diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigEventsTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigEventsTest.php
index 437a813..b24370b 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigEventsTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigEventsTest.php
@@ -69,12 +69,10 @@ function testConfigEvents() {
    * Tests configuration rename event that is fired from the ConfigFactory.
    */
   function testConfigRenameEvent() {
-    global $conf;
-
     $name = 'config_events_test.test';
     $new_name = 'config_events_test.test_rename';
-    $conf[$name] = array('key' => 'overridden');
-    $conf[$new_name] = array('key' => 'new overridden');
+    $GLOBALS['config'][$name] = array('key' => 'overridden');
+    $GLOBALS['config'][$new_name] = array('key' => 'new overridden');
 
     $config = \Drupal::config($name);
     $config->set('key', 'initial')->save();