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diff --git a/testing/web-platform/tests/2dcontext/pixel-manipulation/2d.imageData.object.round.html b/testing/web-platform/tests/2dcontext/pixel-manipulation/2d.imageData.object.round.html
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+++ b/testing/web-platform/tests/2dcontext/pixel-manipulation/2d.imageData.object.round.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
+<title>Canvas test: 2d.imageData.object.round</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.imageData.object.round</h1>
+<p class="desc">ImageData.data rounds numbers with round-to-zero</p>
+
+
+<p class="output">Actual output:</p>
+<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
+
+<ul id="d"></ul>
+<script>
+var t = async_test("ImageData.data rounds numbers with round-to-zero");
+_addTest(function(canvas, ctx) {
+
+var imgdata = ctx.getImageData(0, 0, 10, 10);
+imgdata.data[0] = 0.499;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 0.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = 0.501;
+_assertSame(imgdata.data[0], 1, "imgdata.data[\""+(0)+"\"]", "1");
+imgdata.data[0] = 1.499;
+_assertSame(imgdata.data[0], 1, "imgdata.data[\""+(0)+"\"]", "1");
+imgdata.data[0] = 1.5;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 1.501;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 2.5;
+_assertSame(imgdata.data[0], 2, "imgdata.data[\""+(0)+"\"]", "2");
+imgdata.data[0] = 3.5;
+_assertSame(imgdata.data[0], 4, "imgdata.data[\""+(0)+"\"]", "4");
+imgdata.data[0] = 252.5;
+_assertSame(imgdata.data[0], 252, "imgdata.data[\""+(0)+"\"]", "252");
+imgdata.data[0] = 253.5;
+_assertSame(imgdata.data[0], 254, "imgdata.data[\""+(0)+"\"]", "254");
+imgdata.data[0] = 254.5;
+_assertSame(imgdata.data[0], 254, "imgdata.data[\""+(0)+"\"]", "254");
+imgdata.data[0] = 256.5;
+_assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255");
+imgdata.data[0] = -0.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+imgdata.data[0] = -1.5;
+_assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
+
+
+});
+</script>
+