if err != nil {
			t.Fatal(err)
		}
		c, _, err := w.(Hijacker).Hijack()
		if err != nil {
			t.Fatal(err)
		}
		defer c.Close()
		fmt.Fprintln(c, "some bogus crap")
	}))

	closes := 0
	res, err := cst.c.Post(cst.ts.URL, "text/plain", countCloseReader{&closes, strings.NewReader("hello")})
	if err == nil {
		res.Body.Close()