def METHOD_NAME(self):
    config, _ = self.model_tester.prepare_config_and_inputs_for_common()
    for model_class in self.all_model_classes:
        model = model_class(config)
        signature = inspect.signature(model.__call__)
        # signature.parameters is an OrderedDict => so arg_names order is deterministic
        arg_names = [*signature.parameters.keys()]
        expected_arg_names = ["pixel_values"]
        self.assertListEqual(arg_names[:1], expected_arg_names)