public static function tear_down()
    {
        $dbh = Database_ConnectionsHelper::get_root_connection_using_cli();
        $stmt = <<<SQL
DROP TABLE hc_database_test_1;
DROP TABLE hc_database_test_2;
DROP TABLE hc_database_test_3;
SQL;
        mysql_query($stmt, $dbh);
        FileSystem_DirectoryHelper::delete_recursively(self::get_table_specification_directory_name());
    }