// supposed to be impossible; if we knew of any non-absurd scenario that would
	// cause such a failure, then that would be a bug and we would fix it.
	if _, err := fp.iptables.ChainExists(utiliptables.TableNAT, utiliptables.Chain("KUBE-SEP-AYCN5HPXMIRJNJXU")); err != nil {
		t.Fatalf("svc4's endpoint chain unexpected already does not exist!")
	}