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diff --git a/js/src/tests/test262/intl402/DateTimeFormat/length.js b/js/src/tests/test262/intl402/DateTimeFormat/length.js
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+++ b/js/src/tests/test262/intl402/DateTimeFormat/length.js
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+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.datetimeformat
+description: >
+  Intl.DateTimeFormat.length is 0.
+info: |
+  Intl.DateTimeFormat ( [ locales [ , options ] ] )
+
+  17 ECMAScript Standard Built-in Objects:
+
+    Every built-in function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description. Optional parameters
+    (which are indicated with brackets: [ ]) or rest parameters (which
+    are shown using the form «...name») are not included in the default
+    argument count.
+    Unless otherwise specified, the length property of a built-in function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(Intl.DateTimeFormat.length, 0);
+
+verifyNotEnumerable(Intl.DateTimeFormat, "length");
+verifyNotWritable(Intl.DateTimeFormat, "length");
+verifyConfigurable(Intl.DateTimeFormat, "length");
+
+reportCompare(0, 0);