def METHOD_NAME(self) -> None:
    """Test case to check behaviour of new arg key name."""
    sample_arg_schema = {
        'schema': {
            'new_key_for_argument': 'sample_new_arg_name'
        }
    }
    new_key_name = payload_validator.get_corresponding_key_for_object(
        sample_arg_schema)
    self.assertEqual(new_key_name, 'sample_new_arg_name')