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diff --git a/js/src/tests/test262/intl402/Intl/supportedValuesOf/collations.js b/js/src/tests/test262/intl402/Intl/supportedValuesOf/collations.js
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+// Copyright (C) 2021 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.supportedvaluesof
+description: >
+  The returned "collation" values are sorted, unique, and match the type production.
+info: |
+  Intl.supportedValuesOf ( key )
+
+  1. Let key be ? ToString(key).
+  ...
+  3. Else if key is "collation", then
+    a. Let list be ! AvailableCollations( ).
+  ...
+  9. Return ! CreateArrayFromList( list ).
+
+  AvailableCollations ( )
+    The AvailableCollations abstract operation returns a List, ordered as if an
+    Array of the same values had been sorted using %Array.prototype.sort% using
+    undefined as comparefn, that contains unique collation types identifying the
+    collations for which the implementation provides the functionality of
+    Intl.Collator objects.
+includes: [compareArray.js]
+features: [Intl-enumeration, Intl.Locale, Array.prototype.includes]
+---*/
+
+const collations = Intl.supportedValuesOf("collation");
+
+assert(Array.isArray(collations), "Returns an Array object.");
+assert.sameValue(Object.getPrototypeOf(collations), Array.prototype,
+                 "The array prototype is Array.prototype");
+
+const otherCollations = Intl.supportedValuesOf("collation");
+assert.notSameValue(otherCollations, collations,
+                    "Returns a new array object for each call.");
+
+assert.compareArray(collations, otherCollations.sort(),
+                    "The array is sorted.");
+
+assert.sameValue(new Set(collations).size, collations.length,
+                 "The array doesn't contain duplicates.");
+
+// https://unicode.org/reports/tr35/tr35.html#Unicode_locale_identifier
+const typeRE = /^[a-z0-9]{3,8}(-[a-z0-9]{3,8})*$/;
+for (let collation of collations) {
+  assert(typeRE.test(collation), `${collation} matches the 'type' production`);
+}
+
+for (let collation of collations) {
+  assert.sameValue(new Intl.Locale("und", {collation}).collation, collation,
+                   `${collation} is canonicalised`);
+}
+
+assert(!collations.includes("standard"), "Mustn't include the 'standard' collation type.");
+assert(!collations.includes("search"), "Mustn't include the 'search' collation type.");
+
+reportCompare(0, 0);