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<!doctype html>
<html lang="en">
    <head><title>Testcafe-hammerhead passthrough</title></head>
    <body>
        <script type="text/javascript">
    eval("var callfn = function(arg) { arg.contentWindow.alert('Hello world inside!!!'); }; document.body.innerHTML += \"<iframe src='about:blank' onLoad='callfn(this)'></iframe>\"; ");
        alert('Hello world outside');
        </script>
        Test page
    </body>
</html>