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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/boolean_precision.html b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/boolean_precision.html
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index 0000000000..da0c55a164
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@@ -0,0 +1,72 @@
+<!--
+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>
+<script src="../../../js/glsl-conformance-test.js"></script>
+</head>
+<body>
+<div id="description"></div>
+<div id="console"></div>
+<script id="vertexTest" type="text/something-not-javascript">
+// parsing boolean variables with precision should fail
+void main() {
+  mediump $(type) fail = $(initializer);
+  gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
+}
+</script>
+<script id="fragmentTest" type="text/something-not-javascript">
+// parsing boolean variables with precision should fail
+void main() {
+  mediump $(type) fail = $(initializer);
+  gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
+}
+</script>
+<script>
+"use strict";
+var wtu = WebGLTestUtils;
+
+var types = ['bool', 'bvec2', 'bvec3', 'bvec4'];
+var tests = [];
+var vTestSource = wtu.getScript("vertexTest");
+var fTestSource = wtu.getScript("fragmentTest");
+
+for (var i = 0; i < types.length; ++i) {
+    var initializer = 'true';
+    if (types[i] !== 'bool') {
+        initializer = types[i] + "(true";
+        for (var j = 0; j < i; ++j) {
+            initializer += ", true";
+        }
+        initializer += ")";
+    }
+    var subs = {type: types[i], initializer: initializer};
+    tests.push({
+        vShaderSource: wtu.replaceParams(vTestSource, subs),
+        vShaderSuccess: false,
+        passMsg: "vertex shader with a " + types[i] + " variable with precision should fail."
+    });
+    tests.push({
+        fShaderSource: wtu.replaceParams(fTestSource, subs),
+        fShaderSuccess: false,
+        passMsg: "fragment shader with a " + types[i] + " variable with precision should fail."
+    });
+}
+GLSLConformanceTester.runTests(tests);
+
+var successfullyParsed = true;
+</script>
+</body>
+</html>
+
+