1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/scroll-animations/css/scroll-timeline-default-iframe-ref.html b/testing/web-platform/tests/scroll-animations/css/scroll-timeline-default-iframe-ref.html
new file mode 100644
index 0000000000..1ab5646c8b
--- /dev/null
+++ b/testing/web-platform/tests/scroll-animations/css/scroll-timeline-default-iframe-ref.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<title>Reference for default scroll() timeline</title>
+<iframe width="400" height="400" srcdoc='
+  <html>
+  <style>
+    html {
+      min-height: 100%;
+      padding-bottom: 100px;
+    }
+
+    #box {
+      width: 100px;
+      height: 100px;
+      background-color: green;
+      transform: translateY(100px);
+    }
+
+    * {
+      margin-top: 0px;
+      margin-bottom: 0px;
+    }
+  </style>
+  <script>
+    window.addEventListener("load", function() {
+      // Move the scroller to halfway.
+      const scroller = document.scrollingElement;
+      const maxScroll = scroller.scrollHeight - scroller.clientHeight;
+      scroller.scrollTop = 0.5 * maxScroll;
+    });
+  </script>
+  <div id="box"></div>
+  </html>
+'></iframe>