diff --git a/tests/ControllerTest.php b/tests/ControllerTest.php
index ec32398..ee3ce16 100644
--- a/tests/ControllerTest.php
+++ b/tests/ControllerTest.php
@@ -6,6 +6,7 @@
 
 namespace Alltube\Test;
 
+use Alltube\Locale;
 use Alltube\Controller\BaseController;
 use Alltube\Controller\DownloadController;
 use Alltube\Controller\FrontController;
@@ -34,6 +35,8 @@ abstract class ControllerTest extends ContainerTest
     {
         parent::setUp();
 
+        $this->container->get('locale')->setLocale(new Locale('en_US'));
+
         $frontController = new FrontController($this->container);
         $downloadController = new DownloadController($this->container);