diff --git a/core/themes/classy/templates/navigation/menu-local-task.html.twig b/core/themes/classy/templates/navigation/menu-local-task.html.twig
index 66e3267..5486f7d 100644
--- a/core/themes/classy/templates/navigation/menu-local-task.html.twig
+++ b/core/themes/classy/templates/navigation/menu-local-task.html.twig
@@ -14,4 +14,4 @@
  * @see template_preprocess_menu_local_task()
  */
 #}
-<li{{ attributes.addClass(active ? 'active') }}>{{ link }}</li>
+<li{{ attributes.addClass(active ? 'is-active') }}>{{ link }}</li>