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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/rendering/gl-drawarrays.html b/dom/canvas/test/webgl-conf/checkout/conformance/rendering/gl-drawarrays.html
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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 drawArrays Test</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>
+<canvas id="example" width="50" height="50"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+<script id="vshader" type="x-shader/x-vertex">
+attribute vec4 vPosition;
+void main()
+{
+    gl_Position = vPosition;
+}
+</script>
+
+<script id="fshader" type="x-shader/x-fragment">
+void main()
+{
+    gl_FragColor = vec4(1.0,0.0,0.0,1.0);
+}
+</script>
+
+<script>
+"use strict";
+function init()
+{
+    description(document.title);
+
+    function checkDrawArrays(mode, count, expect, msg) {
+        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+        gl.drawArrays(mode, 0, count);
+        wtu.glErrorShouldBe(gl, expect, msg);
+    }
+
+    var wtu = WebGLTestUtils;
+    var gl = wtu.create3DContext("example");
+    var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);
+
+    var vertexObject = gl.createBuffer();
+    gl.bindBuffer(gl.ARRAY_BUFFER, vertexObject);
+    gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);
+    gl.enableVertexAttribArray(0);
+
+    checkDrawArrays(gl.TRIANGLES, 3,
+                    gl.INVALID_OPERATION, "gl.DrawArrays with no buffer attached to VAO should return INVALID_OPERATION");
+
+    gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
+
+    checkDrawArrays(gl.TRIANGLES, 3,
+                    gl.NO_ERROR, "can call gl.DrawArrays with gl.TRIANGLES");
+
+    checkDrawArrays(
+        desktopGL['QUAD_STRIP'], 4,
+        gl.INVALID_ENUM, "gl.DrawArrays with QUAD_STRIP should return INVALID_ENUM");
+    checkDrawArrays(
+        desktopGL['QUADS'], 4,
+        gl.INVALID_ENUM, "gl.DrawArrays with QUADS should return INVALID_ENUM");
+    checkDrawArrays(
+        desktopGL['POLYGON'], 4,
+        gl.INVALID_ENUM, "gl.DrawArrays with POLYGON should return INVALID_ENUM");
+}
+
+init();
+var successfullyParsed = true;
+</script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>