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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/more/functions/isTests.html b/dom/canvas/test/webgl-conf/checkout/conformance/more/functions/isTests.html
new file mode 100644
index 0000000000..54c1cb0603
--- /dev/null
+++ b/dom/canvas/test/webgl-conf/checkout/conformance/more/functions/isTests.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<!--
+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.
+-->
+<link rel="stylesheet" type="text/css" href="../unit.css" />
+<script type="application/javascript" src="../unit.js"></script>
+<script type="application/javascript" src="../util.js"></script>
+<script type="application/javascript">
+
+Tests.startUnit = function () {
+  var canvas = document.getElementById('gl');
+  var gl = wrapGLContext(getGLContext(canvas));
+  return [gl];
+}
+
+Tests.testIs = function(gl) {
+    var tex = loadTexture(gl, document.getElementById('2d'));
+    gl.bindTexture(gl.TEXTURE_2D, tex);
+    var fbo = new FBO(gl, 1, 1);
+    fbo.use();
+    var prog = gl.createProgram();
+    var sh1 = gl.createShader(gl.VERTEX_SHADER);
+    var sh2 = gl.createShader(gl.FRAGMENT_SHADER);
+    var buf = gl.createBuffer();
+    gl.bindBuffer(gl.ARRAY_BUFFER, buf);
+    assert("tex", gl.isTexture(tex));
+    assert("fbo", gl.isFramebuffer(fbo.fbo));
+    assert("rbo", gl.isRenderbuffer(fbo.rbo));
+    assert("prog", gl.isProgram(prog));
+    assert("sh1", gl.isShader(sh1));
+    assert("sh2", gl.isShader(sh2));
+    assert("buf", gl.isBuffer(buf));
+    gl.deleteTexture(tex);
+    gl.deleteFramebuffer(fbo.fbo);
+    gl.deleteRenderbuffer(fbo.rbo);
+    gl.deleteProgram(prog);
+    gl.deleteShader(sh1);
+    gl.deleteShader(sh2);
+    gl.deleteBuffer(buf);
+    // NOTE: we purposely do not unbind things.
+    assert("tex", !gl.isTexture(tex));
+    assert("fbo", !gl.isFramebuffer(fbo.fbo));
+    assert("rbo", !gl.isRenderbuffer(fbo.rbo));
+    assert("prog", !gl.isProgram(prog));
+    assert("sh1", !gl.isShader(sh1));
+    assert("sh2", !gl.isShader(sh2));
+    assert("buf", !gl.isBuffer(buf));
+}
+
+</script>
+
+<style>canvas{ position:absolute; }</style>
+</head><body>
+  <canvas id="gl" width="1" height="1"></canvas>
+  <canvas id="2d" width="16" height="16"></canvas>
+</body></html>