diff --git a/python/paddle/fluid/tests/unittests/op_test.py b/python/paddle/fluid/tests/unittests/op_test.py
index d2be39ebc7da14aa49840c60a73f0dd65874764e..9503a919a944c2eb6191bb2e05bb856a0d9813c9 100644
--- a/python/paddle/fluid/tests/unittests/op_test.py
+++ b/python/paddle/fluid/tests/unittests/op_test.py
@@ -209,8 +209,8 @@ class OpTest(unittest.TestCase):
 
         if not hasattr(cls, "op_type"):
             raise AssertionError(
-                "This test do not have op_type in class attrs,"
-                " please set self.__class__.op_type=the_real_op_type manually.")
+                "This test do not have op_type in class attrs, "
+                "please set self.__class__.op_type=the_real_op_type manually.")
 
         # case in NO_FP64_CHECK_GRAD_CASES and op in NO_FP64_CHECK_GRAD_OP_LIST should be fixed
         if not hasattr(cls, "no_need_check_grad") \
@@ -222,9 +222,11 @@ class OpTest(unittest.TestCase):
                 raise AssertionError("This test of %s op needs check_grad." %
                                      cls.op_type)
 
+            # check for op test with fp64 precision, but not check mkldnn op test for now
             if cls.dtype in [np.float32, np.float64] \
                 and cls.op_type not in op_accuracy_white_list.NO_FP64_CHECK_GRAD_OP_LIST \
-                and not hasattr(cls, 'exist_fp64_check_grad'):
+                and not hasattr(cls, 'exist_fp64_check_grad') \
+                and (not hasattr(cls, "use_mkldnn") or cls.use_mkldnn == False):
                 raise AssertionError(
                     "This test of %s op needs check_grad with fp64 precision." %
                     cls.op_type)