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diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/ternary-operator-on-arrays.html b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/ternary-operator-on-arrays.html
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+++ b/dom/canvas/test/webgl-conf/checkout/conformance/glsl/misc/ternary-operator-on-arrays.html
@@ -0,0 +1,64 @@
+<!--
+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 - Ternary operator on arrays</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="fshader-array-ternary-operator" type="x-shader/x-fragment">
+precision mediump float;
+void main()
+{
+  float a[3];
+  float b[3];
+  float c[3] = true ? a : b;
+}
+</script>
+<script id="fshader-struct-array-ternary-operator" type="x-shader/x-fragment">
+precision mediump float;
+struct MyStruct {
+    bool a[3];
+};
+
+void main()
+{
+  MyStruct b;
+  MyStruct c;
+  MyStruct d = true ? b : c;
+}
+</script>
+<script>
+"use strict";
+description("Checks ternary operators for structs and arrays.");
+
+GLSLConformanceTester.runTests([
+{ fShaderId: 'fshader-array-ternary-operator',
+  fShaderSuccess: false,
+  linkSuccess: false,
+  passMsg: "Using ternary operators with arrays is not allowed",
+},
+{ fShaderId: 'fshader-struct-array-ternary-operator',
+  fShaderSuccess: false,
+  linkSuccess: false,
+  passMsg: "By implication, using ternary operators with structs containing arrays is not allowed",
+},
+]);
+
+debug("");
+var successfullyParsed = true;
+</script>
+</body>
+</html>