diff --git a/tools/gce_setup/cloud_prod_runner.sh b/tools/gce_setup/cloud_prod_runner.sh
index 0389ac9dc11..812be4061cd 100755
--- a/tools/gce_setup/cloud_prod_runner.sh
+++ b/tools/gce_setup/cloud_prod_runner.sh
@@ -38,7 +38,7 @@ main() {
   source grpc_docker.sh
   test_cases=(large_unary empty_unary ping_pong client_streaming server_streaming cancel_after_begin cancel_after_first_response)
   auth_test_cases=(service_account_creds compute_engine_creds jwt_token_creds)
-  clients=(cxx java go ruby node csharp_mono python)
+  clients=(cxx java go ruby node csharp_mono python php)
   for test_case in "${test_cases[@]}"
   do
     for client in "${clients[@]}"