1 files changed, 7 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_bug1033920.js b/js/xpconnect/tests/unit/test_bug1033920.js
new file mode 100644
index 0000000000..dc3834ecb8
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_bug1033920.js
@@ -0,0 +1,7 @@
+const Cu = Components.utils;
+function run_test() {
+  var sb = Cu.Sandbox('http://www.example.com');
+  var o = new sb.Object();
+  o.__proto__ = null;
+  do_check_eq(Object.getPrototypeOf(o), null);
+}