Running sonobuoy on openshift

[igalvarez]

Hi :-)
I'm able to run sonobuoy on K8s without an issue, but now I'm trying to run sonobuoy on a OCP4 cluster, but I get this error

[igarcia@bastion-lab4 sonobuoy]$ sonobuoy run --wait --mode conformance-lite
ERRO[0000] Preflight checks failed
ERRO[0000] no dns pods found with the labels [k8s-app=kube-dns, k8s-app=coredns] in namespace kube-system

Thxxxxx

[igalvarez]

sorry.. I did not see --skip-preflight flag... but, how can I define dns namespace on labels k8s-app in order to run this amazing tool on OCP cluster?