1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/DurationFormat/extensibility.js b/js/src/tests/test262/intl402/DurationFormat/extensibility.js
new file mode 100644
index 0000000000..f0d7dcc554
--- /dev/null
+++ b/js/src/tests/test262/intl402/DurationFormat/extensibility.js
@@ -0,0 +1,25 @@
+// |reftest| skip -- Intl.DurationFormat is not supported
+// Copyright 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DurationFormat
+description: Intl.DurationFormat instance object extensibility
+info: |
+    17 ECMAScript Standard Built-in Objects:
+
+    Unless specified otherwise, the [[Extensible]] internal slot
+    of a built-in object initially has the value true.
+
+features: [Intl.DurationFormat]
+---*/
+
+assert.sameValue(
+  Object.isExtensible(new Intl.DurationFormat()),
+  true,
+  "Object.isExtensible(new Intl.DurationFormat()) returns true"
+);
+
+
+
+reportCompare(0, 0);