1 files changed, 30 insertions, 0 deletions
diff --git a/layout/reftests/css-blending/blend-difference-stacking.html b/layout/reftests/css-blending/blend-difference-stacking.html
new file mode 100644
index 0000000000..3c1e55de3e
--- /dev/null
+++ b/layout/reftests/css-blending/blend-difference-stacking.html
@@ -0,0 +1,30 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html>
+<style>
+.a {
+  background-color: rgb(0,255,0);
+}
+#b {
+  width: 200px;
+  height: 210px;
+}
+.c {
+  width: 100px;
+  height: 100px;
+  mix-blend-mode: difference;
+}
+#d {
+  z-index: 1;
+  position: absolute;
+  top:80px;
+}
+</style>
+<div id="b" class="a">
+  <div id="d">.
+    <div class="a c"></div>
+  </div>
+</div>
+</html>