diff --git a/tests/src/Functional/EmailRegistrationTestCase.php b/tests/src/Functional/EmailRegistrationTestCase.php
index 22e6786..d9a0ce4 100644
--- a/tests/src/Functional/EmailRegistrationTestCase.php
+++ b/tests/src/Functional/EmailRegistrationTestCase.php
@@ -54,7 +54,7 @@ class EmailRegistrationTestCase extends BrowserTestBase {
 
     // Really basic confirmation that the user was created and logged in.
     $account = user_load_by_mail($register['mail']);
-    $this->assertSession()->responseContains('<title>' . $name . ' ' . $account->id() . ' | Drupal</title>');
+    $this->assertSession()->responseContains('<title>' . $name . '_' . $account->id() . ' | Drupal</title>');
 
     // Now try the immediate login.
     $this->drupalLogout();