diff --git a/templates/blocks/block.html.twig b/templates/blocks/block.html.twig
index fd4fb29600e0a382cf1465081aceaef9b41fc1ec..7793c74802c1ef864fb8dd705f85c4c9c6ac859d 100644
--- a/templates/blocks/block.html.twig
+++ b/templates/blocks/block.html.twig
@@ -45,7 +45,7 @@
     {{ title_prefix }}
     {% if label %}
       {% if heading_level %}
-        <{{ heading_level }}{{ title_attributes }}>{{ label }}</{{ heading_level }}>
+        <{{ heading_level }}{{ title_attributes }} class="block-title">{{ label }}</{{ heading_level }}>
       {% else %}
         <h2{{ title_attributes }}>{{ label }}</h2>
       {% endif %}