diff --git a/paddle/fluid/operators/sum_mkldnn_op.cc b/paddle/fluid/operators/sum_mkldnn_op.cc
index 0e201420cecf803e10ad551c40e3fa494975d834..f78d977760f18c9eb1270e515e68acb208a7c9a4 100644
--- a/paddle/fluid/operators/sum_mkldnn_op.cc
+++ b/paddle/fluid/operators/sum_mkldnn_op.cc
@@ -53,7 +53,6 @@ class SumMKLDNNOpKernel : public paddle::framework::OpKernel<T> {
                    "It must use CPUPlace.");
     auto& dev_ctx = ctx.template device_context<MKLDNNDeviceContext>();
     const auto& mkldnn_engine = dev_ctx.GetEngine();
-
     auto in_vars = ctx.MultiInputVar("X");
 
     const int N = in_vars.size();
diff --git a/python/paddle/fluid/tests/unittests/test_sum_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_sum_mkldnn_op.py
new file mode 100644
index 0000000000000000000000000000000000000000..7956897d68a3fb49d62ba696d0b6400b4f909989
--- /dev/null
+++ b/python/paddle/fluid/tests/unittests/test_sum_mkldnn_op.py
@@ -0,0 +1,26 @@
+# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+from test_sum_op import TestSumOp
+
+
+class TestMKLDNN(TestSumOp):
+    def init_kernel_type(self):
+        self.use_mkldnn = True
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/python/paddle/fluid/tests/unittests/test_sum_op.py b/python/paddle/fluid/tests/unittests/test_sum_op.py
index 2faf5b10647a1fa1d44e4847f017db177ee8808a..1d90414e137a70e6265042e24e106fe565802778 100644
--- a/python/paddle/fluid/tests/unittests/test_sum_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sum_op.py
@@ -20,12 +20,15 @@ from op_test import OpTest
 class TestSumOp(OpTest):
     def setUp(self):
         self.op_type = "sum"
+        self.use_mkldnn = False
+        self.init_kernel_type()
         x0 = np.random.random((3, 4)).astype('float32')
         x1 = np.random.random((3, 4)).astype('float32')
         x2 = np.random.random((3, 4)).astype('float32')
         self.inputs = {"X": [("x0", x0), ("x1", x1), ("x2", x2)]}
         y = x0 + x1 + x2
         self.outputs = {'Out': y}
+        self.attrs = {'use_mkldnn': self.use_mkldnn}
 
     def test_check_output(self):
         self.check_output()
@@ -33,6 +36,9 @@ class TestSumOp(OpTest):
     def test_check_grad(self):
         self.check_grad(['x0'], 'Out')
 
+    def init_kernel_type(self):
+        pass
+
 
 if __name__ == "__main__":
     unittest.main()