diff --git a/core/modules/system/lib/Drupal/system/Tests/System/CronRunTest.php b/core/modules/system/lib/Drupal/system/Tests/System/CronRunTest.php
index 5e35a15..e27076a 100644
--- a/core/modules/system/lib/Drupal/system/Tests/System/CronRunTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/System/CronRunTest.php
@@ -30,8 +30,6 @@ public static function getInfo() {
    * Test cron runs.
    */
   function testCronRun() {
-    global $base_url;
-
     // Run cron anonymously without any cron key.
     $this->drupalGet('cron');
     $this->assertResponse(404);