def delete_table(cls):
        """
        delete_table

        Manually delete a temporary table for model in test data base.
        :return:
        """
        schema_editor = getattr(connection, 'schema_editor', None)
        if schema_editor:
            with connection.schema_editor() as schema_editor:
                schema_editor.delete_model(cls)
        else:
            cursor = connection.cursor()
            try:
                with warnings.catch_warnings():
                    warnings.filterwarnings('ignore', 'unknown table')
                    cursor.execute('DROP TABLE IF EXISTS {0}'.format(cls._meta.db_table))
            finally:
                cursor.close()