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diff --git a/testing/web-platform/tests/webgl/conformance-1.0.3/conformance/canvas/buffer-preserve-test.html b/testing/web-platform/tests/webgl/conformance-1.0.3/conformance/canvas/buffer-preserve-test.html
new file mode 100644
index 000000000..4e232838e
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+++ b/testing/web-platform/tests/webgl/conformance-1.0.3/conformance/canvas/buffer-preserve-test.html
@@ -0,0 +1,89 @@
+<!--
+
+/*
+** Copyright (c) 2012 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+-->
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>WebGL required buffer clear behaviour test</title>
+<link rel="stylesheet" href="../../resources/js-test-style.css"/>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="../../resources/js-test-pre.js"></script>
+<script src="../resources/webgl-test-utils.js"> </script>
+<style type="text/css">
+body {
+    height: 3000px;
+}
+</style>
+</head>
+<body>
+<!-- Important to put the canvas at the top so that it's always visible even in the test suite runner.
+     Otherwise it just doesn't get composited in Firefox. -->
+<canvas width="20" height="20" style="border: 1px solid blue;" id="c"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script type="text/javascript">
+"use strict";
+
+description("This test ensures WebGL implementations correctly clear the drawing buffer " +
+            "on composite if preserveDrawingBuffer is false.");
+debug("");
+
+var wtu = WebGLTestUtils;
+
+var gl = wtu.create3DContext("c");
+shouldBeTrue("gl != null");
+shouldBeTrue('gl.getContextAttributes().preserveDrawingBuffer == false');
+
+gl.clearColor(1, 0, 0, 1);
+gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT);
+
+// enable scissor here, before compositing, to make sure it's correctly
+// ignored and restored
+gl.scissor(0, 10, 10, 10);
+gl.enable(gl.SCISSOR_TEST);
+
+function clear() {
+    // scissor was set earlier
+    gl.clearColor(0, 0, 1, 1);
+    gl.clear(gl.COLOR_BUFFER_BIT);
+
+    wtu.checkCanvasRect(gl, 0, 10, 10, 10, [0, 0, 255, 255],
+        "cleared corner should be blue, stencil should be preserved");
+    wtu.checkCanvasRect(gl, 0, 0, 10, 10, [0, 0, 0, 0],
+        "remainder of buffer should be cleared");
+
+    finishTest();
+    return;
+}
+
+wtu.waitForComposite(clear);
+
+var successfullyParsed = true;
+</script>
+</body>
+</html>