diff --git a/core/modules/system/templates/vertical-tabs.html.twig b/core/modules/system/templates/vertical-tabs.html.twig
index 6981bc6..5b7298b 100644
--- a/core/modules/system/templates/vertical-tabs.html.twig
+++ b/core/modules/system/templates/vertical-tabs.html.twig
@@ -12,4 +12,4 @@
  * @ingroup themeable
  */
 #}
-<div data-vertical-tabs-panes {{ attributes }}>{{ children }}</div>
+<div data-vertical-tabs-panes{{ attributes }}>{{ children }}</div>