diff --git a/python/paddle_serving_server/env_check/run.py b/python/paddle_serving_server/env_check/run.py
index 9b1ed150a064d2546e5b196bddfb43fcda65708a..f7ad73652024f808743a2599d4eb848ef06e1a75 100644
--- a/python/paddle_serving_server/env_check/run.py
+++ b/python/paddle_serving_server/env_check/run.py
@@ -53,7 +53,7 @@ def run_test_cases(cases_list, case_type, is_open_std):
                 print("{} {} environment running failure, if you need this environment, please refer to https://github.com/PaddlePaddle/Serving/blob/develop/doc/Install_CN.md".format(case_type, case_name))
 
 def unset_env(key):
-    os.unsetenv(key)
+    del os.environ[key]
 
 def check_env(mode):
     
diff --git a/python/paddle_serving_server/env_check/test_uci_pipeline.py b/python/paddle_serving_server/env_check/test_uci_pipeline.py
index faa1640ea2fa76ad4d24635eacf28a83c10542ea..8b115c521eab8bd60fd4f8c448149b074ac5fb92 100644
--- a/python/paddle_serving_server/env_check/test_uci_pipeline.py
+++ b/python/paddle_serving_server/env_check/test_uci_pipeline.py
@@ -25,7 +25,7 @@ class TestUCIPipeline(object):
 
     def teardown_method(self):
         print_log(["stderr.log", "stdout.log",
-                   "PipelineServingLogs/pipeline.log"], iden="after predict")
+                   "PipelineServingLogs/pipeline.log"])
         kill_process(9998)
         kill_process(18082)
         self.serving_util.release('web_service')