diff --git a/core/modules/system/templates/maintenance-task-list.html.twig b/core/modules/system/templates/maintenance-task-list.html.twig
index 51ee57a..649cfa6 100644
--- a/core/modules/system/templates/maintenance-task-list.html.twig
+++ b/core/modules/system/templates/maintenance-task-list.html.twig
@@ -15,7 +15,7 @@
  */
 #}
 <h2 class="visually-hidden">Installation tasks</h2>
-<ol>
+<ol class="task-list">
 {% for task in tasks %}
   <li{{ task.attributes }}>
     {{ task.item }}