diff --git a/core/modules/menu_ui/src/Tests/MenuWebTestBase.php b/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
index 79101d442f..192063bbe5 100644
--- a/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
+++ b/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
@@ -2,6 +2,8 @@
 
 namespace Drupal\menu_ui\Tests;
 
+@trigger_error('The ' . __NAMESPACE__ . '\MenuWebTestBase is deprecated in Drupal 8.5.x and will be removed before Drupal 9.0.0. Use the \Drupal\Tests\BrowserTestBase base class and the \Drupal\Tests\menu_ui\Traits\MenuUiTrait trait instead. See https://www.drupal.org/node/2870452.', E_USER_DEPRECATED);
+
 use Drupal\simpletest\WebTestBase;
 use Drupal\Tests\menu_ui\Traits\MenuUiTrait;