'Get a new ``CRL`` with a revocation.'

def _get_crl(self):

    crl = CRL()
    revoked = Revoked()
    now = b(datetime.now().strftime('%Y%m%d%H%M%SZ'))
    revoked.set_rev_date(now)
    revoked.set_serial(b('3ab'))
    revoked.set_reason(b('sUpErSeDEd'))
    crl.add_revoked(revoked)
    return crl
