diff --git a/tests/mock/sql_insert_buffer.php b/tests/mock/sql_insert_buffer.php
new file mode 100644
index 0000000000..ba09aa8d7f
--- /dev/null
+++ b/tests/mock/sql_insert_buffer.php
@@ -0,0 +1,21 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+class phpbb_mock_sql_insert_buffer extends phpbb_db_sql_insert_buffer
+{
+	public function flush()
+	{
+		return (sizeof($this->buffer)) ? true : false;
+	}
+
+	public function get_buffer()
+	{
+		return $this->buffer;
+	}
+}
diff --git a/tests/notification/convert_test.php b/tests/notification/convert_test.php
index 529b2935e1..ba586b681d 100644
--- a/tests/notification/convert_test.php
+++ b/tests/notification/convert_test.php
@@ -8,6 +8,7 @@
 */
 
 require_once dirname(__FILE__) . '/../../phpBB/includes/db/db_tools.php';
+require_once dirname(__FILE__) . '/../mock/sql_insert_buffer.php';
 
 class phpbb_notification_convert_test extends phpbb_database_test_case
 {