diff --git a/tools/internal_ci/macos/grpc_cfstream_tsan.cfg b/tools/internal_ci/macos/grpc_cfstream_tsan.cfg
index a72a8456e16..e86dc1b7fe7 100644
--- a/tools/internal_ci/macos/grpc_cfstream_tsan.cfg
+++ b/tools/internal_ci/macos/grpc_cfstream_tsan.cfg
@@ -18,6 +18,6 @@
 build_file: "grpc/tools/internal_ci/macos/grpc_run_bazel_isolated_tests.sh"
 env_vars {
   key: "RUN_TESTS_FLAGS"
-  value: "--config=tsan"
+  value: "--config=tsan_macos"
 }