iopCRFile = filepath.Join(workDir, "iop_cr.yaml")
				r := "v2"
				// later just run `kubectl apply -f newcr.yaml` to apply new installation cr files and verify.
				applyIop(t, t, cs, "minimal", r)

				if err := checkInstallStatus(cs, r); err != nil {
					t.Errorf("failed to check install status: %v", err)
				}

				iopName := revName("test-istiocontrolplane", r)

				log.Infof("delete iop %s", iopName)

		err = multierror.Append(err, e)
	}
	if err != nil {
		scopes.Framework.Errorf("failed to cleanup dynamically created resources: %v", err)
	}
}

// checkInstallStatus check the status of IstioOperator CR from the cluster
func checkInstallStatus(cs istioKube.CLIClient, revision string) error {
	scopes.Framework.Infof("checking IstioOperator CR status")
	gvr := iopv1alpha1.IstioOperatorGVR

	var unhealthyCN []string