3 files changed, 3 insertions, 3 deletions
diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index 8a00b61cef..5688ab7971 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -51,7 +51,7 @@ DEFINE_bool(use_tls, false, "Whether to use tls.");
 DEFINE_string(custom_credentials_type, "", "User provided credentials type.");
 DEFINE_bool(use_test_ca, false, "False to use SSL roots for google");
 DEFINE_int32(server_port, 0, "Server port.");
-DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
+DEFINE_string(server_host, "localhost", "Server host to connect to");
 DEFINE_string(server_host_override, "foo.test.google.fr",
               "Override the server host which is sent in HTTP header");
 DEFINE_string(
diff --git a/test/cpp/interop/http2_client.cc b/test/cpp/interop/http2_client.cc
index 38aee43b26..b96e9fac36 100644
--- a/test/cpp/interop/http2_client.cc
+++ b/test/cpp/interop/http2_client.cc
@@ -223,7 +223,7 @@ bool Http2Client::DoMaxStreams() {
 }  // namespace grpc
 
 DEFINE_int32(server_port, 0, "Server port.");
-DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
+DEFINE_string(server_host, "localhost", "Server host to connect to");
 DEFINE_string(test_case, "rst_after_header",
               "Configure different test cases. Valid options are:\n\n"
               "goaway\n"
diff --git a/test/cpp/interop/reconnect_interop_client.cc b/test/cpp/interop/reconnect_interop_client.cc
index 797e52c744..1c2f606637 100644
--- a/test/cpp/interop/reconnect_interop_client.cc
+++ b/test/cpp/interop/reconnect_interop_client.cc
@@ -48,7 +48,7 @@
 
 DEFINE_int32(server_control_port, 0, "Server port for control rpcs.");
 DEFINE_int32(server_retry_port, 0, "Server port for testing reconnection.");
-DEFINE_string(server_host, "127.0.0.1", "Server host to connect to");
+DEFINE_string(server_host, "localhost", "Server host to connect to");
 DEFINE_int32(max_reconnect_backoff_ms, 0,
              "Maximum backoff time, or 0 for default.");