diff --git a/acme/acme/client.py b/acme/acme/client.py
index 1838fab42..97f529aae 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -677,9 +677,6 @@ class BackwardsCompatibleClientV2(object):
             return getattr(self.client, name)
         elif name in dir(ClientBase):
             return getattr(self.client, name)
-        # temporary, for breaking changes into smaller pieces
-        elif name in dir(Client):
-            return getattr(self.client, name)
         else:
             raise AttributeError()
 
@@ -723,10 +720,48 @@ class BackwardsCompatibleClientV2(object):
             authorizations = []
             for domain in dnsNames:
                 authorizations.append(self.client.request_domain_challenges(domain))
-            return messages.OrderResource(authorizations=authorizations)
+            return messages.OrderResource(authorizations=authorizations, csr_pem=csr_pem)
         else:
             return self.client.new_order(csr_pem)
 
+    def finalize_order(self, orderr, deadline):
+        """Finalize an order and obtain a certificate.
+
+        :param messages.OrderResource orderr: order to finalize
+        :param datetime.datetime deadline: when to stop polling and timeout
+
+        :returns: finalized order
+        :rtype: messages.OrderResource
+
+        """
+        if self.acme_version == 1:
+            csr_pem = orderr.csr_pem
+            certr = self.client.request_issuance(
+                jose.ComparableX509(
+                    OpenSSL.crypto.load_certificate_request(OpenSSL.crypto.FILETYPE_PEM, csr_pem)),
+                    orderr.authorizations)
+
+            chain = None
+            while datetime.datetime.now() < deadline:
+                try:
+                    chain = self.client.fetch_chain(certr)
+                    break
+                except errors.Error:
+                    time.sleep(1)
+
+            if chain is None:
+                raise errors.TimeoutError(
+                    'Failed to fetch chain. You should not deploy the generated '
+                    'certificate, please rerun the command for a new one.')
+
+            cert = OpenSSL.crypto.dump_certificate(
+                    OpenSSL.crypto.FILETYPE_PEM, certr.body.wrapped)
+            chain = crypto_util.dump_pyopenssl_chain(chain)
+
+            return orderr.update(fullchain_pem=(cert + chain))
+        else:
+            return self.client.finalize_order(orderr, deadline)
+
     def _acme_version_from_directory(self, directory):
         if hasattr(directory, 'newNonce'):
             return 2
diff --git a/acme/acme/client_test.py b/acme/acme/client_test.py
index 1b33ca5d7..acc5193ca 100644
--- a/acme/acme/client_test.py
+++ b/acme/acme/client_test.py
@@ -8,6 +8,7 @@ from six.moves import http_client  # pylint: disable=import-error
 
 import josepy as jose
 import mock
+import OpenSSL
 import requests
 
 from acme import challenges
@@ -82,6 +83,29 @@ class ClientTestBase(unittest.TestCase):
 class BackwardsCompatibleClientV2Test(ClientTestBase):
     """Tests for  acme.client.BackwardsCompatibleClientV2."""
 
+    def setUp(self):
+        super(BackwardsCompatibleClientV2Test, self).setUp()
+        # contains a loaded cert
+        self.certr = messages.CertificateResource(
+            body=messages_test.CERT)
+
+        loaded = OpenSSL.crypto.load_certificate(
+            OpenSSL.crypto.FILETYPE_PEM, CERT_SAN_PEM)
+        wrapped = jose.ComparableX509(loaded)
+        self.chain = [wrapped, wrapped]
+
+        self.cert_pem = OpenSSL.crypto.dump_certificate(
+            OpenSSL.crypto.FILETYPE_PEM, messages_test.CERT.wrapped)
+
+        single_chain = OpenSSL.crypto.dump_certificate(
+            OpenSSL.crypto.FILETYPE_PEM, loaded)
+        self.chain_pem = single_chain + single_chain
+
+        self.fullchain_pem = self.cert_pem + self.chain_pem
+
+        self.orderr = messages.OrderResource(
+            csr_pem=CSR_SAN_PEM)
+
     def _init(self):
         uri = 'http://www.letsencrypt-demo.org/directory'
         from acme.client import BackwardsCompatibleClientV2
@@ -109,8 +133,6 @@ class BackwardsCompatibleClientV2Test(ClientTestBase):
         client = self._init()
         self.assertEqual(client.directory, client.client.directory)
         self.assertEqual(client.key, KEY)
-        # delete this line once we finish migrating to new API:
-        self.assertEqual(client.register, client.client.register)
         self.assertEqual(client.update_registration, client.client.update_registration)
         self.assertRaises(AttributeError, client.__getattr__, 'nonexistent')
         self.assertRaises(AttributeError, client.__getattr__, 'new_account_and_tos')
@@ -182,7 +204,52 @@ class BackwardsCompatibleClientV2Test(ClientTestBase):
             client.new_order(mock_csr_pem)
             mock_client().new_order.assert_called_once_with(mock_csr_pem)
 
+    @mock.patch('acme.client.Client')
+    def test_finalize_order_v1_success(self, mock_client):
+        self.response.json.return_value = DIRECTORY_V1.to_json()
 
+        mock_client().request_issuance.return_value = self.certr
+        mock_client().fetch_chain.return_value = self.chain
+
+        deadline = datetime.datetime(9999, 9, 9)
+        client = self._init()
+        result = client.finalize_order(self.orderr, deadline)
+        self.assertEqual(result.fullchain_pem, self.fullchain_pem)
+        mock_client().fetch_chain.assert_called_once_with(self.certr)
+
+    @mock.patch('acme.client.Client')
+    def test_finalize_order_v1_fetch_chain_error(self, mock_client):
+        self.response.json.return_value = DIRECTORY_V1.to_json()
+
+        mock_client().request_issuance.return_value = self.certr
+        mock_client().fetch_chain.return_value = self.chain
+        mock_client().fetch_chain.side_effect = [errors.Error, self.chain]
+
+        deadline = datetime.datetime(9999, 9, 9)
+        client = self._init()
+        result = client.finalize_order(self.orderr, deadline)
+        self.assertEqual(result.fullchain_pem, self.fullchain_pem)
+        self.assertEqual(mock_client().fetch_chain.call_count, 2)
+
+    @mock.patch('acme.client.Client')
+    def test_finalize_order_v1_timeout(self, mock_client):
+        self.response.json.return_value = DIRECTORY_V1.to_json()
+
+        mock_client().request_issuance.return_value = self.certr
+
+        deadline = deadline = datetime.datetime.now() - datetime.timedelta(seconds=60)
+        client = self._init()
+        self.assertRaises(errors.TimeoutError, client.finalize_order,
+            self.orderr, deadline)
+
+    def test_finalize_order_v2(self):
+        self.response.json.return_value = DIRECTORY_V2.to_json()
+        mock_orderr = mock.MagicMock()
+        mock_deadline = mock.MagicMock()
+        with mock.patch('acme.client.ClientV2') as mock_client:
+            client = self._init()
+            client.finalize_order(mock_orderr, mock_deadline)
+            mock_client().finalize_order.assert_called_once_with(mock_orderr, mock_deadline)
 
 
 class ClientTest(ClientTestBase):
diff --git a/acme/acme/crypto_util.py b/acme/acme/crypto_util.py
index a986721f0..f13c5109c 100644
--- a/acme/acme/crypto_util.py
+++ b/acme/acme/crypto_util.py
@@ -8,6 +8,8 @@ import socket
 import sys
 
 import OpenSSL
+import josepy as jose
+
 
 from acme import errors
 
@@ -280,3 +282,23 @@ def gen_ss_cert(key, domains, not_before=None,
     cert.set_pubkey(key)
     cert.sign(key, "sha256")
     return cert
+
+def dump_pyopenssl_chain(chain, filetype=OpenSSL.crypto.FILETYPE_PEM):
+    """Dump certificate chain into a bundle.
+
+    :param list chain: List of `OpenSSL.crypto.X509` (or wrapped in
+        :class:`josepy.util.ComparableX509`).
+
+    """
+    # XXX: returns empty string when no chain is available, which
+    # shuts up RenewableCert, but might not be the best solution...
+
+    def _dump_cert(cert):
+        if isinstance(cert, jose.ComparableX509):
+            # pylint: disable=protected-access
+            cert = cert.wrapped
+        return OpenSSL.crypto.dump_certificate(filetype, cert)
+
+    # assumes that OpenSSL.crypto.dump_certificate includes ending
+    # newline character
+    return b"".join(_dump_cert(cert) for cert in chain)
diff --git a/acme/acme/crypto_util_test.py b/acme/acme/crypto_util_test.py
index 14aaac8b5..e8dd3b20c 100644
--- a/acme/acme/crypto_util_test.py
+++ b/acme/acme/crypto_util_test.py
@@ -225,5 +225,33 @@ class MakeCSRTest(unittest.TestCase):
             self.assertEqual(len(must_staple_exts), 1,
                 "Expected exactly one Must Staple extension")
 
+
+class DumpPyopensslChainTest(unittest.TestCase):
+    """Test for dump_pyopenssl_chain."""
+
+    @classmethod
+    def _call(cls, loaded):
+        # pylint: disable=protected-access
+        from acme.crypto_util import dump_pyopenssl_chain
+        return dump_pyopenssl_chain(loaded)
+
+    def test_dump_pyopenssl_chain(self):
+        names = ['cert.pem', 'cert-san.pem', 'cert-idnsans.pem']
+        loaded = [test_util.load_cert(name) for name in names]
+        length = sum(
+            len(OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, cert))
+            for cert in loaded)
+        self.assertEqual(len(self._call(loaded)), length)
+
+    def test_dump_pyopenssl_chain_wrapped(self):
+        names = ['cert.pem', 'cert-san.pem', 'cert-idnsans.pem']
+        loaded = [test_util.load_cert(name) for name in names]
+        wrap_func = jose.ComparableX509
+        wrapped = [wrap_func(cert) for cert in loaded]
+        dump_func = OpenSSL.crypto.dump_certificate
+        length = sum(len(dump_func(OpenSSL.crypto.FILETYPE_PEM, cert)) for cert in loaded)
+        self.assertEqual(len(self._call(wrapped)), length)
+
+
 if __name__ == '__main__':
     unittest.main()  # pragma: no cover
diff --git a/certbot/client.py b/certbot/client.py
index dd11f2204..fc3848a5c 100644
--- a/certbot/client.py
+++ b/certbot/client.py
@@ -1,4 +1,5 @@
 """Certbot client API."""
+import datetime
 import logging
 import os
 import platform
@@ -11,7 +12,6 @@ import zope.component
 
 from acme import client as acme_client
 from acme import crypto_util as acme_crypto_util
-from acme import errors as acme_errors
 from acme import messages
 
 import certbot
@@ -243,8 +243,7 @@ class Client(object):
             than `authkey`.
         :param acme.messages.OrderResource orderr: contains authzrs
 
-        :returns: `.CertificateResource` and certificate chain (as
-            returned by `.fetch_chain`).
+        :returns: certificate and chain as PEM strings
         :rtype: tuple
 
         """
@@ -264,32 +263,9 @@ class Client(object):
             orderr = orderr.update(authorizations=authzr)
         authzr = orderr.authorizations
 
-        certr = self.acme.request_issuance(
-            jose.ComparableX509(
-                OpenSSL.crypto.load_certificate_request(OpenSSL.crypto.FILETYPE_PEM, csr.data)),
-                authzr)
-
-        notify = zope.component.getUtility(interfaces.IDisplay).notification
-        retries = 0
-        chain = None
-
-        while retries <= 1:
-            if retries:
-                notify('Failed to fetch chain, please check your network '
-                       'and continue', pause=True)
-            try:
-                chain = self.acme.fetch_chain(certr)
-                break
-            except acme_errors.Error:
-                logger.debug('Failed to fetch chain', exc_info=True)
-                retries += 1
-
-        if chain is None:
-            raise acme_errors.Error(
-                'Failed to fetch chain. You should not deploy the generated '
-                'certificate, please rerun the command for a new one.')
-
-        return certr, chain
+        deadline = datetime.datetime.now() + datetime.timedelta(seconds=90)
+        orderr = self.acme.finalize_order(orderr, deadline)
+        return crypto_util.cert_and_chain_from_fullchain(orderr.fullchain_pem)
 
     def obtain_certificate(self, domains):
         """Obtains a certificate from the ACME server.
@@ -298,10 +274,9 @@ class Client(object):
 
         :param list domains: domains to get a certificate
 
-        :returns: `.CertificateResource`, certificate chain (as
-            returned by `.fetch_chain`), and newly generated private key
-            (`.util.Key`) and DER-encoded Certificate Signing Request
-            (`.util.CSR`).
+        :returns: :returns: certificate as PEM string, chain as PEM string,
+            newly generated private key (`.util.Key`), and DER-encoded
+            Certificate Signing Request (`.util.CSR`).
         :rtype: tuple
 
         """
@@ -329,9 +304,9 @@ class Client(object):
                 os.remove(csr.file)
             return self.obtain_certificate(successful_domains)
         else:
-            certr, chain = self.obtain_certificate_from_csr(csr, orderr)
+            cert, chain = self.obtain_certificate_from_csr(csr, orderr)
 
-            return certr, chain, key, csr
+            return cert, chain, key, csr
 
     # pylint: disable=no-member
     def obtain_and_enroll_certificate(self, domains, certname):
@@ -350,7 +325,7 @@ class Client(object):
             be obtained, or None if doing a successful dry run.
 
         """
-        certr, chain, key, _ = self.obtain_certificate(domains)
+        cert, chain, key, _ = self.obtain_certificate(domains)
 
         if (self.config.config_dir != constants.CLI_DEFAULTS["config_dir"] or
                 self.config.work_dir != constants.CLI_DEFAULTS["work_dir"]):
@@ -365,19 +340,16 @@ class Client(object):
             return None
         else:
             return storage.RenewableCert.new_lineage(
-                new_name, OpenSSL.crypto.dump_certificate(
-                    OpenSSL.crypto.FILETYPE_PEM, certr.body.wrapped),
-                key.pem, crypto_util.dump_pyopenssl_chain(chain),
+                new_name, cert,
+                key.pem, chain,
                 self.config)
 
-    def save_certificate(self, certr, chain_cert,
+    def save_certificate(self, cert_pem, chain_pem,
                          cert_path, chain_path, fullchain_path):
         """Saves the certificate received from the ACME server.
 
-        :param certr: ACME "certificate" resource.
-        :type certr: :class:`acme.messages.Certificate`
-
-        :param list chain_cert:
+        :param str cert_pem:
+        :param str chain_pem:
         :param str cert_path: Candidate path to a certificate.
         :param str chain_path: Candidate path to a certificate chain.
         :param str fullchain_path: Candidate path to a full cert chain.
@@ -394,8 +366,6 @@ class Client(object):
                 os.path.dirname(path), 0o755, os.geteuid(),
                 self.config.strict_permissions)
 
-        cert_pem = OpenSSL.crypto.dump_certificate(
-            OpenSSL.crypto.FILETYPE_PEM, certr.body.wrapped)
 
         cert_file, abs_cert_path = _open_pem_file('cert_path', cert_path)
 
@@ -406,20 +376,15 @@ class Client(object):
         logger.info("Server issued certificate; certificate written to %s",
                     abs_cert_path)
 
-        if not chain_cert:
-            return abs_cert_path, None, None
-        else:
-            chain_pem = crypto_util.dump_pyopenssl_chain(chain_cert)
+        chain_file, abs_chain_path =\
+                _open_pem_file('chain_path', chain_path)
+        fullchain_file, abs_fullchain_path =\
+                _open_pem_file('fullchain_path', fullchain_path)
 
-            chain_file, abs_chain_path =\
-                    _open_pem_file('chain_path', chain_path)
-            fullchain_file, abs_fullchain_path =\
-                    _open_pem_file('fullchain_path', fullchain_path)
+        _save_chain(chain_pem, chain_file)
+        _save_chain(cert_pem + chain_pem, fullchain_file)
 
-            _save_chain(chain_pem, chain_file)
-            _save_chain(cert_pem + chain_pem, fullchain_file)
-
-            return abs_cert_path, abs_chain_path, abs_fullchain_path
+        return abs_cert_path, abs_chain_path, abs_fullchain_path
 
     def deploy_certificate(self, domains, privkey_path,
                            cert_path, chain_path, fullchain_path):
diff --git a/certbot/crypto_util.py b/certbot/crypto_util.py
index 8368855cd..11721cc10 100644
--- a/certbot/crypto_util.py
+++ b/certbot/crypto_util.py
@@ -14,7 +14,6 @@ import six
 import zope.component
 from cryptography.hazmat.backends import default_backend
 from cryptography import x509
-import josepy as jose
 
 from acme import crypto_util as acme_crypto_util
 
@@ -367,16 +366,7 @@ def dump_pyopenssl_chain(chain, filetype=OpenSSL.crypto.FILETYPE_PEM):
     """
     # XXX: returns empty string when no chain is available, which
     # shuts up RenewableCert, but might not be the best solution...
-
-    def _dump_cert(cert):
-        if isinstance(cert, jose.ComparableX509):
-            # pylint: disable=protected-access
-            cert = cert.wrapped
-        return OpenSSL.crypto.dump_certificate(filetype, cert)
-
-    # assumes that OpenSSL.crypto.dump_certificate includes ending
-    # newline character
-    return b"".join(_dump_cert(cert) for cert in chain)
+    return acme_crypto_util.dump_pyopenssl_chain(chain, filetype)
 
 
 def notBefore(cert_path):
@@ -443,3 +433,16 @@ def sha256sum(filename):
     with open(filename, 'rb') as f:
         sha256.update(f.read())
     return sha256.hexdigest()
+
+def cert_and_chain_from_fullchain(fullchain_pem):
+    """Split fullchain_pem into cert_pem and chain_pem
+
+    :param str fullchain_pem: concatenated cert + chain
+
+    :returns: tuple of string cert_pem and chain_pem
+    :rtype: tuple
+    """
+    cert = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM,
+        OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, fullchain_pem))
+    chain = fullchain_pem[len(cert):]
+    return (cert, chain)
diff --git a/certbot/main.py b/certbot/main.py
index d01f68920..eff4c9c8f 100644
--- a/certbot/main.py
+++ b/certbot/main.py
@@ -1064,13 +1064,13 @@ def _csr_get_and_save_cert(config, le_client):
 
     """
     csr, _ = config.actual_csr
-    certr, chain = le_client.obtain_certificate_from_csr(csr)
+    cert, chain = le_client.obtain_certificate_from_csr(csr)
     if config.dry_run:
         logger.debug(
             "Dry run: skipping saving certificate to %s", config.cert_path)
         return None, None
     cert_path, _, fullchain_path = le_client.save_certificate(
-            certr, chain, config.cert_path, config.chain_path, config.fullchain_path)
+            cert, chain, config.cert_path, config.chain_path, config.fullchain_path)
     return cert_path, fullchain_path
 
 def renew_cert(config, plugins, lineage):
diff --git a/certbot/renewal.py b/certbot/renewal.py
index 024a815cc..ea5d87a5e 100644
--- a/certbot/renewal.py
+++ b/certbot/renewal.py
@@ -294,15 +294,12 @@ def renew_cert(config, domains, le_client, lineage):
     _avoid_invalidating_lineage(config, lineage, original_server)
     if not domains:
         domains = lineage.names()
-    new_certr, new_chain, new_key, _ = le_client.obtain_certificate(domains)
+    new_cert, new_chain, new_key, _ = le_client.obtain_certificate(domains)
     if config.dry_run:
         logger.debug("Dry run: skipping updating lineage at %s",
                     os.path.dirname(lineage.cert))
     else:
         prior_version = lineage.latest_common_version()
-        new_cert = OpenSSL.crypto.dump_certificate(
-            OpenSSL.crypto.FILETYPE_PEM, new_certr.body.wrapped)
-        new_chain = crypto_util.dump_pyopenssl_chain(new_chain)
         # TODO: Check return value of save_successor
         lineage.save_successor(prior_version, new_cert, new_key.pem, new_chain, config)
         lineage.update_all_links_to(lineage.latest_common_version())
diff --git a/certbot/tests/client_test.py b/certbot/tests/client_test.py
index a65341692..ed9c140e7 100644
--- a/certbot/tests/client_test.py
+++ b/certbot/tests/client_test.py
@@ -4,12 +4,8 @@ import shutil
 import tempfile
 import unittest
 
-import josepy as jose
-import OpenSSL
 import mock
 
-from acme import errors as acme_errors
-
 from certbot import account
 from certbot import errors
 from certbot import util
@@ -134,7 +130,10 @@ class ClientTest(ClientTestCommon):
         self.config.allow_subset_of_names = False
         self.config.dry_run = False
         self.eg_domains = ["example.com", "www.example.com"]
-        self.eg_order = mock.MagicMock(authorizations=[None])
+        self.eg_order = mock.MagicMock(
+            authorizations=[None],
+            fullchain_pem=mock.sentinel.fullchain_pem,
+            csr_pem=mock.sentinel.csr_pem)
 
     def test_init_acme_verify_ssl(self):
         net = self.acme_client.call_args[0][0]
@@ -143,9 +142,9 @@ class ClientTest(ClientTestCommon):
     def _mock_obtain_certificate(self):
         self.client.auth_handler = mock.MagicMock()
         self.client.auth_handler.handle_authorizations.return_value = [None]
-        self.acme.request_issuance.return_value = mock.sentinel.certr
-        self.acme.fetch_chain.return_value = mock.sentinel.chain
+        self.acme.finalize_order.return_value = self.eg_order
         self.acme.new_order.return_value = self.eg_order
+        self.eg_order.update.return_value = self.eg_order
 
     def _check_obtain_certificate(self, auth_count=1):
         if auth_count == 1:
@@ -155,27 +154,24 @@ class ClientTest(ClientTestCommon):
         else:
             self.assertEqual(self.client.auth_handler.handle_authorizations.call_count, auth_count)
 
-        authzr = self.client.auth_handler.handle_authorizations()
-
-        self.acme.request_issuance.assert_called_once_with(
-            jose.ComparableX509(OpenSSL.crypto.load_certificate_request(
-                OpenSSL.crypto.FILETYPE_PEM, CSR_SAN)),
-            authzr)
-
-        self.acme.fetch_chain.assert_called_once_with(mock.sentinel.certr)
+        self.acme.finalize_order.assert_called_once_with(
+            self.eg_order, mock.ANY)
 
+    @mock.patch("certbot.client.crypto_util")
     @mock.patch("certbot.client.logger")
     @test_util.patch_get_utility()
     def test_obtain_certificate_from_csr(self, unused_mock_get_utility,
-                                         mock_logger):
+                                         mock_logger, mock_crypto_util):
         self._mock_obtain_certificate()
         test_csr = util.CSR(form="pem", file=None, data=CSR_SAN)
         auth_handler = self.client.auth_handler
+        mock_crypto_util.cert_and_chain_from_fullchain.return_value = (mock.sentinel.cert,
+            mock.sentinel.chain)
 
         orderr = self.acme.new_order(test_csr.data)
         auth_handler.handle_authorizations(orderr, False)
         self.assertEqual(
-            (mock.sentinel.certr, mock.sentinel.chain),
+            (mock.sentinel.cert, mock.sentinel.chain),
             self.client.obtain_certificate_from_csr(
                 test_csr,
                 orderr=orderr))
@@ -184,7 +180,7 @@ class ClientTest(ClientTestCommon):
 
         # Test for orderr=None
         self.assertEqual(
-            (mock.sentinel.certr, mock.sentinel.chain),
+            (mock.sentinel.cert, mock.sentinel.chain),
             self.client.obtain_certificate_from_csr(
                 test_csr,
                 orderr=None))
@@ -198,41 +194,13 @@ class ClientTest(ClientTestCommon):
             test_csr)
         mock_logger.warning.assert_called_once_with(mock.ANY)
 
-    @test_util.patch_get_utility()
-    def test_obtain_certificate_from_csr_retry_succeeded(
-            self, mock_get_utility):
-        self._mock_obtain_certificate()
-        self.acme.fetch_chain.side_effect = [acme_errors.Error,
-                                             mock.sentinel.chain]
-        test_csr = util.CSR(form="der", file=None, data=CSR_SAN)
-
-        orderr = self.acme.new_order(test_csr.data)
-        self.assertEqual(
-            (mock.sentinel.certr, mock.sentinel.chain),
-            self.client.obtain_certificate_from_csr(
-                test_csr,
-                orderr=orderr))
-        self.assertEqual(1, mock_get_utility().notification.call_count)
-
-    @test_util.patch_get_utility()
-    def test_obtain_certificate_from_csr_retry_failed(self, mock_get_utility):
-        self._mock_obtain_certificate()
-        self.acme.fetch_chain.side_effect = acme_errors.Error
-        test_csr = util.CSR(form="der", file=None, data=CSR_SAN)
-
-        orderr = self.acme.new_order(test_csr.data)
-        self.assertRaises(
-            acme_errors.Error,
-            self.client.obtain_certificate_from_csr,
-            test_csr,
-            orderr=orderr)
-        self.assertEqual(1, mock_get_utility().notification.call_count)
-
     @mock.patch("certbot.client.crypto_util")
     def test_obtain_certificate(self, mock_crypto_util):
         csr = util.CSR(form="pem", file=None, data=CSR_SAN)
         mock_crypto_util.init_save_csr.return_value = csr
         mock_crypto_util.init_save_key.return_value = mock.sentinel.key
+        mock_crypto_util.cert_and_chain_from_fullchain.return_value = (mock.sentinel.cert,
+            mock.sentinel.chain)
 
         self._test_obtain_certificate_common(mock.sentinel.key, csr)
 
@@ -240,6 +208,8 @@ class ClientTest(ClientTestCommon):
             self.config.rsa_key_size, self.config.key_dir)
         mock_crypto_util.init_save_csr.assert_called_once_with(
             mock.sentinel.key, self.eg_domains, self.config.csr_dir)
+        mock_crypto_util.cert_and_chain_from_fullchain.assert_called_once_with(
+            mock.sentinel.fullchain_pem)
 
     @mock.patch("certbot.client.crypto_util")
     @mock.patch("os.remove")
@@ -248,6 +218,8 @@ class ClientTest(ClientTestCommon):
         key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
         mock_crypto_util.init_save_csr.return_value = csr
         mock_crypto_util.init_save_key.return_value = key
+        mock_crypto_util.cert_and_chain_from_fullchain.return_value = (mock.sentinel.cert,
+            mock.sentinel.chain)
 
         authzr = self._authzr_from_domains(["example.com"])
         self._test_obtain_certificate_common(key, csr, authzr_ret=authzr, auth_count=2)
@@ -255,6 +227,7 @@ class ClientTest(ClientTestCommon):
         self.assertEqual(mock_crypto_util.init_save_key.call_count, 2)
         self.assertEqual(mock_crypto_util.init_save_csr.call_count, 2)
         self.assertEqual(mock_remove.call_count, 2)
+        self.assertEqual(mock_crypto_util.cert_and_chain_from_fullchain.call_count, 1)
 
     @mock.patch("certbot.client.crypto_util")
     @mock.patch("certbot.client.acme_crypto_util")
@@ -263,6 +236,8 @@ class ClientTest(ClientTestCommon):
         mock_acme_crypto.make_csr.return_value = CSR_SAN
         mock_crypto.make_key.return_value = mock.sentinel.key_pem
         key = util.Key(file=None, pem=mock.sentinel.key_pem)
+        mock_crypto.cert_and_chain_from_fullchain.return_value = (mock.sentinel.cert,
+            mock.sentinel.chain)
 
         self.client.config.dry_run = True
         self._test_obtain_certificate_common(key, csr)
@@ -272,6 +247,7 @@ class ClientTest(ClientTestCommon):
             mock.sentinel.key_pem, self.eg_domains, self.config.must_staple)
         mock_crypto.init_save_key.assert_not_called()
         mock_crypto.init_save_csr.assert_not_called()
+        self.assertEqual(mock_crypto.cert_and_chain_from_fullchain.call_count, 1)
 
     def _authzr_from_domains(self, domains):
         authzr = []
@@ -294,7 +270,6 @@ class ClientTest(ClientTestCommon):
         authzr = authzr_ret or self._authzr_from_domains(self.eg_domains)
 
         self.eg_order.authorizations = authzr
-        self.eg_order.update().authorizations = authzr
         self.client.auth_handler.handle_authorizations.return_value = authzr
 
         with test_util.patch_get_utility():
@@ -302,13 +277,12 @@ class ClientTest(ClientTestCommon):
 
         self.assertEqual(
             result,
-            (mock.sentinel.certr, mock.sentinel.chain, key, csr))
+            (mock.sentinel.cert, mock.sentinel.chain, key, csr))
         self._check_obtain_certificate(auth_count)
 
     @mock.patch('certbot.client.Client.obtain_certificate')
     @mock.patch('certbot.storage.RenewableCert.new_lineage')
-    @mock.patch('OpenSSL.crypto.dump_certificate')
-    def test_obtain_and_enroll_certificate(self, mock_dump_certificate,
+    def test_obtain_and_enroll_certificate(self,
         mock_storage, mock_obtain_certificate):
         domains = ["example.com", "www.example.com"]
         mock_obtain_certificate.return_value = (mock.MagicMock(),
@@ -324,7 +298,6 @@ class ClientTest(ClientTestCommon):
         self.assertFalse(self.client.obtain_and_enroll_certificate(domains, None))
 
         self.assertTrue(mock_storage.call_count == 2)
-        self.assertTrue(mock_dump_certificate.call_count == 2)
 
     @mock.patch("certbot.cli.helpful_parser")
     def test_save_certificate(self, mock_parser):
@@ -333,9 +306,8 @@ class ClientTest(ClientTestCommon):
         tmp_path = tempfile.mkdtemp()
         os.chmod(tmp_path, 0o755)  # TODO: really??
 
-        certr = mock.MagicMock(body=test_util.load_comparable_cert(certs[0]))
-        chain_cert = [test_util.load_comparable_cert(certs[0]),
-                      test_util.load_comparable_cert(certs[1])]
+        cert_pem = test_util.load_vector(certs[0])
+        chain_pem = (test_util.load_vector(certs[0]) + test_util.load_vector(certs[1]))
         candidate_cert_path = os.path.join(tmp_path, "certs", "cert_512.pem")
         candidate_chain_path = os.path.join(tmp_path, "chains", "chain.pem")
         candidate_fullchain_path = os.path.join(tmp_path, "chains", "fullchain.pem")
@@ -345,7 +317,7 @@ class ClientTest(ClientTestCommon):
                 "--fullchain-path", candidate_fullchain_path]
 
         cert_path, chain_path, fullchain_path = self.client.save_certificate(
-            certr, chain_cert, candidate_cert_path, candidate_chain_path,
+            cert_pem, chain_pem, candidate_cert_path, candidate_chain_path,
             candidate_fullchain_path)
 
         self.assertEqual(os.path.dirname(cert_path),
diff --git a/certbot/tests/crypto_util_test.py b/certbot/tests/crypto_util_test.py
index f0e2c017e..00303fab3 100644
--- a/certbot/tests/crypto_util_test.py
+++ b/certbot/tests/crypto_util_test.py
@@ -373,5 +373,18 @@ class Sha256sumTest(unittest.TestCase):
             '914ffed8daf9e2c99d90ac95c77d54f32cbd556672facac380f0c063498df84e')
 
 
+class CertAndChainFromFullchainTest(unittest.TestCase):
+    """Tests for certbot.crypto_util.cert_and_chain_from_fullchain"""
+
+    def test_cert_and_chain_from_fullchain(self):
+        cert_pem = CERT
+        chain_pem = CERT + SS_CERT
+        fullchain_pem = cert_pem + chain_pem
+        from certbot.crypto_util import cert_and_chain_from_fullchain
+        cert_out, chain_out = cert_and_chain_from_fullchain(fullchain_pem)
+        self.assertEqual(cert_out, cert_pem)
+        self.assertEqual(chain_out, chain_pem)
+
+
 if __name__ == '__main__':
     unittest.main()  # pragma: no cover
diff --git a/certbot/tests/util.py b/certbot/tests/util.py
index 60d8d6084..8434d11de 100644
--- a/certbot/tests/util.py
+++ b/certbot/tests/util.py
@@ -57,11 +57,6 @@ def load_cert(*names):
     return OpenSSL.crypto.load_certificate(loader, load_vector(*names))
 
 
-def load_comparable_cert(*names):
-    """Load ComparableX509 cert."""
-    return jose.ComparableX509(load_cert(*names))
-
-
 def load_csr(*names):
     """Load certificate request."""
     loader = _guess_loader(