diff --git a/core/modules/user/src/Tests/UserUsernameTest.php b/core/modules/user/src/Tests/UserUsernameTest.php
index b6ee9b2..1284219 100644
--- a/core/modules/user/src/Tests/UserUsernameTest.php
+++ b/core/modules/user/src/Tests/UserUsernameTest.php
@@ -100,7 +100,7 @@ public function testTruncatedNodeAuthorName() {
 
     // Tests if the username is trimmed to USERNAME_TRIM_LENGTH value.
     // @see template_preprocess_username()
-    $this->assertText(Html::escape($this->userLongName->getUsername()));
+    $this->assertNoText(Html::escape($this->userLongName->getUsername()));
     $this->assertText(Html::escape(Unicode::truncate($this->userLongName->getUsername(), USERNAME_TRIM_LENGTH - 1, FALSE, TRUE)));
   }
 
@@ -116,7 +116,7 @@ public function testTruncatedCommentAuthorName() {
       'comment_body[0][value]' => $this->randomMachineName(20),
     ];
     $this->drupalPostForm('comment/reply/node/' . $node->id() . '/comment', $comment, t('Save'));
-    $this->assertText(Html::escape($this->userLongName->getUsername()));
+    $this->assertText(Html::escape($this->userShortName->getUsername()));
     $this->drupalLogin($this->userLongName);
     $comment = [
       'subject[0][value]' => $this->randomMachineName(),