t.Skip("https://go.dev/issue/20253")
	}

	const maxMemory = 1024
	const key = "file"

	if runtime.GOOS == "windows" {
		// Windows sometimes refuses to remove a file that was just closed.
		t.Skip("https://go.dev/issue/25965")
	}

	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		r.ParseMultipartForm(maxMemory)
		f, _, err := r.FormFile(key)
		if err != nil {