1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/tests/non262/JSON/immutable.js b/js/src/tests/non262/JSON/immutable.js
new file mode 100644
index 0000000000..e84dc3612a
--- /dev/null
+++ b/js/src/tests/non262/JSON/immutable.js
@@ -0,0 +1,13 @@
+// |reftest| skip-if(!this.hasOwnProperty("Record"))
+
+assertEq(
+	JSON.parseImmutable('{"x":1,"a":[1,2,{},[]]}'),
+	#{ x: 1, a: #[1, 2, #{}, #[]] }
+);
+
+assertEq(
+	JSON.parseImmutable('{"a":1,"a":2}'),
+	#{ a: 2 }
+);
+
+if (typeof reportCompare === "function") reportCompare(0, 0);