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diff --git a/testing/web-platform/tests/2dcontext/fill-and-stroke-styles/2d.gradient.interpolate.alpha.html b/testing/web-platform/tests/2dcontext/fill-and-stroke-styles/2d.gradient.interpolate.alpha.html
new file mode 100644
index 000000000..7bf486da4
--- /dev/null
+++ b/testing/web-platform/tests/2dcontext/fill-and-stroke-styles/2d.gradient.interpolate.alpha.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
+<title>Canvas test: 2d.gradient.interpolate.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>2d.gradient.interpolate.alpha</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.gradient.interpolate.alpha.png" class="output expected" id="expected" alt="">
+<ul id="d"></ul>
+<script>
+var t = async_test("");
+_addTest(function(canvas, ctx) {
+
+ctx.fillStyle = '#ff0';
+ctx.fillRect(0, 0, 100, 50);
+var g = ctx.createLinearGradient(0, 0, 100, 0);
+g.addColorStop(0, 'rgba(0,0,255, 0)');
+g.addColorStop(1, 'rgba(0,0,255, 1)');
+ctx.fillStyle = g;
+ctx.fillRect(0, 0, 100, 50);
+_assertPixelApprox(canvas, 25,25, 191,191,63,255, "25,25", "191,191,63,255", 3);
+_assertPixelApprox(canvas, 50,25, 127,127,127,255, "50,25", "127,127,127,255", 3);
+_assertPixelApprox(canvas, 75,25, 63,63,191,255, "75,25", "63,63,191,255", 3);
+
+
+});
+</script>
+