def test_pre_update_validate_change_property_name(self):
        expected_suggestion_dict = self.suggestion_dict
        suggestion = suggestion_registry.SuggestionEditStateContent(
            expected_suggestion_dict['suggestion_id'],
            expected_suggestion_dict['target_id'],
            expected_suggestion_dict['target_version_at_submission'],
            expected_suggestion_dict['status'], self.author_id,
            self.reviewer_id, expected_suggestion_dict['change'],
            expected_suggestion_dict['score_category'],
            expected_suggestion_dict['language_code'], False, self.fake_date)

        change = {
            'cmd': exp_domain.CMD_EDIT_STATE_PROPERTY,
            'property_name': exp_domain.STATE_PROPERTY_PARAM_CHANGES,
            'state_name': suggestion.change.state_name,
            'new_value': 'new suggestion content',
            'old_value': None
        }
        with self.assertRaisesRegex(
            utils.ValidationError,
            'The new change property_name must be equal to content'
        ):
            suggestion.pre_update_validate(exp_domain.ExplorationChange(change))