diff --git a/core/modules/user/src/Tests/UserPasswordResetTest.php b/core/modules/user/src/Tests/UserPasswordResetTest.php
index 1c89112..f5bd131 100644
--- a/core/modules/user/src/Tests/UserPasswordResetTest.php
+++ b/core/modules/user/src/Tests/UserPasswordResetTest.php
@@ -168,7 +168,7 @@ function testUserPasswordReset() {
     $edit = array('name' => $this->account->getUsername());
     $this->drupalPostForm(NULL, $edit, t('Submit'));
     $old_email_reset_link = $this->getResetURL();
-    $this->account->setEmail(1 . $this->account->getEmail());
+    $this->account->setEmail("1" . $this->account->getEmail());
     $this->account->save();
     $this->drupalGet($old_email_reset_link);
     $this->assertText(t('You have tried to use a one-time login link that has either been used or is no longer valid. Please request a new one using the form below.'), 'One-time link is no longer valid.');