diff --git a/tests/codeception/config/config.php b/tests/codeception/config/config.php
index ffc416b..d4e1f77 100644
--- a/tests/codeception/config/config.php
+++ b/tests/codeception/config/config.php
@@ -3,6 +3,7 @@
  * Application configuration shared by all test types
  */
 return [
+    'language' => 'en-US',
     'controllerMap' => [
         'fixture' => [
             'class' => 'yii\faker\FixtureController',