diff -u b/core/modules/views/templates/views-view-summary-unformatted.html.twig b/core/modules/views/templates/views-view-summary-unformatted.html.twig
--- b/core/modules/views/templates/views-view-summary-unformatted.html.twig
+++ b/core/modules/views/templates/views-view-summary-unformatted.html.twig
@@ -25,10 +25,7 @@
   {% if row.separator -%}
     {{ row.separator }}
   {%- endif %}
-  {% if row.active %}
-    {% set row.attributes = row.attributes.addClass('active') %}
-  {% endif %}
-  <a href="{{ row.url }}"{{ row.attributes }}>{{ row.link }}</a>
+  <a href="{{ row.url }}"{{ row.attributes.addClass(row.active ? 'active' }}>{{ row.link }}</a>
   {% if options.count %}
     ({{ row.count }})
   {% endif %}