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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/glsl/literals/overflow_leak.vert.html b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/literals/overflow_leak.vert.html
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@@ -0,0 +1,61 @@
+<!--
+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">
+<title>WebGL GLSL Conformance Tests</title>
+<link rel="stylesheet" href="../../../resources/js-test-style.css"/>
+<link rel="stylesheet" href="../../../resources/glsl-feature-tests.css"/>
+<script src="../../../js/js-test-pre.js"></script>
+<script src="../../../js/webgl-test-utils.js"></script>
+</head>
+<body>
+<div id="description"></div>
+<div id="console"></div>
+<canvas id="example" width="2" height="2"> </canvas>
+<script id="vshader" type="x-shader/x-vertex">
+// float literal overflow should not affect next literal parsing.
+precision mediump float;
+
+varying vec4 v_color;
+attribute vec4 a_position;
+void main() {
+    highp float floatOverflow = 1E100;
+    int i = 10;
+    if (i == 10)
+        v_color = vec4(0.0, 1.0, 0.0, 1.0);
+    else
+        v_color = vec4(1.0, 0.0, 0.0, 1.0);
+    gl_Position = a_position;
+}
+</script>
+<script id="fshader" type="x-shader/x-fragment">
+precision mediump float;
+
+varying vec4 v_color;
+void main() {
+    gl_FragColor = v_color;
+}
+</script>
+<script>
+"use strict";
+description();
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext("example");
+wtu.setupUnitQuad(gl);
+var program = wtu.setupProgram(gl, ["vshader", "fshader"]);
+if (!program)
+    testFailed("Fail to setup program");
+wtu.clearAndDrawUnitQuad(gl);
+wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
+
+var successfullyParsed = true;
+</script>
+<script src="../../../js/js-test-post.js"></script>
+</body>
+</html>