diff --git a/cms/templates/js/content-group-details.underscore b/cms/templates/js/content-group-details.underscore
index 041439f7e4..5827c0f9c8 100644
--- a/cms/templates/js/content-group-details.underscore
+++ b/cms/templates/js/content-group-details.underscore
@@ -32,7 +32,7 @@
             </li>
         <% } else { %>
             <li class="action action-delete wrapper-delete-button" data-tooltip="<%- gettext('Cannot delete when in use by a unit') %>">
-                <button class="delete action-icon is-disabled" aria-disabled="true" disabled="disabled" title="<%- gettext('Delete') %>"><span class="icon fa fa-trash-o" aria-hidden="true"></span></button>
+                <button class="delete action-icon is-disabled" disabled="disabled" title="<%- gettext('Delete') %>"><span class="icon fa fa-trash-o" aria-hidden="true"></span></button>
             </li>
         <% } %>
     </ul>
diff --git a/cms/templates/js/group-configuration-details.underscore b/cms/templates/js/group-configuration-details.underscore
index d6e989bab8..8310a2a657 100644
--- a/cms/templates/js/group-configuration-details.underscore
+++ b/cms/templates/js/group-configuration-details.underscore
@@ -50,7 +50,7 @@
             </li>
         <% } else { %>
             <li class="action action-delete wrapper-delete-button" data-tooltip="<%- gettext('Cannot delete when in use by an experiment') %>">
-                <button class="delete action-icon is-disabled" aria-disabled="true" aria-hidden="true" title="<%- gettext('Delete') %>"><span class="icon fa fa-trash-o"></span></button>
+                <button class="delete action-icon is-disabled" disabled="disabled" title="<%- gettext('Delete') %>"><span class="icon fa fa-trash-o" aria-hidden="true"></span></button>
             </li>
         <% } %>
     </ul>