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diff --git a/test/suite/intl402/ch09/9.2/9.2.1_1.js b/test/suite/intl402/ch09/9.2/9.2.1_1.js
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index 000000000..7386fdeda
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+++ b/test/suite/intl402/ch09/9.2/9.2.1_1.js
@@ -0,0 +1,23 @@
+// Copyright 2012 Mozilla Corporation. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * @description Tests that canonicalization of locale lists treats undefined and empty lists the same.
+ * @author Norbert Lindenberg
+ */
+
+$INCLUDE("testIntl.js");
+
+testWithIntlConstructors(function (Constructor) {
+    var supportedForUndefined = Constructor.supportedLocalesOf(undefined);
+    var supportedForEmptyList = Constructor.supportedLocalesOf([]);
+    if (supportedForUndefined.length !== supportedForEmptyList.length) {
+        $ERROR("Supported locales differ between undefined and empty list input.");
+    }
+    // we don't compare the elements because length should be 0 - let's just verify that
+    if (supportedForUndefined.length !== 0) {
+        $ERROR("Internal test error: Assumption about length being 0 is invalid.");
+    }
+    return true;
+});
+