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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/rendering/gl-drawelements.html b/dom/canvas/test/webgl-conf/checkout/conformance/rendering/gl-drawelements.html
new file mode 100644
index 0000000000..347d539dbc
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance/rendering/gl-drawelements.html
@@ -0,0 +1,97 @@
+<!--
+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 drawElements 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";
+description(document.title);
+
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext("example");
+var program = wtu.setupProgram(gl, ["vshader", "fshader"], ["vPosition"]);
+
+gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer());
+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);
+gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
+
+gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.createBuffer());
+gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array([ 0, 1, 2]), gl.STATIC_DRAW);
+wtu.shouldGenerateGLError(gl, gl.NO_ERROR,
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 0)");
+
+gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint8Array([ 0, 1, 2, 0]), gl.STATIC_DRAW);
+wtu.shouldGenerateGLError(gl, gl.NO_ERROR,
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_BYTE, 0)");
+
+wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM,
+                          "gl.drawElements(desktopGL.QUAD_STRIP, 4, gl.UNSIGNED_BYTE, 0)");
+wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM,
+                          "gl.drawElements(desktopGL.QUADS, 4, gl.UNSIGNED_BYTE, 0)");
+wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM,
+                          "gl.drawElements(desktopGL.POLYGON, 4, gl.UNSIGNED_BYTE, 0)");
+
+gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint32Array([ 0, 1, 2]), gl.STATIC_DRAW);
+
+wtu.shouldGenerateGLError(gl,
+                          wtu.getDefault3DContextVersion() > 1 ? gl.NO_ERROR : gl.INVALID_ENUM,
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_INT, 0)");
+
+wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM,
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.FLOAT, 0)");
+wtu.shouldGenerateGLError(gl, gl.INVALID_ENUM,
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.SHORT, 0)");
+
+// Index validation
+gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array([0,1,2,2000, 40802, 5887992]), gl.STATIC_DRAW);
+wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION,
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 1)");
+wtu.shouldGenerateGLError(gl, gl.NO_ERROR,
+                          "gl.drawElements(gl.TRIANGLES, 2, gl.UNSIGNED_SHORT, 2)");
+var indexValidationError = wtu.shouldGenerateGLError(gl, [gl.INVALID_OPERATION, gl.NO_ERROR],
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 2)");
+wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION,
+                          "gl.drawElements(gl.TRIANGLES, 3, gl.UNSIGNED_SHORT, 3)");
+wtu.shouldGenerateGLError(gl, indexValidationError,
+                          "gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0)");
+wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION,
+                          "gl.drawElements(gl.TRIANGLES, 7, gl.UNSIGNED_SHORT, 0)");
+wtu.shouldGenerateGLError(gl, gl.INVALID_OPERATION,
+                          "gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 2)");
+
+var successfullyParsed = true;
+</script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>