diff --git a/layout/reftests/pixel-rounding/green-circle-with-blue-border.png b/layout/reftests/pixel-rounding/green-circle-with-blue-border.png
new file mode 100644
index 00000000000..570fd24944a
Binary files /dev/null and b/layout/reftests/pixel-rounding/green-circle-with-blue-border.png differ
diff --git a/layout/reftests/pixel-rounding/image-high-quality-scaling-1-ref.html b/layout/reftests/pixel-rounding/image-high-quality-scaling-1-ref.html
new file mode 100644
index 00000000000..62df7fa5116
--- /dev/null
+++ b/layout/reftests/pixel-rounding/image-high-quality-scaling-1-ref.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <script>
+    // We add an artificial delay before the reftest snapshot to increase the
+    // chance that we're snapshotting the high-quality downscaled version of
+    // the image. This is necessary because high-quality downscaling is
+    // currently an async process. Bug 1045926 will eliminate the need for this
+    // delay.
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<body onload="setTimeout(snapshot, 250)">
+<div style="padding: 1em 3em; font-size: 80%; width: 300px; text-align: center;">
+  <img src="green-circle-with-blue-border.png" width="179" height="220">
+</div>
+</body>
+</html>
diff --git a/layout/reftests/pixel-rounding/image-high-quality-scaling-1.html b/layout/reftests/pixel-rounding/image-high-quality-scaling-1.html
new file mode 100644
index 00000000000..e3d14a61f93
--- /dev/null
+++ b/layout/reftests/pixel-rounding/image-high-quality-scaling-1.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <script>
+    // We add an artificial delay before the reftest snapshot to increase the
+    // chance that we're snapshotting the high-quality downscaled version of
+    // the image. This is necessary because high-quality downscaling is
+    // currently an async process. Bug 1045926 will eliminate the need for this
+    // delay.
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<body onload="setTimeout(snapshot, 250)">
+<div style="padding: 1em 3em; font-size: 80%; width: 300px; text-align: center;">
+  <img src="green-circle-with-blue-border.png" height="220">
+</div>
+</body>
+</html>
diff --git a/layout/reftests/pixel-rounding/reftest.list b/layout/reftests/pixel-rounding/reftest.list
index 5a775b41570..42b9bfda539 100644
--- a/layout/reftests/pixel-rounding/reftest.list
+++ b/layout/reftests/pixel-rounding/reftest.list
@@ -123,6 +123,10 @@ fails == collapsed-border-top-6.html border-top-10-ref.html
 == image-width-left-5.html image-width-5.html
 == image-width-left-6.html image-width-6.html
 
+
+skip pref(image.high_quality_downscaling.enabled,true) == image-high-quality-scaling-1.html image-high-quality-scaling-1-ref.html
+
+
 != offscreen-0-ref.html offscreen-10-ref.html
 == offscreen-background-color-pos-4.html offscreen-0-ref.html
 == offscreen-background-color-pos-5.html offscreen-10-ref.html
