diff -u b/core/modules/toolbar/toolbar.module b/core/modules/toolbar/toolbar.module
--- b/core/modules/toolbar/toolbar.module
+++ b/core/modules/toolbar/toolbar.module
@@ -309,7 +309,7 @@
  *   The tour which contains the $tour_tips.
  */
 function toolbar_tour_tips_alter(array $tour_tips, EntityInterface $entity) {
-  foreach ($tour_tips as $key => $tour_tip) {
+  foreach ($tour_tips as $tour_tip) {
     if ($tour_tip->get('id') == 'toolbar-search-block') {
       $body = $tour_tip->get('body');
       $body = str_replace('[block.admin_display]', Url::fromRoute('block.admin_display')->toString(), $body);