diff --git a/test/cpp/interop/client.cc b/test/cpp/interop/client.cc
index a4b1a85f856..08aad0b0118 100644
--- a/test/cpp/interop/client.cc
+++ b/test/cpp/interop/client.cc
@@ -38,7 +38,7 @@ 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, "localhost", "Server host to connect to");
-DEFINE_string(server_host_override, "foo.test.google.fr",
+DEFINE_string(server_host_override, "",
               "Override the server host which is sent in HTTP header");
 DEFINE_string(
     test_case, "large_unary",
diff --git a/test/cpp/interop/stress_test.cc b/test/cpp/interop/stress_test.cc
index ebbd14beba2..3e00980a269 100644
--- a/test/cpp/interop/stress_test.cc
+++ b/test/cpp/interop/stress_test.cc
@@ -103,7 +103,7 @@ DEFINE_bool(use_alts, false,
             "Whether to use alts. Enable alts will disable tls.");
 DEFINE_bool(use_tls, false, "Whether to use tls.");
 DEFINE_bool(use_test_ca, false, "False to use SSL roots for google");
-DEFINE_string(server_host_override, "foo.test.google.fr",
+DEFINE_string(server_host_override, "",
               "Override the server host which is sent in HTTP header");
 
 using grpc::testing::ALTS;