diff --git a/core/modules/comment/templates/comment-wrapper.html.twig b/core/modules/comment/templates/comment-wrapper.html.twig
index b19c05154301a144b76f340a29c4166a26055485..52bb6b1c61b4b4a285108a628ca4857ae7effbcb 100644
--- a/core/modules/comment/templates/comment-wrapper.html.twig
+++ b/core/modules/comment/templates/comment-wrapper.html.twig
@@ -45,7 +45,7 @@
   {{ comments }}
 
   {% if form %}
-    <h2 class="title comment-form">{{ 'Add new comment'|t }}</h2>
+    <h2 class="title comment-form__title">{{ 'Add new comment'|t }}</h2>
     {{ form }}
   {% endif %}