defer cancel()
	_, err := r.LookupIPAddr(ctx, "where.are.they.now")
	if err == nil {
		t.Fatal("fake DNS lookup unexpectedly succeeded")
	}
}

func lookupWithFake(fake fakeDNSServer, name string, typ dnsmessage.Type) error {
	r := Resolver{PreferGo: true, Dial: fake.DialContext}

	conf := getSystemDNSConfig()

	ctx, cancel := context.WithCancel(context.Background())