diff --git a/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerExistingSettingsTest.php b/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerExistingSettingsTest.php
index d0d998b..2b765a5 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerExistingSettingsTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerExistingSettingsTest.php
@@ -35,7 +35,7 @@ public static function getInfo() {
   protected function setUp() {
     // Pre-configure hash salt.
     // Any string is valid, so simply use the class name of this test.
-    $this->settings['hash_salt'] = (object) array(
+    $this->settings['settings']['hash_salt'] = (object) array(
       'value' => __CLASS__,
       'required' => TRUE,
     );