Fix tests skip (#32012)

* [run-slow] clip

* [run-slow] clip

* Fix skip -> skipTest

* [run-slow] clip

tests/models/big_bird/test_modeling_big_bird.py

@@ -716,7 +716,7 @@ class BigBirdModelIntegrationTest(unittest.TestCase):
         """
 
         if not self.test_attention_probs:
-            self.skip("test_attention_probs is set to False")
+            self.skipTest("test_attention_probs is set to False")
 
         model = BigBirdModel.from_pretrained(
             "google/bigbird-roberta-base", attention_type="block_sparse", num_random_blocks=3, block_size=16

tests/models/whisper/test_modeling_whisper.py

@@ -3335,7 +3335,7 @@ class WhisperEncoderModelTest(ModelTesterMixin, GenerationTesterMixin, unittest.
                 fx_model_class_name = "Flax" + model_class.__name__
 
                 if not hasattr(transformers, fx_model_class_name):
-                    self.skip("Flax model does not exist")
+                    self.skipTest("Flax model does not exist")
 
                 # Output all for aggressive testing
                 config.output_hidden_states = True

tests/test_tokenization_common.py

@@ -2678,7 +2678,7 @@ class TokenizerTesterMixin:
                 config = config_class()
 
                 if config.is_encoder_decoder or config.pad_token_id is None:
-                    self.skip("Model is not an encoder-decoder model or has no set pad token id")
+                    self.skipTest("Model is not an encoder-decoder model or has no set pad token id")
 
                 # Build sequence
                 first_ten_tokens = list(tokenizer.get_vocab().keys())[:10]