diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigLanguageOverride.php b/core/modules/config/lib/Drupal/config/Tests/ConfigLanguageOverride.php
index e0cec21..4d7bdf9 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigLanguageOverride.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigLanguageOverride.php
@@ -32,8 +32,7 @@ public static function getInfo() {
 
   public function setUp() {
     parent::setUp();
-    config_install_default_config('module', 'config_test');
-    config_install_default_config('module', 'locale');
+    $this->installConfig(array('config_test'));
     \Drupal::configFactory()->setLanguage(language_default());
   }