diff --git a/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_client.py b/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_client.py
index 3e701cfe3ae2897d9046f83f700aa6fcd6b25412..ffece54cbdc5c7120fb6ac53e14d110d8247da97 100755
--- a/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_client.py
+++ b/python/examples/grpc_impl_example/criteo_ctr_with_cube/test_client.py
@@ -22,7 +22,6 @@ from paddle_serving_client.metric import auc
 
 client = Client()
 client.connect(["127.0.0.1:9292"])
-client.set_rpc_timeout_ms(10000)
 
 batch = 1
 buf_size = 100
diff --git a/tools/serving_build.sh b/tools/serving_build.sh
index 3d49004f8914e272fea3e86c8e7d53fe748840b4..d75d646bd485fbe0abf3544cc40b60abe71161a9 100644
--- a/tools/serving_build.sh
+++ b/tools/serving_build.sh
@@ -548,6 +548,8 @@ function python_test_grpc_impl() {
             check_cmd "mkdir work_dir1 && cp cube/conf/cube.conf ./work_dir1/"
             python test_server.py ctr_serving_model_kv ctr_client_conf/serving_client_conf.prototxt &
             sleep 5
+            # warm up
+            python test_client.py ./ut_data &> /dev/null
             check_cmd "python test_client.py ./ut_data >score"
             tail -n 2 score | awk 'NR==1'
             AUC=$(tail -n 2  score | awk 'NR==1')