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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/misc/delayed-drawing.html b/dom/canvas/test/webgl-conf/checkout/conformance/misc/delayed-drawing.html
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index 0000000000..4dc9ea8f3a
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+<!--
+Copyright (c) 2019 The Khronos Group Inc.
+Use of this source code is governed by an MIT-style license that can be
+found in the LICENSE.txt file.
+-->
+
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>WebGL Delayed Drawing test.</title>
+<link rel="stylesheet" href="../../resources/js-test-style.css"/>
+<script src="../../js/js-test-pre.js"></script>
+<script src="../../js/webgl-test-utils.js"> </script>
+</head>
+<body>
+<canvas id="example" width="4" height="4" style="width: 40px; height: 30px;"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script>
+"use strict";
+enableJSTestPreVerboseLogging();
+description(document.title);
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext("example");
+var program = wtu.setupTexturedQuad(gl);
+
+wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
+
+var tex = gl.createTexture();
+wtu.fillTexture(gl, tex, 5, 3, [0, 192, 128, 255]);
+
+var loc = gl.getUniformLocation(program, "tex");
+gl.uniform1i(loc, 0);
+
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+
+
+drawAndCheck();
+
+setTimeout(step2, 1000);
+
+function step2() {
+  drawAndCheck();
+  finishTest();
+}
+
+function drawAndCheck() {
+  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors before drawing.");
+  wtu.clearAndDrawUnitQuad(gl);
+  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from drawing.");
+  wtu.checkCanvas(
+      gl, [0, 192, 128, 255],
+      "draw should be 0, 192, 128, 255");
+}
+
+var successfullyParsed = true;
+</script>
+</body>
+</html>
+