certsphase.CheckCertificatePeriodValidity(kubeadmconstants.CACertAndKeyBaseName, caCert)

	// validate user provided kubeconfig files for the scheduler and controller-manager
	localAPIEndpoint, err := kubeadmutil.GetLocalAPIEndpoint(&cfg.LocalAPIEndpoint)
	if err != nil {
		return err
	}

	validationConfigLocal := kubeconfigutil.CreateBasic(localAPIEndpoint, "dummy", "dummy", pkiutil.EncodeCertPEM(caCert))

				controlPlaneEndpoint, err := kubeadmutil.GetControlPlaneEndpoint(cfg.ControlPlaneEndpoint, &cfg.LocalAPIEndpoint)
				if err != nil {
					t.Error(err)
				}
				localAPIEndpoint, err := kubeadmutil.GetLocalAPIEndpoint(&cfg.LocalAPIEndpoint)
				if err != nil {
					t.Error(err)
				}

				switch assertion.kubeConfigFile {