diff --git a/python/paddle/fluid/tests/unittests/test_reader_reset.py b/python/paddle/fluid/tests/unittests/test_reader_reset.py
index a115c37e1df3fab98f105fa55f2f049dbcd98929..e97a05b6f929821f82d96b462598a5ff03cf0a48 100644
--- a/python/paddle/fluid/tests/unittests/test_reader_reset.py
+++ b/python/paddle/fluid/tests/unittests/test_reader_reset.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 from __future__ import print_function
-
+import os
 import paddle.fluid as fluid
 import paddle
 import numpy as np