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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance2/offscreencanvas/methods-2-worker.html b/dom/canvas/test/webgl-conf/checkout/conformance2/offscreencanvas/methods-2-worker.html
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance2/offscreencanvas/methods-2-worker.html
@@ -0,0 +1,39 @@
+<!--
+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 Methods Test for OffscreenCanvas in a worker</title>
+<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>
+description("This test ensures that the WebGL context created for an OffscreenCanvas has all the methods in the specification.");
+
+if (!window.OffscreenCanvas) {
+  testPassed("No OffscreenCanvas support");
+  finishTest();
+} else {
+  var worker = new Worker('methods-2-worker.js');
+  worker.postMessage("Start worker");
+  worker.onmessage = function(e) {
+    if (e.data == "Test passed") {
+      testPassed("All test have passed");
+    } else {
+      testFailed("Some tests failed");
+    }
+    finishTest();
+  }
+}
+
+</script>
+</body>
+</html>