diff --git a/t/lib/plugins/Koha/Plugin/TestValuebuilder/test_valuebuilder_popup.tt b/t/lib/plugins/Koha/Plugin/TestValuebuilder/test_valuebuilder_popup.tt
index 93deac4d75..5650a97fb0 100644
--- a/t/lib/plugins/Koha/Plugin/TestValuebuilder/test_valuebuilder_popup.tt
+++ b/t/lib/plugins/Koha/Plugin/TestValuebuilder/test_valuebuilder_popup.tt
@@ -5,7 +5,7 @@
         <title>[% plugin_name | html %] - Valuebuilder</title>
         <meta charset="UTF-8" />
     </head>
-    <body>
+    <body id="test_valuebuilder_popup" class="test_valuebuilder_popup">
         <h1>[% plugin_name | html %]</h1>
         <p>This is a test valuebuilder popup for field: [% field_id | html %]</p>