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diff --git a/js/src/tests/test262/intl402/DisplayNames/ctor-custom-prototype.js b/js/src/tests/test262/intl402/DisplayNames/ctor-custom-prototype.js
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+++ b/js/src/tests/test262/intl402/DisplayNames/ctor-custom-prototype.js
@@ -0,0 +1,42 @@
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DisplayNames
+description: >
+  Custom Prototype of the returned object based on the NewTarget
+info: |
+  Intl.DisplayNames ( locales , options )
+
+  1. If NewTarget is undefined, throw a TypeError exception.
+  2. Let displayNames be ? OrdinaryCreateFromConstructor(NewTarget, "%DisplayNamesPrototype%",
+    « [[InitializedDisplayNames]], [[Locale]], [[Style]], [[Type]], [[Fallback]], [[Fields]] »).
+  ...
+  12. Let type be ? GetOption(options, "type", "string", « "language", "region", "script", "currency" », undefined).
+  13. If type is undefined, throw a TypeError exception.
+  ...
+
+  OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
+
+  ...
+  2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
+  ...
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  3. Let proto be ? Get(constructor, "prototype").
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [Intl.DisplayNames, Reflect]
+---*/
+
+var custom = new Function();
+custom.prototype = {};
+
+const obj = Reflect.construct(Intl.DisplayNames, [undefined, {type: 'language'}], custom);
+
+assert.sameValue(Object.getPrototypeOf(obj), custom.prototype);
+
+reportCompare(0, 0);