diff --git a/test/test.html b/test/test.html
index 0acdfc5..3bfb35b 100644
--- a/test/test.html
+++ b/test/test.html
@@ -67,7 +67,7 @@ <h2>Text link</h2>
       <div class="flex__12">
         <a href="./images/2-1200.webp"
            class="lightbox"
-           data-group="Netherlands">
+           data-group="textlink">
            Picturesque house facades in Leiden.
         </a>
       </div>
@@ -75,7 +75,7 @@ <h2>Text link</h2>
       <div class="flex__12">
         <a href="./images/3-1200.webp"
            class="lightbox"
-           data-group="Netherlands"
+           data-group="textlink"
            data-caption="A day trip to Leiden on our vacation in the Netherlands.">
            The river 'Oude Rijn' in Leiden.
         </a>
@@ -84,7 +84,7 @@ <h2>Text link</h2>
       <div class="flex__12">
         <a href="./images/1337.webp"
            class="lightbox"
-           data-group="Netherlands">
+           data-group="textlink">
            This link causes an error
         </a>
       </div>