diff --git a/test/libraries/PMA_server_engines_test.php b/test/libraries/PMA_server_engines_test.php
index f02ad42de7..8bc7a634d1 100644
--- a/test/libraries/PMA_server_engines_test.php
+++ b/test/libraries/PMA_server_engines_test.php
@@ -9,12 +9,17 @@
 /*
  * Include to test.
  */
+
+if (! defined('PMA_DRIZZLE')) {
+	define('PMA_DRIZZLE', 0);
+}
+
 require_once 'libraries/Util.class.php';
 require_once 'libraries/php-gettext/gettext.inc';
 require_once 'libraries/url_generating.lib.php';
 require_once 'libraries/server_engines.lib.php';
 require_once 'libraries/Theme.class.php';
-require_once 'libraries/database_interface.inc.php';
+require_once 'libraries/DatabaseInterface.class.php';
 require_once 'libraries/Message.class.php';
 require_once 'libraries/sanitizing.lib.php';
 require_once 'libraries/sqlparser.lib.php';