diff --git a/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py b/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py
index e9116ae1b44346cc3ea13daa58513cf24a14120a..01710d579a6fbb0d7b15588767b8865bf95b4609 100644
--- a/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py
+++ b/python/paddle/fluid/tests/unittests/test_cross_entropy_loss.py
@@ -1375,7 +1375,10 @@ class TestCrossEntropyFAPIError(unittest.TestCase):
                 label_data[0] = 255
                 weight_data = paddle.rand([100])
                 paddle.nn.functional.cross_entropy(
-                    input=input_data, label=label_data, weight=weight_data)
+                    input=input_data,
+                    label=label_data,
+                    weight=weight_data,
+                    ignore_index=0)
 
             self.assertRaises(ValueError, test_LabelValue)
 
@@ -1386,7 +1389,10 @@ class TestCrossEntropyFAPIError(unittest.TestCase):
                 label_data[0] = -1
                 weight_data = paddle.rand([100])
                 paddle.nn.functional.cross_entropy(
-                    input=input_data, label=label_data, weight=weight_data)
+                    input=input_data,
+                    label=label_data,
+                    weight=weight_data,
+                    ignore_index=0)
 
             self.assertRaises(ValueError, test_LabelValueNeg)