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diff --git a/testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/toDataURL.jpeg.alpha.html b/testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/toDataURL.jpeg.alpha.html
new file mode 100644
index 000000000..80a2fca42
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+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/toDataURL.jpeg.alpha.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
+<title>Canvas test: toDataURL.jpeg.alpha</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/canvas-tests.js"></script>
+<link rel="stylesheet" href="/common/canvas-tests.css">
+<body class="show_output">
+
+<h1>toDataURL.jpeg.alpha</h1>
+<p class="desc">toDataURL with JPEG composites onto black</p>
+
+
+<p class="output">Actual output:</p>
+<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
+<p class="output expectedtext">Expected output:<p><img src="toDataURL.jpeg.alpha.png" class="output expected" id="expected" alt="">
+<ul id="d"></ul>
+<script>
+var t = async_test("toDataURL with JPEG composites onto black");
+_addTest(function(canvas, ctx) {
+
+ctx.fillStyle = 'rgba(128, 255, 128, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-over'; // should be ignored by toDataURL
+var data = canvas.toDataURL('image/jpeg');
+ctx.globalCompositeOperation = 'source-over';
+if (!data.match(/^data:image\/jpeg[;,]/)) {
+  _assert(true, "true");
+} else {
+  ctx.fillStyle = '#f00';
+  ctx.fillRect(0, 0, 100, 50);
+  var img = new Image();
+  deferTest();
+  img.onload = t.step_func_done(function ()
+  {
+      ctx.drawImage(img, 0, 0);
+      _assertPixelApprox(canvas, 50,25, 63,127,63,255, "50,25", "63,127,63,255", 8);
+  });
+  img.src = data;
+}
+
+
+});
+</script>
+