diff --git a/core/modules/comment/src/Tests/CommentAnonymousTest.php b/core/modules/comment/src/Tests/CommentAnonymousTest.php
index b7e5bd8..b67dd3c 100644
--- a/core/modules/comment/src/Tests/CommentAnonymousTest.php
+++ b/core/modules/comment/src/Tests/CommentAnonymousTest.php
@@ -48,7 +48,7 @@ function testAnonymous() {
     $edit['comment_body[0][value]'] = $body;
     $this->drupalPostForm($this->node->urlInfo(), $edit, t('Preview'));
     // Cannot use assertRaw here since both title and body are in the form.
-    $preview = (string) $this->cssSelect('.preview')[0]->asXML();
+    $preview = (string) $this->cssSelect('.comment.by-anonymous')[0]->asXML();
     $this->assertTrue(strpos($preview, $title) !== FALSE, 'Anonymous user can preview comment title.');
     $this->assertTrue(strpos($preview, $body) !== FALSE, 'Anonymous user can preview comment body.');