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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/programs/gl-shader-test.html b/dom/canvas/test/webgl-conf/checkout/conformance/programs/gl-shader-test.html
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@@ -0,0 +1,94 @@
+<!--
+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 ShaderL Conformance Tests</title>
+<link rel="stylesheet" href="../../resources/js-test-style.css"/>
+<script src="../../js/desktop-gl-constants.js"></script>
+<script src="../../js/js-test-pre.js"></script>
+<script src="../../js/webgl-test-utils.js"></script>
+</head>
+<body>
+<script id="vs" type="x-shader/x-fragment">
+attribute vec4 vPosition;
+varying vec2 texCoord;
+void main() {
+    gl_Position = vPosition;
+    texCoord = vPosition.xy * 0.5 + 0.5;
+}
+</script>
+<script id="fs-green" type="x-shader/x-fragment">
+precision mediump float;
+void main() {
+    gl_FragData[0] = vec4(0, 1, 0, 1);
+}
+</script>
+<script id="fs-red" type="x-shader/x-fragment">
+precision mediump float;
+void main() {
+    gl_FragData[0] = vec4(1, 0, 0, 1);
+}
+</script>
+<div id="description"></div>
+<div id="console"></div>
+<canvas id="canvas" width="2" height="2"> </canvas>
+<script>
+"use strict";
+description("This test checks a few things about WebGL Shaders.");
+
+debug("");
+debug("Canvas.getContext");
+
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext("canvas");
+if (!gl) {
+  testFailed("context does not exist");
+} else {
+  testPassed("context exists");
+
+  debug("");
+  debug("Checking shaders.");
+
+  // Create the shader object
+  var shader = gl.createShader(desktopGL['GEOMETRY_SHADER_ARB']);
+  assertMsg(shader == null,
+            "should not be able to create GEOMETRY shader");
+
+  checkDeferredCompliation()
+}
+
+function checkDeferredCompliation() {
+  var vs = gl.createShader(gl.VERTEX_SHADER);
+  gl.shaderSource(vs, document.getElementById("vs").text);
+  gl.compileShader(vs);
+  var fs = gl.createShader(gl.FRAGMENT_SHADER);
+  // Compile the green shader
+  gl.shaderSource(fs, document.getElementById("fs-green").text);
+  gl.compileShader(fs);
+  // Load the red shader source but do NOT compile it
+  gl.shaderSource(fs, document.getElementById("fs-red").text);
+  var p = gl.createProgram();
+  gl.attachShader(p, vs);
+  gl.attachShader(p, fs);
+  gl.bindAttribLocation(p, 0, "vPosition");
+  gl.linkProgram(p);
+  gl.useProgram(p);
+  wtu.setupUnitQuad(gl, 0, 1);
+  wtu.clearAndDrawUnitQuad(gl);
+  wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
+}
+
+debug("");
+var successfullyParsed = true;
+
+</script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>