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 afb7e32..b5af1ba 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Menu/MenuRouterTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Menu/MenuRouterTest.php
@@ -190,7 +190,7 @@ function testMaintenanceModeLoginPaths() {
     $this->drupalGet('test-page');
     $this->assertText($offline_message);
     $this->drupalGet('menu_login_callback');
-    $this->assertText('This is menu_login_callback().', 'Maintenance mode can be bypassed using an event subscriber.');
+    $this->assertText('This is TestControllers::testLogin.', 'Maintenance mode can be bypassed using an event subscriber.');
 
     config('system.maintenance')->set('enabled', 0)->save();
   }
diff --git a/core/modules/system/tests/modules/menu_test/lib/Drupal/menu_test/TestControllers.php b/core/modules/system/tests/modules/menu_test/lib/Drupal/menu_test/TestControllers.php
index 34d42f4..48c2da3 100644
--- a/core/modules/system/tests/modules/menu_test/lib/Drupal/menu_test/TestControllers.php
+++ b/core/modules/system/tests/modules/menu_test/lib/Drupal/menu_test/TestControllers.php
@@ -15,6 +15,13 @@
 class TestControllers {
 
   /**
+   * Returns page to be used as a login path.
+   */
+  public function testLogin() {
+    return 'This is TestControllers::testLogin.';
+  }
+
+  /**
    * Prints out test data.
    */
   public function test1() {
diff --git a/core/modules/system/tests/modules/menu_test/menu_test.module b/core/modules/system/tests/modules/menu_test/menu_test.module
index b5c0c47..5b5cac6 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.module
+++ b/core/modules/system/tests/modules/menu_test/menu_test.module
@@ -314,8 +314,7 @@ function menu_test_menu() {
   // Test the access key with a function callback.
   $items['menu_login_callback'] = array(
     'title' => 'Used as a login path',
-    'page callback' => 'menu_login_callback',
-    'access callback' => TRUE,
+    'route_name' => 'menu_login_callback',
   );
 
   // Test the access key.
@@ -737,18 +736,6 @@ function menu_test_static_variable($value = NULL) {
 }
 
 /**
- * Page callback: Provides a login path.
- *
- * @return string
- *   A text string that can be used for comparison.
- *
- * @see menu_test_menu().
- */
-function menu_login_callback() {
-  return 'This is menu_login_callback().';
-}
-
-/**
  * Title callback: Concatenates the title and case number.
  *
  * @param string $title
diff --git a/core/modules/system/tests/modules/menu_test/menu_test.routing.yml b/core/modules/system/tests/modules/menu_test/menu_test.routing.yml
index 3154626..f6b14ca 100644
--- a/core/modules/system/tests/modules/menu_test/menu_test.routing.yml
+++ b/core/modules/system/tests/modules/menu_test/menu_test.routing.yml
@@ -1,3 +1,9 @@
+menu_login_callback:
+  pattern: '/menu_login_callback'
+  defaults:
+    _content: '\Drupal\menu_test\TestControllers::testLogin'
+  requirements:
+    _access: 'TRUE'
 menu_router_test1:
   pattern: '/foo/{bar}'
   defaults: