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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/textures/misc/texture-transparent-pixels-initialized.html b/dom/canvas/test/webgl-conf/checkout/conformance/textures/misc/texture-transparent-pixels-initialized.html
new file mode 100644
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance/textures/misc/texture-transparent-pixels-initialized.html
@@ -0,0 +1,87 @@
+<!--
+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">
+<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>
+<script>
+"use strict";
+var wtu = WebGLTestUtils;
+var gl = null;
+var texture;
+var textureLoc = null;
+var successfullyParsed = false;
+
+function init()
+{
+    description('Tests there is no garbage in transparent regions of images uploaded as textures');
+
+    wtu = WebGLTestUtils;
+    gl = wtu.create3DContext("example");
+    var program = wtu.setupTexturedQuad(gl);
+    gl.clearColor(0.5,0.5,0.5,1);
+    gl.clearDepth(1);
+
+    textureLoc = gl.getUniformLocation(program, "tex");
+
+    // The input texture has 8 characters; take the leftmost one
+    var coeff = 1.0 / 8.0;
+    var texCoords = new Float32Array([
+        coeff, 1.0,
+        0.0, 1.0,
+        0.0, 0.0,
+        coeff, 1.0,
+        0.0, 0.0,
+        coeff, 0.0]);
+
+    var vbo = gl.createBuffer();
+    gl.bindBuffer(gl.ARRAY_BUFFER, vbo);
+    gl.bufferData(gl.ARRAY_BUFFER, texCoords, gl.STATIC_DRAW);
+    gl.enableVertexAttribArray(1);
+    gl.vertexAttribPointer(1, 2, gl.FLOAT, false, 0, 0);
+
+    texture = wtu.loadTexture(gl, "../../../resources/bug-32888-texture.png", runTest);
+}
+
+// These two declarations need to be global for "shouldBe" to see them
+var buf = null;
+var idx = 0;
+
+function runTest()
+{
+    gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
+    gl.enable(gl.BLEND);
+    gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
+    // Bind the texture to texture unit 0
+    gl.bindTexture(gl.TEXTURE_2D, texture);
+    // Point the uniform sampler to texture unit 0
+    gl.uniform1i(textureLoc, 0);
+    // Draw the triangles
+    wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
+
+    // Spot check a couple of 2x2 regions in the upper and lower left
+    // corners; they should be the rgb values in the texture.
+    var color = [0, 0, 0];
+    debug("Checking lower left corner");
+    wtu.checkCanvasRect(gl, 1, gl.canvas.height - 3, 2, 2, color,
+                        "shouldBe " + color);
+    debug("Checking upper left corner");
+    wtu.checkCanvasRect(gl, 1, 1, 2, 2, color,
+                        "shouldBe " + color);
+
+    finishTest();
+}
+</script>
+</head>
+<body onload="init()">
+<canvas id="example" width="32" height="32"></canvas>
+<div id="description"></div>
+<div id="console"></div>
+</body>
+</html>