Skip tests properly (#31308)

* Skip tests properly

* [test_all]

* Add 'reason' as kwarg for skipTest

* [test_all] Fix up

* [test_all]

tests/models/bart/test_modeling_bart.py

@@ -1515,9 +1515,10 @@ class BartStandaloneDecoderModelTest(ModelTesterMixin, GenerationTesterMixin, un
         config_and_inputs = self.model_tester.prepare_config_and_inputs()
         self.model_tester.create_and_check_decoder_model_attention_mask_past(*config_and_inputs)
 
+    @unittest.skip(reason="Decoder cannot keep gradients")
     def test_retain_grad_hidden_states_attentions(self):
-        # decoder cannot keep gradients
         return
 
+    @unittest.skip
     def test_save_load_fast_init_from_base(self):
         pass

tests/models/bart/test_tokenization_bart.py

@@ -147,6 +147,7 @@ class TestTokenizationBart(TokenizerTesterMixin, unittest.TestCase):
             self.assertTrue((input_ids[:, -1] == tokenizer.eos_token_id).all().item())
             self.assertTrue((labels[:, -1] == tokenizer.eos_token_id).all().item())
 
+    @unittest.skip
     def test_pretokenized_inputs(self):
         pass