if err := filter.GetTypedConfig().UnmarshalTo(tcpConfig); err != nil {
								t.Fatal(err)
							}
							if tcpConfig.GetCluster() == util.BlackHoleCluster {
								// Ignore the tcp_proxy filter with black hole cluster that just doesn't have access log.
								continue
							}
							if len(tcpConfig.AccessLog) < 1 {
								t.Fatalf("tcp_proxy want at least 1 access log, got 0")
							}