ACTUALLY set the server thread pool
diff --git a/test/cpp/qps/server_sync.cc b/test/cpp/qps/server_sync.cc
index 88a201f..8a75b73 100644
--- a/test/cpp/qps/server_sync.cc
+++ b/test/cpp/qps/server_sync.cc
@@ -88,6 +88,8 @@
 
     builder.RegisterService(&service_);
 
+    builder.SetThreadPool(&thread_pool_);
+
     return builder.BuildAndStart();
   }