diff --git a/python/paddle/fluid/tests/unittests/test_dataset.py b/python/paddle/fluid/tests/unittests/test_dataset.py
index cdbbf23c1115c552725e449f6c62baccbc7ee76f..a6cd32bd6158eef01b2e7d0780d260b1049f38ab 100644
--- a/python/paddle/fluid/tests/unittests/test_dataset.py
+++ b/python/paddle/fluid/tests/unittests/test_dataset.py
@@ -1,7 +1,3 @@
-"""
-dataset testcases
-
-"""
 #   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");