Roots:       getRootCertPool(t),
			},
			Certs: getCerts(t, clientCNCert),
			User:  CommonNameUserConversion,

			ExpectOK:  false,
			ExpectErr: true,
		},
		"expired cert": {
			Opts: x509.VerifyOptions{
				CurrentTime: time.Now().Add(time.Duration(100 * time.Hour * 24 * 365)),
				Roots:       getRootCertPool(t),
			},
			Certs: getCerts(t, clientCNCert),