diff --git a/tools/serving_build.sh b/tools/serving_build.sh
index 24d62c7651aa242268fabbbcebcb7851bdc3130c..a02308cd7ad57f55306aa1f36acebe84e656dea7 100644
--- a/tools/serving_build.sh
+++ b/tools/serving_build.sh
@@ -383,7 +383,7 @@ function python_test_multi_process(){
             echo "bert mutli rpc RPC inference pass"
             ;;
         GPU)
-            rm -rf ./image # ? just for test
+            rm -rf ./image # ?just for test
             check_cmd "python -m paddle_serving_server_gpu.serve --model uci_housing_model --port 9292 --workdir test9292 --gpu_ids 0 &"
             check_cmd "python -m paddle_serving_server_gpu.serve --model uci_housing_model --port 9293 --workdir test9293 --gpu_ids 0 &"
             sleep 5