diff --git a/python/paddle/v2/fluid/tests/test_split_op.py b/python/paddle/v2/fluid/tests/test_split_op.py
index b0fe111f3b55caff744cfbd34eb56a17f815f9f2..50347d2df48e3f163054d627fd4624c330690c67 100644
--- a/python/paddle/v2/fluid/tests/test_split_op.py
+++ b/python/paddle/v2/fluid/tests/test_split_op.py
@@ -31,8 +31,8 @@ class TestSplitOp(OpTest):
     def test_check_output(self):
         self.check_output()
 
-    #def test_check_grad(self):
-    #    self.check_grad(['X'], ['out0', 'out1', 'out2'])
+    def test_check_grad(self):
+        self.check_grad(['X'], ['out0', 'out1', 'out2'])
 
 
 if __name__ == '__main__':