diff --git a/Tests/LibWeb/Ref/svg-alpha-mask.html b/Tests/LibWeb/Ref/svg-alpha-mask.html
new file mode 100644
index 0000000000..c6172a2cd6
--- /dev/null
+++ b/Tests/LibWeb/Ref/svg-alpha-mask.html
@@ -0,0 +1,11 @@
+<link rel="match" href="reference/simple-svg-mask-ref.html" />
+<svg width="200" viewBox="-10 -10 120 120">
+  <defs>
+    <mask id="myMask" style="mask-type:alpha">
+      <!-- Everything solid pixel (alpha=255) will be visible -->
+      <rect x="50" y="0" width="50" height="100" fill="black" />
+    </mask>
+  </defs>
+  <rect x="-10" y="-10" width="120" height="120" fill="blue" />
+  <rect x="10" y="10" width="80" height="80" fill="red" mask="url(#myMask)" />
+</svg>