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diff --git a/test/suite/intl402/ch10/10.2/10.2.3_b.js b/test/suite/intl402/ch10/10.2/10.2.3_b.js
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+// Copyright 2012 Mozilla Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/**
+ * @description Tests that Intl.Collator does not accept Unicode locale
+ *     extension keys and values that are not allowed.
+ * @author Norbert Lindenberg
+ */
+
+$INCLUDE("testIntl.js");
+
+var defaultCollator = new Intl.Collator();
+var defaultOptions = defaultCollator.resolvedOptions();
+var defaultOptionsJSON = JSON.stringify(defaultOptions);
+var defaultLocale = defaultOptions.locale;
+var defaultSortedArray = ["hello", "你好", "こんにちは", "pêche", "peché", "9", "10"].sort(defaultCollator.compare);
+
+
+var keyValues = {
+    "co": ["standard", "search", "invalid"],
+    "ka": ["noignore", "shifted", "invalid"],
+    "kb": ["true", "false", "invalid"],
+    "kc": ["true", "false", "invalid"],
+    "kh": ["true", "false", "invalid"],
+    "kr": ["latn-hira-hani", "hani-hira-latn", "invalid"],
+    "ks": ["level1", "level2", "level3", "level4", "identic", "invalid"],
+    "vt": ["1234-5678-9abc-edf0", "invalid"]
+};
+
+var testArray = defaultSortedArray.slice(0);
+
+Object.getOwnPropertyNames(keyValues).forEach(function (key) {
+    keyValues[key].forEach(function (value) {
+        var collator = new Intl.Collator([defaultLocale + "-u-" + key + "-" + value]);
+        var options = collator.resolvedOptions();
+        if (options.locale !== defaultLocale) {
+            $ERROR("Locale " + options.locale + " is affected by key " +
+                key + "; value " + value + ".");
+        }
+        if (JSON.stringify(options) !== defaultOptionsJSON) {
+            $ERROR("Resolved options " + JSON.stringify(options) + " are affected by key " +
+                key + "; value " + value + ".");
+        }
+        testArraysAreSame(defaultSortedArray, testArray.sort(collator.compare));
+    });
+});
+