diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php
index 223c69d4ed..e69329cb5f 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationUITestBase.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\Tests\content_translation\Functional;
 
+use Drupal\Component\Render\FormattableMarkup;
 use Drupal\Core\Cache\Cache;
 use Drupal\Core\Entity\EntityChangedInterface;
 use Drupal\Core\Entity\EntityInterface;
@@ -226,10 +227,10 @@ protected function doTestTranslationOverview() {
         $language = new Language(['id' => $langcode]);
         $view_url = $entity->url('canonical', ['language' => $language]);
         $elements = $this->xpath('//table//a[@href=:href]', [':href' => $view_url]);
-        $this->assertEqual($elements[0]->getText(), $entity->getTranslation($langcode)->label(), format_string('Label correctly shown for %language translation.', ['%language' => $langcode]));
+        $this->assertEqual($elements[0]->getText(), $entity->getTranslation($langcode)->label(), new FormattableMarkup('Label correctly shown for %language translation.', ['%language' => $langcode]));
         $edit_path = $entity->url('edit-form', ['language' => $language]);
         $elements = $this->xpath('//table//ul[@class="dropbutton"]/li/a[@href=:href]', [':href' => $edit_path]);
-        $this->assertEqual($elements[0]->getText(), t('Edit'), format_string('Edit link correct for %language translation.', ['%language' => $langcode]));
+        $this->assertEqual($elements[0]->getText(), t('Edit'), new FormattableMarkup('Edit link correct for %language translation.', ['%language' => $langcode]));
       }
     }
   }