update the test_mean test case for bug fix

update the test_mean test case

python/paddle/fluid/tests/unittests/test_mean_op.py

@@ -101,7 +101,7 @@ class TestMeanAPI(unittest.TestCase):
                           fetch_list=[out1, out2, out3, out4, out5])
         out_ref = np.mean(self.x)
         for out in res:
-            self.assertEqual(np.allclose(out, out_ref), True)
+            self.assertEqual(np.allclose(out, out_ref, rtol=1e-04), True)
 
     def test_api_dygraph(self):
         paddle.disable_static(self.place)
@@ -114,7 +114,9 @@ class TestMeanAPI(unittest.TestCase):
                 if len(axis) == 0:
                     axis = None
             out_ref = np.mean(x, axis, keepdims=keepdim)
-            self.assertEqual(np.allclose(out.numpy(), out_ref), True)
+            self.assertEqual(
+                np.allclose(
+                    out.numpy(), out_ref, rtol=1e-04), True)
 
         test_case(self.x)
         test_case(self.x, [])