diff --git a/core/modules/user/src/Tests/UserUsernameTest.php b/core/modules/user/src/Tests/UserUsernameTest.php
index 2afe38a..d63e51f 100644
--- a/core/modules/user/src/Tests/UserUsernameTest.php
+++ b/core/modules/user/src/Tests/UserUsernameTest.php
@@ -138,7 +138,8 @@ public function testTruncatedWhosNewName() {
     // Log the users in for them to show up.
     $this->drupalLogin($this->userShortName);
     $this->drupalLogin($this->userLongName);
-    // Log user out to prevent a false negative
+
+    // Log user out to prevent a false negative.
     $this->drupalLogout();
 
     $this->assertText(SafeMarkup::checkPlain($this->userShortName->getUsername()), 'Untruncated username found.');