And the renewal conf file for the test case...

letsencrypt/tests/testdata/sample-renewal-ancient.conf

@@ -0,0 +1,75 @@
+cert = MAGICDIR/live/sample-renewal/cert.pem
+privkey = MAGICDIR/live/sample-renewal/privkey.pem
+chain = MAGICDIR/live/sample-renewal/chain.pem
+fullchain = MAGICDIR/live/sample-renewal/fullchain.pem
+renew_before_expiry = 1 year
+
+# Options and defaults used in the renewal process
+[renewalparams]
+no_self_upgrade = False
+apache_enmod = a2enmod
+no_verify_ssl = False
+ifaces = None
+apache_dismod = a2dismod
+register_unsafely_without_email = False
+apache_handle_modules = True
+uir = None
+installer = none
+nginx_ctl = nginx
+config_dir = MAGICDIR
+text_mode = False
+func = <function obtain_cert at 0x7f093a163c08>
+staging = True
+prepare = False
+work_dir = /var/lib/letsencrypt
+tos = False
+init = False
+http01_port = 80
+duplicate = False
+noninteractive_mode = True
+key_path = None
+nginx = False
+nginx_server_root = /etc/nginx
+fullchain_path = /home/ubuntu/letsencrypt/chain.pem
+email = None
+csr = None
+agree_dev_preview = None
+redirect = None
+verb = certonly
+verbose_count = -3
+config_file = None
+renew_by_default = False
+hsts = False
+apache_handle_sites = True
+authenticator = webroot
+domains = isnot.org,
+rsa_key_size = 2048
+apache_challenge_location = /etc/apache2
+checkpoints = 1
+manual_test_mode = False
+apache = False
+cert_path = /home/ubuntu/letsencrypt/cert.pem
+webroot_path = /var/www/
+reinstall = False
+expand = False
+strict_permissions = False
+apache_server_root = /etc/apache2
+account = None
+dry_run = False
+manual_public_ip_logging_ok = False
+chain_path = /home/ubuntu/letsencrypt/chain.pem
+break_my_certs = False
+standalone = True
+manual = False
+server = https://acme-staging.api.letsencrypt.org/directory
+standalone_supported_challenges = "tls-sni-01,http-01"
+webroot = True
+os_packages_only = False
+apache_init_script = None
+user_agent = None
+apache_le_vhost_ext = -le-ssl.conf
+debug = False
+tls_sni_01_port = 443
+logs_dir = /var/log/letsencrypt
+apache_vhost_root = /etc/apache2/sites-available
+configurator = None