diff --git a/layout/reftests/async-scrolling/group-opacity-surface-size-1-ref.html b/layout/reftests/async-scrolling/group-opacity-surface-size-1-ref.html
new file mode 100644
index 000000000000..12b6ee367a8d
--- /dev/null
+++ b/layout/reftests/async-scrolling/group-opacity-surface-size-1-ref.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<style>
+
+body {
+  margin: 0;
+  overflow: hidden;
+}
+
+.opacity {
+  opacity: 0.8;
+}
+
+.box {
+  left: 0;
+  top: 200px;
+  width: 200px;
+  height: 200px;
+}
+
+.absolute {
+  position: absolute;
+  background: green;
+  top: 100px;
+}
+
+.fixed {
+  position: absolute;
+  background: blue;
+}
+
+</style>
+
+<div class="opacity">
+  <div class="box absolute"></div>
+  <div class="box fixed"></div>
+</div>
diff --git a/layout/reftests/async-scrolling/group-opacity-surface-size-1.html b/layout/reftests/async-scrolling/group-opacity-surface-size-1.html
new file mode 100644
index 000000000000..e37626694a85
--- /dev/null
+++ b/layout/reftests/async-scrolling/group-opacity-surface-size-1.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html reftest-async-scroll
+      reftest-displayport-x="0" reftest-displayport-y="0"
+      reftest-displayport-w="800" reftest-displayport-h="2000"
+      reftest-async-scroll-x="0" reftest-async-scroll-y="100">
+<style>
+
+body {
+  margin: 0;
+  overflow: hidden;
+  height: 4000px;
+}
+
+.opacity {
+  opacity: 0.8;
+}
+
+.box {
+  left: 0;
+  top: 200px;
+  width: 200px;
+  height: 200px;
+}
+
+.absolute {
+  position: absolute;
+  background: green;
+}
+
+.fixed {
+  position: fixed;
+  background: blue;
+}
+
+</style>
+
+<div class="opacity">
+  <div class="box absolute"></div>
+  <div class="box fixed"></div>
+</div>
diff --git a/layout/reftests/async-scrolling/reftest.list b/layout/reftests/async-scrolling/reftest.list
index cf48b3546953..ddc66f18e238 100644
--- a/layout/reftests/async-scrolling/reftest.list
+++ b/layout/reftests/async-scrolling/reftest.list
@@ -28,6 +28,7 @@ skip-if(!asyncPan) == culling-1.html culling-1-ref.html
 skip-if(!asyncPan) == position-fixed-iframe-1.html position-fixed-iframe-1-ref.html
 skip-if(!asyncPan) == position-fixed-iframe-2.html position-fixed-iframe-2-ref.html
 skip-if(!asyncPan) == position-fixed-in-scroll-container.html position-fixed-in-scroll-container-ref.html
+fuzzy(1,60000) skip-if(!asyncPan) == group-opacity-surface-size-1.html group-opacity-surface-size-1-ref.html
 
 # for the following tests, we want to disable the low-precision buffer
 # as it will expand the displayport beyond what the test specifies in
