diff --git a/core/modules/datetime/src/Tests/DateRangeFieldTest.php b/core/modules/datetime/src/Tests/DateRangeFieldTest.php
index 3ba2533..f2e4f90 100644
--- a/core/modules/datetime/src/Tests/DateRangeFieldTest.php
+++ b/core/modules/datetime/src/Tests/DateRangeFieldTest.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\datetime\Tests;
 
+use Drupal\Component\Render\FormattableMarkup;
 use Drupal\Component\Utility\SafeMarkup;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Datetime\DrupalDateTime;
@@ -1089,7 +1090,7 @@ public function testInvalidField() {
       "{$field_name}[0][value2][time]" => '12:00:00',
     ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('The @title end date cannot be before the start date', ['@title' => $field_name]), 'End date before start date has been caught.');
+    $this->assertText(new FormattableMarkup('The @title end date cannot be before the start date', ['@title' => $field_name]), 'End date before start date has been caught.');
 
     $edit = [
       "{$field_name}[0][value][date]" => '2012-12-01',
@@ -1098,7 +1099,7 @@ public function testInvalidField() {
       "{$field_name}[0][value2][time]" => '11:00:00',
     ];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('The @title end date cannot be before the start date', ['@title' => $field_name]), 'End time before start time has been caught.');
+    $this->assertText(new FormattableMarkup('The @title end date cannot be before the start date', ['@title' => $field_name]), 'End time before start time has been caught.');
   }
 
   /**