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diff --git a/test/built-ins/SharedArrayBuffer/length.js b/test/built-ins/SharedArrayBuffer/length.js
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+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-sharedarraybuffer-constructor
+description: >
+  SharedArrayBuffer.length is 1.
+info: |
+  SharedArrayBuffer( length )
+
+  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]
+features: [SharedArrayBuffer]
+---*/
+
+verifyProperty(SharedArrayBuffer, "length", {
+  value: 1,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});