +164,8 @@ static void producer_thread(void *arg) {
   for (i = 0; i < TEST_THREAD_EVENTS; i++) {
     grpc_cq_end_op(&exec_ctx, opt->cc, (void *)(intptr_t)1, GRPC_ERROR_NONE,
                    free_completion, NULL,
-                   gpr_malloc(sizeof(grpc_cq_completion)));
+                   static_cast<grpc_cq_completion *>(
+                       gpr_malloc(sizeof(grpc_cq_completion))));
     opt->events_triggered++;
     grpc_exec_ctx_finish(&exec_ctx);
   }
@@ -175,7 +176,7 @@ static void producer_thread(void *arg) {
 }
 
 static void consumer_thread(void *arg) {
-  test_thread_options *opt = arg;
+  test_thread_options *opt = static_cast<test_thread_options *>(arg);
   grpc_event ev;
 
   gpr_log(GPR_INFO, "consumer %d started", opt->id);
@@ -209,8 +210,8 @@ static void consumer_thread(void *arg) {
 }
 
 static void test_threading(size_t producers, size_t consumers) {
-  test_thread_options *options =
-      gpr_malloc((producers + consumers) * sizeof(test_thread_options));
+  test_thread_options *options = static_cast<test_thread_options *>(
+      gpr_malloc((producers + consumers) * sizeof(test_thread_options)));
   gpr_event phase1 = GPR_EVENT_INIT;
   gpr_event phase2 = GPR_EVENT_INIT;
   grpc_completion_queue *cc = grpc_completion_queue_create_for_next(NULL);
diff --git a/test/core/surface/concurrent_connectivity_test.c b/test/core/surface/concurrent_connectivity_test.cc
index 3595885ff6..303180c0d1 100644
--- a/test/core/surface/concurrent_connectivity_test.c
+++ b/test/core/surface/concurrent_connectivity_test.cc
@@ -158,7 +158,7 @@ void bad_server_thread(void *vargs) {
 
 static void done_pollset_shutdown(grpc_exec_ctx *exec_ctx, void *pollset,
                                   grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, pollset);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(pollset));
   gpr_free(pollset);
 }
 
@@ -211,7 +211,7 @@ int run_concurrent_connectivity_test() {
 
   /* Third round, bogus tcp server */
   gpr_log(GPR_DEBUG, "Wave 3");
-  args.pollset = gpr_zalloc(grpc_pollset_size());
+  args.pollset = static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(args.pollset, &args.mu);
   gpr_event_init(&args.ready);
   gpr_thd_new(&server, bad_server_thread, &args, &options);
diff --git a/test/core/surface/init_test.c b/test/core/surface/init_test.cc
index b835a2a884..b835a2a884 100644
--- a/test/core/surface/init_test.c
+++ b/test/core/surface/init_test.cc
diff --git a/test/core/surface/invalid_channel_args_test.c b/test/core/surface/invalid_channel_args_test.cc
index 9c84c30f03..e6099d4fca 100644
--- a/test/core/surface/invalid_channel_args_test.c
+++ b/test/core/surface/invalid_channel_args_test.cc
@@ -75,7 +75,7 @@ static void test_default_authority_type(void) {
   char *expected_error_message;
 
   client_arg.type = GRPC_ARG_INTEGER;
-  client_arg.key = GRPC_ARG_DEFAULT_AUTHORITY;
+  client_arg.key = const_cast<char *>(GRPC_ARG_DEFAULT_AUTHORITY);
   client_arg.value.integer = 0;
 
   client_args.num_args = 1;
@@ -91,7 +91,7 @@ static void test_ssl_name_override_type(void) {
   char *expected_error_message;
 
   client_arg.type = GRPC_ARG_INTEGER;
-  client_arg.key = GRPC_SSL_TARGET_NAME_OVERRIDE_ARG;
+  client_arg.key = const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG);
   client_arg.value.integer = 0;
 
   client_args.num_args = 1;
@@ -107,11 +107,11 @@ static void test_ssl_name_override_failed(void) {
   char *expected_error_message;
 
   client_arg[0].type = GRPC_ARG_STRING;
-  client_arg[0].key = GRPC_ARG_DEFAULT_AUTHORITY;
-  client_arg[0].value.string = "default";
+  client_arg[0].key = const_cast<char *>(GRPC_ARG_DEFAULT_AUTHORITY);
+  client_arg[0].value.string = const_cast<char *>("default");
   client_arg[1].type = GRPC_ARG_STRING;
-  client_arg[1].key = GRPC_SSL_TARGET_NAME_OVERRIDE_ARG;
-  client_arg[1].value.string = "ssl";
+  client_arg[1].key = const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG);
+  client_arg[1].value.string = const_cast<char *>("ssl");
 
   client_args.num_args = 2;
   client_args.args = client_arg;
diff --git a/test/core/surface/lame_client_test.c b/test/core/surface/lame_client_test.cc
index f623e1a743..6d563d2f1f 100644
--- a/test/core/surface/lame_client_test.c
+++ b/test/core/surface/lame_client_test.cc
@@ -34,7 +34,7 @@ static void *tag(intptr_t x) { return (void *)x; }
 
 void verify_connectivity(grpc_exec_ctx *exec_ctx, void *arg,
                          grpc_error *error) {
-  grpc_connectivity_state *state = arg;
+  grpc_connectivity_state *state = static_cast<grpc_connectivity_state *>(arg);
   GPR_ASSERT(GRPC_CHANNEL_SHUTDOWN == *state);
   GPR_ASSERT(error == GRPC_ERROR_NONE);
 }
diff --git a/test/core/surface/num_external_connectivity_watchers_test.c b/test/core/surface/num_external_connectivity_watchers_test.cc
index 16401bb7ac..f5f09b38e2 100644
--- a/test/core/surface/num_external_connectivity_watchers_test.c
+++ b/test/core/surface/num_external_connectivity_watchers_test.cc
@@ -168,9 +168,10 @@ static const test_fixture insecure_test = {
 static grpc_channel *secure_test_create_channel(const char *addr) {
   grpc_channel_credentials *ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, NULL, NULL);
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(NULL, &ssl_name_override, 1);
   grpc_channel *channel =
diff --git a/test/core/surface/secure_channel_create_test.c b/test/core/surface/secure_channel_create_test.cc
index 0c45135501..ccb58ee793 100644
--- a/test/core/surface/secure_channel_create_test.c
+++ b/test/core/surface/secure_channel_create_test.cc
@@ -47,7 +47,7 @@ void test_security_connector_already_in_arg(void) {
   grpc_arg arg;
   arg.type = GRPC_ARG_POINTER;
   arg.value.pointer.p = NULL;
-  arg.key = GRPC_ARG_SECURITY_CONNECTOR;
+  arg.key = const_cast<char *>(GRPC_ARG_SECURITY_CONNECTOR);
   grpc_channel_args args;
   args.num_args = 1;
   args.args = &arg;
diff --git a/test/core/surface/sequential_connectivity_test.c b/test/core/surface/sequential_connectivity_test.cc
index d5fd2db81b..6596a3a0ce 100644
--- a/test/core/surface/sequential_connectivity_test.c
+++ b/test/core/surface/sequential_connectivity_test.cc
@@ -43,7 +43,7 @@ typedef struct {
 } server_thread_args;
 
 static void server_thread_func(void *args) {
-  server_thread_args *a = args;
+  server_thread_args *a = static_cast<server_thread_args *>(args);
   grpc_event ev = grpc_completion_queue_next(
       a->cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
   GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
@@ -145,9 +145,10 @@ static void secure_test_add_port(grpc_server *server, const char *addr) {
 static grpc_channel *secure_test_create_channel(const char *addr) {
   grpc_channel_credentials *ssl_creds =
       grpc_ssl_credentials_create(test_root_cert, NULL, NULL);
-  grpc_arg ssl_name_override = {GRPC_ARG_STRING,
-                                GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
-                                {"foo.test.google.fr"}};
+  grpc_arg ssl_name_override = {
+      GRPC_ARG_STRING,
+      const_cast<char *>(GRPC_SSL_TARGET_NAME_OVERRIDE_ARG),
+      {const_cast<char *>("foo.test.google.fr")}};
   grpc_channel_args *new_client_args =
       grpc_channel_args_copy_and_add(NULL, &ssl_name_override, 1);
   grpc_channel *channel =
diff --git a/test/core/surface/server_chttp2_test.c b/test/core/surface/server_chttp2_test.cc
index cd8931e0d7..ecd5314b83 100644
--- a/test/core/surface/server_chttp2_test.c
+++ b/test/core/surface/server_chttp2_test.cc
@@ -39,7 +39,7 @@ void test_unparsable_target(void) {
 void test_add_same_port_twice() {
   grpc_arg a;
   a.type = GRPC_ARG_INTEGER;
-  a.key = GRPC_ARG_ALLOW_REUSEPORT;
+  a.key = const_cast<char *>(GRPC_ARG_ALLOW_REUSEPORT);
   a.value.integer = 0;
   grpc_channel_args args = {1, &a};
 
diff --git a/test/core/surface/server_test.c b/test/core/surface/server_test.cc
index 4c185cd8ea..08b8dca4d7 100644
--- a/test/core/surface/server_test.c
+++ b/test/core/surface/server_test.cc
@@ -69,7 +69,7 @@ void test_request_call_on_no_server_cq(void) {
 void test_bind_server_twice(void) {
   grpc_arg a;
   a.type = GRPC_ARG_INTEGER;
-  a.key = GRPC_ARG_ALLOW_REUSEPORT;
+  a.key = const_cast<char *>(GRPC_ARG_ALLOW_REUSEPORT);
   a.value.integer = 0;
   grpc_channel_args args = {1, &a};
 
diff --git a/test/core/transport/byte_stream_test.c b/test/core/transport/byte_stream_test.cc
index a0c5f961cf..a0c5f961cf 100644
--- a/test/core/transport/byte_stream_test.c
+++ b/test/core/transport/byte_stream_test.cc
diff --git a/test/core/transport/chttp2/alpn_test.c b/test/core/transport/chttp2/alpn_test.cc
index 72c30c40eb..72c30c40eb 100644
--- a/test/core/transport/chttp2/alpn_test.c
+++ b/test/core/transport/chttp2/alpn_test.cc
diff --git a/test/core/transport/chttp2/bin_decoder_test.c b/test/core/transport/chttp2/bin_decoder_test.cc
index 775161ec91..a09aadb18d 100644
--- a/test/core/transport/chttp2/bin_decoder_test.c
+++ b/test/core/transport/chttp2/bin_decoder_test.cc
@@ -30,7 +30,7 @@
 static int all_ok = 1;
 
 static void expect_slice_eq(grpc_exec_ctx *exec_ctx, grpc_slice expected,
-                            grpc_slice slice, char *debug, int line) {
+                            grpc_slice slice, const char *debug, int line) {
   if (!grpc_slice_eq(slice, expected)) {
     char *hs = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char *he = grpc_dump_slice(expected, GPR_DUMP_HEX | GPR_DUMP_ASCII);
diff --git a/test/core/transport/chttp2/bin_encoder_test.c b/test/core/transport/chttp2/bin_encoder_test.cc
index acadcf6c89..d073f74d27 100644
--- a/test/core/transport/chttp2/bin_encoder_test.c
+++ b/test/core/transport/chttp2/bin_encoder_test.cc
@@ -31,8 +31,8 @@
 
 static int all_ok = 1;
 
-static void expect_slice_eq(grpc_slice expected, grpc_slice slice, char *debug,
-                            int line) {
+static void expect_slice_eq(grpc_slice expected, grpc_slice slice,
+                            const char *debug, int line) {
   if (!grpc_slice_eq(slice, expected)) {
     char *hs = grpc_dump_slice(slice, GPR_DUMP_HEX | GPR_DUMP_ASCII);
     char *he = grpc_dump_slice(expected, GPR_DUMP_HEX | GPR_DUMP_ASCII);
diff --git a/test/core/transport/chttp2/hpack_encoder_test.c b/test/core/transport/chttp2/hpack_encoder_test.cc
index a2af83b6cb..b203df1892 100644
--- a/test/core/transport/chttp2/hpack_encoder_test.c
+++ b/test/core/transport/chttp2/hpack_encoder_test.cc
@@ -58,7 +58,8 @@ static void verify(grpc_exec_ctx *exec_ctx, const verify_params params,
   grpc_slice expect = parse_hexstring(expected);
   size_t i;
   va_list l;
-  grpc_linked_mdelem *e = gpr_malloc(sizeof(*e) * nheaders);
+  grpc_linked_mdelem *e =
+      static_cast<grpc_linked_mdelem *>(gpr_malloc(sizeof(*e) * nheaders));
   grpc_metadata_batch b;
 
   grpc_metadata_batch_init(&b);
@@ -89,7 +90,8 @@ static void verify(grpc_exec_ctx *exec_ctx, const verify_params params,
 
   if (cap_to_delete == num_to_delete) {
     cap_to_delete = GPR_MAX(2 * cap_to_delete, 1000);
-    to_delete = gpr_realloc(to_delete, sizeof(*to_delete) * cap_to_delete);
+    to_delete = static_cast<void **>(
+        gpr_realloc(to_delete, sizeof(*to_delete) * cap_to_delete));
   }
   to_delete[num_to_delete++] = e;
 
@@ -209,7 +211,8 @@ static void verify_table_size_change_match_elem_size(grpc_exec_ctx *exec_ctx,
       grpc_slice_intern(grpc_slice_from_static_string(value)));
   size_t elem_size = grpc_mdelem_get_size_in_hpack_table(elem, use_true_binary);
   size_t initial_table_size = g_compressor.table_size;
-  grpc_linked_mdelem *e = gpr_malloc(sizeof(*e));
+  grpc_linked_mdelem *e =
+      static_cast<grpc_linked_mdelem *>(gpr_malloc(sizeof(*e)));
   grpc_metadata_batch b;
   grpc_metadata_batch_init(&b);
   e[0].md = elem;
diff --git a/test/core/transport/chttp2/hpack_parser_fuzzer_test.c b/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
index 03834084cb..03834084cb 100644
--- a/test/core/transport/chttp2/hpack_parser_fuzzer_test.c
+++ b/test/core/transport/chttp2/hpack_parser_fuzzer_test.cc
diff --git a/test/core/transport/chttp2/hpack_parser_test.c b/test/core/transport/chttp2/hpack_parser_test.cc
index 0946c05261..27b4a1c2c0 100644
--- a/test/core/transport/chttp2/hpack_parser_test.c
+++ b/test/core/transport/chttp2/hpack_parser_test.cc
@@ -32,7 +32,7 @@ typedef struct { va_list args; } test_checker;
 
 static void onhdr(grpc_exec_ctx *exec_ctx, void *ud, grpc_mdelem md) {
   const char *ekey, *evalue;
-  test_checker *chk = ud;
+  test_checker *chk = static_cast<test_checker *>(ud);
   ekey = va_arg(chk->args, char *);
   GPR_ASSERT(ekey);
   evalue = va_arg(chk->args, char *);
diff --git a/test/core/transport/chttp2/hpack_table_test.c b/test/core/transport/chttp2/hpack_table_test.cc
index 430ece33c7..430ece33c7 100644
--- a/test/core/transport/chttp2/hpack_table_test.c
+++ b/test/core/transport/chttp2/hpack_table_test.cc
diff --git a/test/core/transport/chttp2/stream_map_test.c b/test/core/transport/chttp2/stream_map_test.cc
index ae2583ab84..7df7b1b2a6 100644
--- a/test/core/transport/chttp2/stream_map_test.c
+++ b/test/core/transport/chttp2/stream_map_test.cc
@@ -92,7 +92,7 @@ static void test_basic_add_find(uint32_t n) {
 
 /* verify that for_each gets the right values during test_delete_evens_XXX */
 static void verify_for_each(void *user_data, uint32_t stream_id, void *ptr) {
-  uint32_t *for_each_check = user_data;
+  uint32_t *for_each_check = static_cast<uint32_t *>(user_data);
   GPR_ASSERT(ptr);
   GPR_ASSERT(*for_each_check == stream_id);
   *for_each_check += 2;
diff --git a/test/core/transport/chttp2/varint_test.c b/test/core/transport/chttp2/varint_test.cc
index 0986a2cde6..0986a2cde6 100644
--- a/test/core/transport/chttp2/varint_test.c
+++ b/test/core/transport/chttp2/varint_test.cc
diff --git a/test/core/transport/connectivity_state_test.c b/test/core/transport/connectivity_state_test.cc
index 4ef8683107..4ef8683107 100644
--- a/test/core/transport/connectivity_state_test.c
+++ b/test/core/transport/connectivity_state_test.cc
diff --git a/test/core/transport/metadata_test.c b/test/core/transport/metadata_test.cc
index f7124d29a7..e043078560 100644
--- a/test/core/transport/metadata_test.c
+++ b/test/core/transport/metadata_test.cc
@@ -114,7 +114,8 @@ static void test_create_many_ephemeral_metadata(bool intern_keys,
 static void test_create_many_persistant_metadata(void) {
   char buffer[GPR_LTOA_MIN_BUFSIZE];
   long i;
-  grpc_mdelem *created = gpr_malloc(sizeof(grpc_mdelem) * MANY);
+  grpc_mdelem *created =
+      static_cast<grpc_mdelem *>(gpr_malloc(sizeof(grpc_mdelem) * MANY));
   grpc_mdelem md;
 
   gpr_log(GPR_INFO, "test_create_many_persistant_metadata");
@@ -226,8 +227,9 @@ static void test_things_stick_around(void) {
   size_t i, j;
   char *buffer;
   size_t nstrs = 1000;
-  grpc_slice *strs = gpr_malloc(sizeof(grpc_slice) * nstrs);
-  size_t *shuf = gpr_malloc(sizeof(size_t) * nstrs);
+  grpc_slice *strs =
+      static_cast<grpc_slice *>(gpr_malloc(sizeof(grpc_slice) * nstrs));
+  size_t *shuf = static_cast<size_t *>(gpr_malloc(sizeof(size_t) * nstrs));
   grpc_slice test;
 
   gpr_log(GPR_INFO, "test_things_stick_around");
@@ -281,9 +283,9 @@ static void test_user_data_works(void) {
 
   grpc_init();
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  ud1 = gpr_malloc(sizeof(int));
+  ud1 = static_cast<int *>(gpr_malloc(sizeof(int)));
   *ud1 = 1;
-  ud2 = gpr_malloc(sizeof(int));
+  ud2 = static_cast<int *>(gpr_malloc(sizeof(int)));
   *ud2 = 2;
   md = grpc_mdelem_from_slices(
       &exec_ctx, grpc_slice_intern(grpc_slice_from_static_string("abc")),
diff --git a/test/core/transport/status_conversion_test.c b/test/core/transport/status_conversion_test.cc
index de8fa4458a..de8fa4458a 100644
--- a/test/core/transport/status_conversion_test.c
+++ b/test/core/transport/status_conversion_test.cc
diff --git a/test/core/transport/stream_owned_slice_test.c b/test/core/transport/stream_owned_slice_test.cc
index 774ad4e72e..774ad4e72e 100644
--- a/test/core/transport/stream_owned_slice_test.c
+++ b/test/core/transport/stream_owned_slice_test.cc
diff --git a/test/core/transport/timeout_encoding_test.c b/test/core/transport/timeout_encoding_test.cc
index 30357faed3..30357faed3 100644
--- a/test/core/transport/timeout_encoding_test.c
+++ b/test/core/transport/timeout_encoding_test.cc
diff --git a/test/core/tsi/fake_transport_security_test.c b/test/core/tsi/fake_transport_security_test.cc
index 11be8802b7..6561028860 100644
--- a/test/core/tsi/fake_transport_security_test.c
+++ b/test/core/tsi/fake_transport_security_test.cc
@@ -64,7 +64,8 @@ static const struct tsi_test_fixture_vtable vtable = {
     fake_test_destruct};
 
 static tsi_test_fixture *fake_tsi_test_fixture_create() {
-  fake_tsi_test_fixture *fake_fixture = gpr_zalloc(sizeof(*fake_fixture));
+  fake_tsi_test_fixture *fake_fixture =
+      static_cast<fake_tsi_test_fixture *>(gpr_zalloc(sizeof(*fake_fixture)));
   tsi_test_fixture_init(&fake_fixture->base);
   fake_fixture->base.vtable = &vtable;
   return &fake_fixture->base;
@@ -91,8 +92,8 @@ void fake_tsi_test_do_handshake() {
 }
 
 void fake_tsi_test_do_round_trip_for_all_configs() {
-  unsigned int *bit_array =
-      gpr_zalloc(sizeof(unsigned int) * TSI_TEST_NUM_OF_ARGUMENTS);
+  unsigned int *bit_array = static_cast<unsigned int *>(
+      gpr_zalloc(sizeof(unsigned int) * TSI_TEST_NUM_OF_ARGUMENTS));
   const unsigned int mask = 1U << (TSI_TEST_NUM_OF_ARGUMENTS - 1);
   for (unsigned int val = 0; val < TSI_TEST_NUM_OF_COMBINATIONS; val++) {
     unsigned int v = val;
diff --git a/test/core/tsi/ssl_transport_security_test.c b/test/core/tsi/ssl_transport_security_test.cc
index 2399b054b1..27b2049dd8 100644
--- a/test/core/tsi/ssl_transport_security_test.c
+++ b/test/core/tsi/ssl_transport_security_test.cc
@@ -326,8 +326,8 @@ static const struct tsi_test_fixture_vtable vtable = {
     ssl_test_destruct};
 
 static char *load_file(const char *dir_path, const char *file_name) {
-  char *file_path =
-      gpr_zalloc(sizeof(char) * (strlen(dir_path) + strlen(file_name) + 1));
+  char *file_path = static_cast<char *>(
+      gpr_zalloc(sizeof(char) * (strlen(dir_path) + strlen(file_name) + 1)));
   memcpy(file_path, dir_path, strlen(dir_path));
   memcpy(file_path + strlen(dir_path), file_name, strlen(file_name));
   grpc_slice slice;
@@ -339,12 +339,14 @@ static char *load_file(const char *dir_path, const char *file_name) {
 }
 
 static tsi_test_fixture *ssl_tsi_test_fixture_create() {
-  ssl_tsi_test_fixture *ssl_fixture = gpr_zalloc(sizeof(*ssl_fixture));
+  ssl_tsi_test_fixture *ssl_fixture =
+      static_cast<ssl_tsi_test_fixture *>(gpr_zalloc(sizeof(*ssl_fixture)));
   tsi_test_fixture_init(&ssl_fixture->base);
   ssl_fixture->base.test_unused_bytes = false;
   ssl_fixture->base.vtable = &vtable;
   /* Create ssl_key_cert_lib. */
-  ssl_key_cert_lib *key_cert_lib = gpr_zalloc(sizeof(*key_cert_lib));
+  ssl_key_cert_lib *key_cert_lib =
+      static_cast<ssl_key_cert_lib *>(gpr_zalloc(sizeof(*key_cert_lib)));
   key_cert_lib->use_bad_server_cert = false;
   key_cert_lib->use_bad_client_cert = false;
   key_cert_lib->server_num_key_cert_pairs =
@@ -352,11 +354,13 @@ static tsi_test_fixture *ssl_tsi_test_fixture_create() {
   key_cert_lib->bad_server_num_key_cert_pairs =
       SSL_TSI_TEST_BAD_SERVER_KEY_CERT_PAIRS_NUM;
   key_cert_lib->server_pem_key_cert_pairs =
-      gpr_malloc(sizeof(tsi_ssl_pem_key_cert_pair) *
-                 key_cert_lib->server_num_key_cert_pairs);
+      static_cast<tsi_ssl_pem_key_cert_pair *>(
+          gpr_malloc(sizeof(tsi_ssl_pem_key_cert_pair) *
+                     key_cert_lib->server_num_key_cert_pairs));
   key_cert_lib->bad_server_pem_key_cert_pairs =
-      gpr_malloc(sizeof(tsi_ssl_pem_key_cert_pair) *
-                 key_cert_lib->bad_server_num_key_cert_pairs);
+      static_cast<tsi_ssl_pem_key_cert_pair *>(
+          gpr_malloc(sizeof(tsi_ssl_pem_key_cert_pair) *
+                     key_cert_lib->bad_server_num_key_cert_pairs));
   key_cert_lib->server_pem_key_cert_pairs[0].private_key =
       load_file(SSL_TSI_TEST_CREDENTIALS_DIR, "server0.key");
   key_cert_lib->server_pem_key_cert_pairs[0].cert_chain =
@@ -380,11 +384,12 @@ static tsi_test_fixture *ssl_tsi_test_fixture_create() {
   key_cert_lib->root_cert = load_file(SSL_TSI_TEST_CREDENTIALS_DIR, "ca.pem");
   ssl_fixture->key_cert_lib = key_cert_lib;
   /* Create ssl_alpn_lib. */
-  ssl_alpn_lib *alpn_lib = gpr_zalloc(sizeof(*alpn_lib));
+  ssl_alpn_lib *alpn_lib =
+      static_cast<ssl_alpn_lib *>(gpr_zalloc(sizeof(*alpn_lib)));
   alpn_lib->server_alpn_protocols =
-      gpr_zalloc(sizeof(char *) * SSL_TSI_TEST_ALPN_NUM);
+      static_cast<char **>(gpr_zalloc(sizeof(char *) * SSL_TSI_TEST_ALPN_NUM));
   alpn_lib->client_alpn_protocols =
-      gpr_zalloc(sizeof(char *) * SSL_TSI_TEST_ALPN_NUM);
+      static_cast<char **>(gpr_zalloc(sizeof(char *) * SSL_TSI_TEST_ALPN_NUM));
   alpn_lib->server_alpn_protocols[0] = gpr_strdup(SSL_TSI_TEST_ALPN1);
   alpn_lib->server_alpn_protocols[1] = gpr_strdup(SSL_TSI_TEST_ALPN3);
   alpn_lib->client_alpn_protocols[0] = gpr_strdup(SSL_TSI_TEST_ALPN2);
@@ -431,7 +436,8 @@ void ssl_tsi_test_do_handshake_with_server_name_indication_exact_domain() {
   /* server1 cert contains "waterzooi.test.google.be" in SAN. */
   tsi_test_fixture *fixture = ssl_tsi_test_fixture_create();
   ssl_tsi_test_fixture *ssl_fixture = (ssl_tsi_test_fixture *)fixture;
-  ssl_fixture->server_name_indication = "waterzooi.test.google.be";
+  ssl_fixture->server_name_indication =
+      const_cast<char *>("waterzooi.test.google.be");
   tsi_test_do_handshake(fixture);
   tsi_test_fixture_destroy(fixture);
 }
@@ -440,7 +446,8 @@ void ssl_tsi_test_do_handshake_with_server_name_indication_wild_star_domain() {
   /* server1 cert contains "*.test.google.fr" in SAN. */
   tsi_test_fixture *fixture = ssl_tsi_test_fixture_create();
   ssl_tsi_test_fixture *ssl_fixture = (ssl_tsi_test_fixture *)fixture;
-  ssl_fixture->server_name_indication = "juju.test.google.fr";
+  ssl_fixture->server_name_indication =
+      const_cast<char *>("juju.test.google.fr");
   tsi_test_do_handshake(fixture);
   tsi_test_fixture_destroy(fixture);
 }
@@ -495,8 +502,8 @@ void ssl_tsi_test_do_handshake_alpn_client_server_ok() {
 }
 
 void ssl_tsi_test_do_round_trip_for_all_configs() {
-  unsigned int *bit_array =
-      gpr_zalloc(sizeof(unsigned int) * TSI_TEST_NUM_OF_ARGUMENTS);
+  unsigned int *bit_array = static_cast<unsigned int *>(
+      gpr_zalloc(sizeof(unsigned int) * TSI_TEST_NUM_OF_ARGUMENTS));
   const unsigned int mask = 1U << (TSI_TEST_NUM_OF_ARGUMENTS - 1);
   for (unsigned int val = 0; val < TSI_TEST_NUM_OF_COMBINATIONS; val++) {
     unsigned int v = val;
diff --git a/test/core/tsi/transport_security_test.c b/test/core/tsi/transport_security_test.cc
index 27932a8169..c1be1e952d 100644
--- a/test/core/tsi/transport_security_test.c
+++ b/test/core/tsi/transport_security_test.cc
@@ -200,7 +200,7 @@ typedef struct {
 } parsed_names;
 
 name_list *name_list_add(const char *n) {
-  name_list *result = gpr_malloc(sizeof(name_list));
+  name_list *result = static_cast<name_list *>(gpr_malloc(sizeof(name_list)));
   result->name = n;
   result->next = NULL;
   return result;
diff --git a/test/core/tsi/transport_security_test_lib.c b/test/core/tsi/transport_security_test_lib.cc
index 329b2371bf..454b79c0cc 100644
--- a/test/core/tsi/transport_security_test_lib.c
+++ b/test/core/tsi/transport_security_test_lib.cc
@@ -57,10 +57,12 @@ static handshaker_args *handshaker_args_create(tsi_test_fixture *fixture,
                                                bool is_client) {
   GPR_ASSERT(fixture != NULL);
   GPR_ASSERT(fixture->config != NULL);
-  handshaker_args *args = gpr_zalloc(sizeof(*args));
+  handshaker_args *args =
+      static_cast<handshaker_args *>(gpr_zalloc(sizeof(*args)));
   args->fixture = fixture;
   args->handshake_buffer_size = fixture->handshake_buffer_size;
-  args->handshake_buffer = gpr_zalloc(args->handshake_buffer_size);
+  args->handshake_buffer =
+      static_cast<unsigned char *>(gpr_zalloc(args->handshake_buffer_size));
   args->is_client = is_client;
   args->error = GRPC_ERROR_NONE;
   return args;
@@ -181,7 +183,8 @@ static void send_message_to_peer(tsi_test_fixture *fixture,
   GPR_ASSERT(fixture->config != NULL);
   GPR_ASSERT(protector != NULL);
   tsi_test_frame_protector_config *config = fixture->config;
-  unsigned char *protected_buffer = gpr_zalloc(config->protected_buffer_size);
+  unsigned char *protected_buffer =
+      static_cast<unsigned char *>(gpr_zalloc(config->protected_buffer_size));
   size_t message_size =
       is_client ? config->client_message_size : config->server_message_size;
   uint8_t *message =
@@ -238,9 +241,10 @@ static void receive_message_from_peer(tsi_test_fixture *fixture,
   size_t read_from_peer_size = 0;
   tsi_result result = TSI_OK;
   bool done = false;
-  unsigned char *read_buffer = gpr_zalloc(config->read_buffer_allocated_size);
-  unsigned char *message_buffer =
-      gpr_zalloc(config->message_buffer_allocated_size);
+  unsigned char *read_buffer = static_cast<unsigned char *>(
+      gpr_zalloc(config->read_buffer_allocated_size));
+  unsigned char *message_buffer = static_cast<unsigned char *>(
+      gpr_zalloc(config->message_buffer_allocated_size));
   /* Do unprotect on data received from peer. */
   while (!done && result == TSI_OK) {
     /* Receive data from peer. */
@@ -429,7 +433,7 @@ void tsi_test_do_round_trip(tsi_test_fixture *fixture) {
   /* Client sends a message to server. */
   send_message_to_peer(fixture, client_frame_protector, true /* is_client */);
   unsigned char *server_received_message =
-      gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE);
+      static_cast<unsigned char *>(gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE));
   size_t server_received_message_size = 0;
   receive_message_from_peer(
       fixture, server_frame_protector, server_received_message,
@@ -440,7 +444,7 @@ void tsi_test_do_round_trip(tsi_test_fixture *fixture) {
   /* Server sends a message to client. */
   send_message_to_peer(fixture, server_frame_protector, false /* is_client */);
   unsigned char *client_received_message =
-      gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE);
+      static_cast<unsigned char *>(gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE));
   size_t client_received_message_size = 0;
   receive_message_from_peer(
       fixture, client_frame_protector, client_received_message,
@@ -458,7 +462,8 @@ void tsi_test_do_round_trip(tsi_test_fixture *fixture) {
 static unsigned char *generate_random_message(size_t size) {
   size_t i;
   unsigned char chars[] = "abcdefghijklmnopqrstuvwxyz1234567890";
-  unsigned char *output = gpr_zalloc(sizeof(unsigned char) * size);
+  unsigned char *output =
+      static_cast<unsigned char *>(gpr_zalloc(sizeof(unsigned char) * size));
   for (i = 0; i < size - 1; ++i) {
     output[i] = chars[rand() % (int)(sizeof(chars) - 1)];
   }
@@ -473,7 +478,9 @@ tsi_test_frame_protector_config *tsi_test_frame_protector_config_create(
     bool use_default_client_max_output_protected_frame_size,
     bool use_default_server_max_output_protected_frame_size,
     bool use_default_handshake_buffer_size) {
-  tsi_test_frame_protector_config *config = gpr_zalloc(sizeof(*config));
+  tsi_test_frame_protector_config *config =
+      static_cast<tsi_test_frame_protector_config *>(
+          gpr_zalloc(sizeof(*config)));
   /* Set the value for read_buffer_allocated_size. */
   config->read_buffer_allocated_size =
       use_default_read_buffer_allocated_size
@@ -548,8 +555,10 @@ void tsi_test_fixture_init(tsi_test_fixture *fixture) {
   fixture->config = tsi_test_frame_protector_config_create(
       true, true, true, true, true, true, true, true);
   fixture->handshake_buffer_size = TSI_TEST_DEFAULT_BUFFER_SIZE;
-  fixture->client_channel = gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE);
-  fixture->server_channel = gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE);
+  fixture->client_channel =
+      static_cast<uint8_t *>(gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE));
+  fixture->server_channel =
+      static_cast<uint8_t *>(gpr_zalloc(TSI_TEST_DEFAULT_CHANNEL_SIZE));
   fixture->bytes_written_to_client_channel = 0;
   fixture->bytes_written_to_server_channel = 0;
   fixture->bytes_read_from_client_channel = 0;
diff --git a/test/core/util/grpc_profiler.c b/test/core/util/grpc_profiler.cc
index 47b0270e29..47b0270e29 100644
--- a/test/core/util/grpc_profiler.c
+++ b/test/core/util/grpc_profiler.cc
diff --git a/test/core/util/memory_counters.c b/test/core/util/memory_counters.cc
index 9fb3ffe095..9fb3ffe095 100644
--- a/test/core/util/memory_counters.c
+++ b/test/core/util/memory_counters.cc
diff --git a/test/core/util/mock_endpoint.c b/test/core/util/mock_endpoint.cc
index bd386b2148..bd386b2148 100644
--- a/test/core/util/mock_endpoint.c
+++ b/test/core/util/mock_endpoint.cc
diff --git a/test/core/util/one_corpus_entry_fuzzer.c b/test/core/util/one_corpus_entry_fuzzer.cc
index 42467390f2..42467390f2 100644
--- a/test/core/util/one_corpus_entry_fuzzer.c
+++ b/test/core/util/one_corpus_entry_fuzzer.cc
diff --git a/test/core/util/parse_hexstring.c b/test/core/util/parse_hexstring.cc
index 346b871b67..346b871b67 100644
--- a/test/core/util/parse_hexstring.c
+++ b/test/core/util/parse_hexstring.cc
diff --git a/test/core/util/passthru_endpoint.c b/test/core/util/passthru_endpoint.cc
index 38a47584d5..38a47584d5 100644
--- a/test/core/util/passthru_endpoint.c
+++ b/test/core/util/passthru_endpoint.cc
diff --git a/test/core/util/port.c b/test/core/util/port.cc
index 61f2e5018f..61f2e5018f 100644
--- a/test/core/util/port.c
+++ b/test/core/util/port.cc
diff --git a/test/core/util/port_server_client.c b/test/core/util/port_server_client.cc
index 7b94ac4ada..2c7301d058 100644
--- a/test/core/util/port_server_client.c
+++ b/test/core/util/port_server_client.cc
@@ -80,7 +80,7 @@ void grpc_free_port_using_server(int port) {
   shutdown_closure = GRPC_CLOSURE_CREATE(destroy_pops_and_shutdown, &pr.pops,
                                          grpc_schedule_on_exec_ctx);
 
-  req.host = GRPC_PORT_SERVER_ADDRESS;
+  req.host = const_cast<char *>(GRPC_PORT_SERVER_ADDRESS);
   gpr_asprintf(&path, "/drop/%d", port);
   req.http.path = path;
 
@@ -167,7 +167,7 @@ static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
             GPR_TIMESPAN)));
     pr->retries++;
     req.host = pr->server;
-    req.http.path = "/get";
+    req.http.path = const_cast<char *>("/get");
     grpc_http_response_destroy(&pr->response);
     memset(&pr->response, 0, sizeof(pr->response));
     grpc_resource_quota *resource_quota =
@@ -213,11 +213,11 @@ int grpc_pick_port_using_server(void) {
   shutdown_closure = GRPC_CLOSURE_CREATE(destroy_pops_and_shutdown, &pr.pops,
                                          grpc_schedule_on_exec_ctx);
   pr.port = -1;
-  pr.server = GRPC_PORT_SERVER_ADDRESS;
+  pr.server = const_cast<char *>(GRPC_PORT_SERVER_ADDRESS);
   pr.ctx = &context;
 
-  req.host = GRPC_PORT_SERVER_ADDRESS;
-  req.http.path = "/get";
+  req.host = const_cast<char *>(GRPC_PORT_SERVER_ADDRESS);
+  req.http.path = const_cast<char *>("/get");
 
   grpc_httpcli_context_init(&context);
   grpc_resource_quota *resource_quota =
diff --git a/test/core/util/reconnect_server.c b/test/core/util/reconnect_server.cc
index 9c56e02e8e..883c02e51c 100644
--- a/test/core/util/reconnect_server.c
+++ b/test/core/util/reconnect_server.cc
@@ -82,7 +82,7 @@ static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
       gpr_free(peer);
     }
   }
-  new_tail = gpr_malloc(sizeof(timestamp_list));
+  new_tail = static_cast<timestamp_list *>(gpr_malloc(sizeof(timestamp_list)));
   new_tail->timestamp = now;
   new_tail->next = NULL;
   if (server->tail == NULL) {
diff --git a/test/core/util/slice_splitter.c b/test/core/util/slice_splitter.cc
index 6fcef9acce..6fcef9acce 100644
--- a/test/core/util/slice_splitter.c
+++ b/test/core/util/slice_splitter.cc
diff --git a/test/core/util/test_config.c b/test/core/util/test_config.cc
index 536045e1c3..536045e1c3 100644
--- a/test/core/util/test_config.c
+++ b/test/core/util/test_config.cc
diff --git a/test/core/util/test_tcp_server.c b/test/core/util/test_tcp_server.cc
index 611ecb330c..e2d1562aca 100644
--- a/test/core/util/test_tcp_server.c
+++ b/test/core/util/test_tcp_server.cc
@@ -35,7 +35,7 @@
 
 static void on_server_destroyed(grpc_exec_ctx *exec_ctx, void *data,
                                 grpc_error *error) {
-  test_tcp_server *server = data;
+  test_tcp_server *server = static_cast<test_tcp_server *>(data);
   server->shutdown = 1;
 }
 
@@ -46,7 +46,8 @@ void test_tcp_server_init(test_tcp_server *server,
   GRPC_CLOSURE_INIT(&server->shutdown_complete, on_server_destroyed, server,
                     grpc_schedule_on_exec_ctx);
   server->shutdown = 0;
-  server->pollset = gpr_zalloc(grpc_pollset_size());
+  server->pollset =
+      static_cast<grpc_pollset *>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(server->pollset, &server->mu);
   server->on_connect = on_connect;
   server->cb_data = user_data;
@@ -93,7 +94,7 @@ void test_tcp_server_poll(test_tcp_server *server, int seconds) {
 static void do_nothing(grpc_exec_ctx *exec_ctx, void *arg, grpc_error *error) {}
 static void finish_pollset(grpc_exec_ctx *exec_ctx, void *arg,
                            grpc_error *error) {
-  grpc_pollset_destroy(exec_ctx, arg);
+  grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset *>(arg));
 }
 
 void test_tcp_server_destroy(test_tcp_server *server) {
diff --git a/test/core/util/trickle_endpoint.c b/test/core/util/trickle_endpoint.cc
index fc066f9d80..fc066f9d80 100644
--- a/test/core/util/trickle_endpoint.c
+++ b/test/core/util/trickle_endpoint.cc