def matrix_type(request):
    return request.param
def test_validate_change_skill_difficulty_invalid_value(self):
        expected_suggestion_dict = self.suggestion_dict
        suggestion = suggestion_registry.SuggestionAddQuestion(
            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)
        suggestion.validate()

        suggestion.change.skill_difficulty = 0.4

        with self.assertRaisesRegex(
            utils.ValidationError,
            'Expected change skill_difficulty to be one of '
        ):
            suggestion.validate()