diff --git a/core/themes/classy/templates/vertical-tabs.html.twig b/core/themes/classy/templates/vertical-tabs.html.twig
new file mode 100644
index 0000000..5b7298b
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+++ b/core/themes/classy/templates/vertical-tabs.html.twig
@@ -0,0 +1,15 @@
+{#
+/**
+ * @file
+ * Default theme implementation for vertical tabs.
+ *
+ * Available variables
+ * - attributes: A list of HTML attributes for the wrapper element.
+ * - children: The rendered checkboxes.
+ *
+ * @see template_preprocess_vertical_tabs()
+ *
+ * @ingroup themeable
+ */
+#}
+<div data-vertical-tabs-panes{{ attributes }}>{{ children }}</div>