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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/uniforms/null-uniform-location.html b/dom/canvas/test/webgl-conf/checkout/conformance/uniforms/null-uniform-location.html
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index 0000000000..0c49bdb2f0
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance/uniforms/null-uniform-location.html
@@ -0,0 +1,81 @@
+<!--
+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">
+<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>
+<div id="description"></div>
+<div id="console"></div>
+
+<script>
+"use strict";
+description("Tests calling the various uniform[Matrix]* APIs with a null uniform location");
+
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext();
+var program = wtu.loadStandardProgram(gl);
+
+wtu.glErrorShouldBe(gl, gl.NO_ERROR);
+shouldBeUndefined("gl.useProgram(program)");
+var floatArray = new Float32Array([1, 2, 3, 4]);
+var intArray = new Int32Array([1, 2, 3, 4]);
+
+function callUniformFunction(name) {
+  var isArrayVariant = (name.charAt(name.length - 1) == 'v');
+  var isMatrix = (name.indexOf("Matrix") != -1);
+  var isFloat =
+      (name.charAt(name.length - 1) == 'f' ||
+       name.charAt(name.length - 2) == 'f');
+  var sizeIndex = (isArrayVariant ? name.length - 3 : name.length - 2);
+  var size = parseInt(name.substring(sizeIndex, sizeIndex + 1));
+  // Initialize argument list with null uniform location
+  var args = [ null ];
+  if (isArrayVariant) {
+    // Call variant which takes values as array
+    if (isMatrix) {
+      size = size * size;
+      args.push(false);
+    }
+    var array = (isFloat ? new Float32Array(size) : new Int32Array(size));
+    for (var i = 0; i < size; i++) {
+      array[i] = i;
+    }
+    args.push(array);
+  } else {
+    // Call variant which takes values as parameters
+    for (var i = 0; i < size; i++) {
+      args.push(i);
+    }
+  }
+  var func = gl[name];
+  return func.apply(gl, args);
+}
+
+var funcs = [ "uniform1f", "uniform1fv", "uniform1i", "uniform1iv",
+              "uniform2f", "uniform2fv", "uniform2i", "uniform2iv",
+              "uniform3f", "uniform3fv", "uniform3i", "uniform3iv",
+              "uniform4f", "uniform4fv", "uniform4i", "uniform4iv",
+              "uniformMatrix2fv", "uniformMatrix3fv", "uniformMatrix4fv" ];
+var callString;
+
+for (var i = 0; i < funcs.length; i++) {
+  callString = "callUniformFunction('" + funcs[i] + "')";
+  shouldBeUndefined(callString);
+  wtu.glErrorShouldBe(gl, gl.NO_ERROR);
+}
+
+var successfullyParsed = true;
+</script>
+<script src="../../js/js-test-post.js"></script>
+
+</body>
+</html>