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diff --git a/testing/web-platform/tests/2dcontext/compositing/2d.composite.image.source-atop.html b/testing/web-platform/tests/2dcontext/compositing/2d.composite.image.source-atop.html
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+++ b/testing/web-platform/tests/2dcontext/compositing/2d.composite.image.source-atop.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
+<title>Canvas test: 2d.composite.image.source-atop</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>2d.composite.image.source-atop</h1>
+<p class="desc"></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="2d.composite.image.source-atop.png" class="output expected" id="expected" alt="">
+<ul id="d"></ul>
+<script>
+var t = async_test("");
+_addTest(function(canvas, ctx) {
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'source-atop';
+ctx.drawImage(document.getElementById('yellow75.png'), 0, 0);
+_assertPixelApprox(canvas, 50,25, 191,255,64,128, "50,25", "191,255,64,128", 5);
+
+
+});
+</script>
+<img src="/images/yellow75.png" id="yellow75.png" class="resource">
+