<!DOCTYPE html>
<html>
<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<script>
var t = async_test("Window object should not be reused");
window.onmessage = t.step_func_done(function(e) {
assert_equals(e.data, undefined);
});
w = window.open("support/sandboxed-post-property-to-opener.html?sandbox=allow-scripts","","width=400,height=400");
w.testProperty = "test";
</script>
</body>
</html>