defer proxy.Close()
	c := proxy.Client()

	tr := c.Transport.(*Transport)
	tr.Proxy = func(*Request) (*url.URL, error) {
		u, _ := url.Parse(proxy.URL)
		u.User = url.UserPassword("aladdin", "opensesame")
		return u, nil
	}
	h := tr.ProxyConnectHeader
	if h == nil {
		h = make(Header)
	}
	tr.ProxyConnectHeader = h.Clone()