Does this fix tests?

Author: iMattPro

manifest.php

@@ -14,7 +14,7 @@
 /**
 * @ignore
 **/
-define('IN_PHPBB', true);
+const IN_PHPBB = true;
 $phpbb_root_path = ((defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './') . '../../../';
 $phpEx = substr(strrchr(__FILE__, '.'), 1);
 include($phpbb_root_path . 'common.' . $phpEx);