diff --git a/layout/reftests/pixel-rounding/green-circle-with-blue-border.png b/layout/reftests/pixel-rounding/green-circle-with-blue-border.png
deleted file mode 100644
index 570fd24944a8..000000000000
Binary files a/layout/reftests/pixel-rounding/green-circle-with-blue-border.png and /dev/null 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
deleted file mode 100644
index 62df7fa51163..000000000000
--- a/layout/reftests/pixel-rounding/image-high-quality-scaling-1-ref.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!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
deleted file mode 100644
index e3d14a61f930..000000000000
--- a/layout/reftests/pixel-rounding/image-high-quality-scaling-1.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!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 5dc55cde480c..5a775b41570f 100644
--- a/layout/reftests/pixel-rounding/reftest.list
+++ b/layout/reftests/pixel-rounding/reftest.list
@@ -123,10 +123,6 @@ 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
 
-
-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
