Fix test_t5_decoder_model_past_large_inputs (#17320)

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

tests/models/t5/test_modeling_tf_t5.py

@@ -295,6 +295,13 @@ class TFT5ModelTest(TFModelTesterMixin, unittest.TestCase):
 
     def test_t5_decoder_model_past_large_inputs(self):
         config_and_inputs = self.model_tester.prepare_config_and_inputs()
+
+        # `create_and_check_t5_decoder_model_past_large_inputs` has special inputs:
+        #     (config, input_ids, decoder_input_ids, attention_mask)
+        # and we have to prepare it correctly here.
+        config, input_ids, input_mask, token_labels = config_and_inputs
+        config_and_inputs = (config, input_ids, None, input_mask)
+
         self.model_tester.create_and_check_t5_decoder_model_past_large_inputs(*config_and_inputs)
 
     def test_t5_model_xla_generate_fast(self):