diff --git a/tools/gce_setup/interop_test_runner.sh b/tools/gce_setup/interop_test_runner.sh
index cfdb7048fceb1bb1da250727f7d8578b62d8ad33..1c0d82095c41f650cb49b97a78fed3f0d8a4944f 100755
--- a/tools/gce_setup/interop_test_runner.sh
+++ b/tools/gce_setup/interop_test_runner.sh
@@ -2,7 +2,7 @@
 
 main() {
   source grpc_docker.sh
-  test_cases=(large_unary empty unary ping_pong client_streaming server_streaming)
+  test_cases=(large_unary empty_unary ping_pong client_streaming server_streaming)
   clients=(cxx java go ruby)
   servers=(cxx java go ruby)
   for test_case in "${test_cases[@]}"