diff --git a/core/modules/tracker/lib/Drupal/tracker/Controller/TrackerUserTab.php b/core/modules/tracker/lib/Drupal/tracker/Controller/TrackerUserTab.php
index cb595f7..49a7574 100644
--- a/core/modules/tracker/lib/Drupal/tracker/Controller/TrackerUserTab.php
+++ b/core/modules/tracker/lib/Drupal/tracker/Controller/TrackerUserTab.php
@@ -28,6 +28,6 @@ public function getContent(UserInterface $user) {
    * Title callback for the tracker.user_tab route.
    */
   public function getTitle(UserInterface $user) {
-    return String::checkPlain(user_format_name($user));
+    return String::checkPlain($user->getUsername());
   }
 }