diff --git a/tests/php/bootstrap.php b/tests/php/bootstrap.php
index d3ee68b5c9..180c7b057b 100644
--- a/tests/php/bootstrap.php
+++ b/tests/php/bootstrap.php
@@ -121,5 +121,6 @@ function skip_translations_api() {
 require_once $_tests_dir . '/includes/bootstrap.php';
 
 require_once __DIR__ . '/includes/classes/factory/CategoryFactory.php';
+require_once __DIR__ . '/includes/classes/factory/CommentFactory.php';
 require_once __DIR__ . '/includes/classes/BaseTestCase.php';
 require_once __DIR__ . '/includes/classes/FeatureTest.php';