diff --git a/core/modules/user/src/Tests/UserBlocksTest.php b/core/modules/user/src/Tests/UserBlocksTest.php
index 830b87a..d9b9fb7 100644
--- a/core/modules/user/src/Tests/UserBlocksTest.php
+++ b/core/modules/user/src/Tests/UserBlocksTest.php
@@ -8,6 +8,7 @@
 namespace Drupal\user\Tests;
 
 use Drupal\Component\Utility\SafeMarkup;
+use Drupal\Core\Render\SafeString;
 use Drupal\simpletest\WebTestBase;
 
 /**
@@ -50,7 +51,7 @@ function testUserLoginBlock() {
     $edit['pass'] = $this->randomMachineName();
     $this->drupalPostForm('node', $edit, t('Log in'));
     $this->assertRaw(\Drupal::translation()->formatPlural(1, '1 error has been found: !errors', '@count errors have been found: !errors', [
-      '!errors' => SafeMarkup::set('<a href="#edit-name">Username</a>')
+      '!errors' => SafeString::create('<a href="#edit-name">Username</a>')
     ]));
     $this->assertText(t('Sorry, unrecognized username or password.'));