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 9989276..b11984e 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
@@ -9,6 +9,7 @@
 
 use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Core\Cache\CacheableResponse;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\user\Entity\User;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -18,6 +19,8 @@
  */
 class DynamicPageCacheTestController {
 
+  use StringTranslationTrait;
+
   /**
    * A route returning a Response object.
    *
@@ -69,7 +72,7 @@ public function html() {
   public function htmlWithCacheContexts(Request $request) {
     $build = $this->html();
     $build['dynamic_part'] = [
-      '#markup' => SafeMarkup::format('Hello there, %animal.', ['%animal' => $request->query->get('animal')]),
+      '#markup' => $this->t('Hello there, %animal.', ['%animal' => $request->query->get('animal')]),
       '#cache' => [
         'contexts' => [
           'url.query_args:animal',
@@ -109,7 +112,7 @@ public function htmlUncacheableMaxAge() {
   public function htmlUncacheableContexts() {
     $build = $this->html();
     $build['very_dynamic_part'] = [
-      '#markup' => t('@username cannot handle the awesomeness of llamas.', ['@username' => \Drupal::currentUser()->getDisplayName()]),
+      '#markup' => $this->t('@username cannot handle the awesomeness of llamas.', ['@username' => \Drupal::currentUser()->getDisplayName()]),
       '#cache' => [
         'contexts' => [
           'user',