diff --git a/tools/gce_setup/interop_test_runner.sh b/tools/gce_setup/interop_test_runner.sh
index cfdb7048fce..1c0d82095c4 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[@]}"