diff --git a/python/paddle/fluid/tests/unittests/test_conv2d_transpose_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_conv2d_transpose_mkldnn_op.py
index b33a2b0bf68ed1931ec69902c6d740dae786e4c1..01a7cd6ca17d7900f82385903caabaffec20e26f 100644
--- a/python/paddle/fluid/tests/unittests/test_conv2d_transpose_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv2d_transpose_mkldnn_op.py
@@ -52,6 +52,7 @@ class TestMKLDNNWithPad(TestWithPad):
     def test_check_grad_no_filter(self):
         return
 
+
 class TestMKLDNNWithStride(TestWithStride):
     def init_op_type(self):
         self.is_test = True