diff --git a/core/modules/dynamic_page_cache/tests/dynamic_page_cache_test/src/DynamicPageCacheTestController.php b/core/modules/dynamic_page_cache/tests/dynamic_page_cache_test/src/DynamicPageCacheTestController.php
index 43b7c03..9989276 100644
--- a/core/modules/dynamic_page_cache/tests/dynamic_page_cache_test/src/DynamicPageCacheTestController.php
+++ b/core/modules/dynamic_page_cache/tests/dynamic_page_cache_test/src/DynamicPageCacheTestController.php
@@ -109,7 +109,7 @@ public function htmlUncacheableMaxAge() {
   public function htmlUncacheableContexts() {
     $build = $this->html();
     $build['very_dynamic_part'] = [
-      '#markup' => \Drupal::currentUser()->getUsername() . ' cannot handle the awesomeness of llamas.',
+      '#markup' => t('@username cannot handle the awesomeness of llamas.', ['@username' => \Drupal::currentUser()->getDisplayName()]),
       '#cache' => [
         'contexts' => [
           'user',