diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php
index a22db8a99c..4cedab0db9 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\LegacyPdoSessionHandler;
+use Symfony\Component\HttpFoundation\Tests\ClockMockTestCase;
 
 /**
  * @group legacy