diff --git a/test/test_footnotes.rb b/test/test_footnotes.rb
index 7cdfd93a..0e00a913 100644
--- a/test/test_footnotes.rb
+++ b/test/test_footnotes.rb
@@ -13,7 +13,7 @@ def test_to_html
       <section class="footnotes" data-footnotes>
       <ol>
       <li id="fn-hi">
-      <p>Hey! <a href="#fnref-hi" class="footnote-backref" data-footnote-backref aria-label="Back to content">↩</a></p>
+      <p>Hey! <a href="#fnref-hi" class="footnote-backref" data-footnote-backref data-footnote-backref-idx="1" aria-label="Back to reference 1">↩</a></p>
       </li>
       </ol>
       </section>
@@ -50,7 +50,7 @@ def test_render_html
       <section class="footnotes" data-footnotes>
       <ol>
       <li id="fn-1">
-      <p>This is a footnote <a href="#fnref-1" class="footnote-backref" data-footnote-backref aria-label="Back to content">↩</a></p>
+      <p>This is a footnote <a href="#fnref-1" class="footnote-backref" data-footnote-backref data-footnote-backref-idx="1" aria-label="Back to reference 1">↩</a></p>
       </li>
       </ol>
       </section>