diff --git a/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_server.py b/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_server.py
index 361d5a59becb7c110907f66d8b651e05e7eb418e..8a3bee4e628ddd0896c1d2facbccbf2ef493df2b 100755
--- a/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_server.py
+++ b/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_server.py
@@ -33,5 +33,9 @@ server = Server()
 server.set_op_sequence(op_seq_maker.get_op_sequence())
 server.set_num_threads(4)
 server.load_model_config(sys.argv[1], sys.argv[2])
-server.prepare_server(workdir="work_dir1", port=9292, device="cpu")
+server.prepare_server(
+    workdir="work_dir1",
+    port=9292,
+    device="cpu",
+    cube_conf="./cube/conf/cube.conf")
 server.run_server()