diff --git a/core/modules/system/lib/Drupal/system/Tests/Menu/MenuRouterTest.php b/core/modules/system/lib/Drupal/system/Tests/Menu/MenuRouterTest.php
index eff1596..28e3694 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Menu/MenuRouterTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Menu/MenuRouterTest.php
@@ -501,9 +501,6 @@ public function testThemeIntegration() {
     $this->doTestThemeCallbackAdministrative();
 
     $this->initializeTestThemeConfiguration();
-    $this->doTestThemeCallbackInheritance();
-
-    $this->initializeTestThemeConfiguration();
     $this->doTestThemeCallbackNoThemeRequested();
 
     $this->initializeTestThemeConfiguration();