diff --git a/tests/common_test.py b/tests/common_test.py
index 7ca8c9fb77ccc..9f811a64f3786 100644
--- a/tests/common_test.py
+++ b/tests/common_test.py
@@ -118,6 +118,10 @@ def _check_output_impl(self,
                     msg=error_msg.format(paddle.get_device(),
                                          expected_result.shape, result.shape,
                                          self.__class__.__name__))
+        else:
+            raise ValueError(
+                'result type must be str, int, bool, set, np.bool, np.int32, '
+                'np.int64, np.str, float, np.ndarray, np.float32, np.float64')
 
     def check_output_equal(self,
                            result,
diff --git a/tests/data/test_sampler.py b/tests/data/test_sampler.py
index 7ba0d4a29b6ea..2e5d1f30fe6fd 100644
--- a/tests/data/test_sampler.py
+++ b/tests/data/test_sampler.py
@@ -56,7 +56,8 @@ def test_iter2(self):
     def test_list(self):
         train_batch_sampler = SamplerHelper(self.train_ds)
         list_sampler = train_batch_sampler.list()
-        self.check_output_equal(type(iter(list_sampler)), "listiterator")
+        self.check_output_equal(
+            type(iter(list_sampler)).__name__, "list_iterator")
         for i, sample in enumerate(list_sampler):
             self.check_output_equal(i, sample)
 
diff --git a/tests/transformers/bigbird/test_modeling.py b/tests/transformers/bigbird/test_modeling.py
index 35260408c496f..72c22a8ba0844 100644
--- a/tests/transformers/bigbird/test_modeling.py
+++ b/tests/transformers/bigbird/test_modeling.py
@@ -91,7 +91,6 @@ def setUp(self):
             'bigbird-base-uncased']
         self.config['num_layers'] = 2
         self.config['vocab_size'] = 1024
-        self.config['vocab_size'] = 1024
         self.config['attn_dropout'] = 0.0
         self.config['hidden_dropout_prob'] = 0.0
         self.config['dim_feedforward'] = 1024
@@ -115,7 +114,7 @@ def test_forward(self):
         expected_output = np.array(
             [[0.38314182, -0.13412490], [0.32075390, 0.07187212]])
 
-        self.check_output_equal(output, expected_output)
+        self.check_output_equal(output.numpy(), expected_output)
 
 
 class TestBigBirdForPretraining(CommonTest):
@@ -124,7 +123,6 @@ def setUp(self):
             'bigbird-base-uncased']
         self.config['num_layers'] = 2
         self.config['vocab_size'] = 1024
-        self.config['vocab_size'] = 1024
         self.config['attn_dropout'] = 0.0
         self.config['hidden_dropout_prob'] = 0.0
         self.config['dim_feedforward'] = 1024
diff --git a/tests/transformers/bigbird/test_tokenizer.py b/tests/transformers/bigbird/test_tokenizer.py
index 122dc9ba7966d..65215ccdb0c28 100644
--- a/tests/transformers/bigbird/test_tokenizer.py
+++ b/tests/transformers/bigbird/test_tokenizer.py
@@ -126,7 +126,7 @@ def setUp(self):
 
     def test_empty_text(self):
         ids = self.tokenizer('')
-        self.check_output_equal(ids, [])
+        self.check_output_equal(ids == [], True)
 
     def test_bytes(self):
         byte_text = 'An extremely powerful film that certainly isnt '\