--- /dev/null
+From 0131c649d057a513a6bdc0b4b6eac7ea0bd9a9e8 Mon Sep 17 00:00:00 2001
+From: Brad Warren <bmw@users.noreply.github.com>
+Date: Fri, 16 Mar 2018 18:44:23 -0700
+Subject: [PATCH] Fix acme.client.Client.__init__ (#5747) (#5748)
+
+* fixes #5738
+
+* add test to prevent regressions
+
+(cherry picked from commit ba6bdb50998bd55aeef7972a5c839560e02142f3)
+---
+ acme/acme/client.py | 5 +++--
+ acme/acme/client_test.py | 10 ++++++++++
+ 2 files changed, 13 insertions(+), 2 deletions(-)
+
+diff --git acme/acme/client.py acme/acme/client.py
+index 9e2478afe4..19615b087b 100644
+--- acme/acme/client.py
++++ acme/acme/client.py
+@@ -259,11 +259,12 @@ def __init__(self, directory, key, alg=jose.RS256, verify_ssl=True,
+ """
+ # pylint: disable=too-many-arguments
+ self.key = key
+- self.net = ClientNetwork(key, alg=alg, verify_ssl=verify_ssl) if net is None else net
++ if net is None:
++ net = ClientNetwork(key, alg=alg, verify_ssl=verify_ssl)
+
+ if isinstance(directory, six.string_types):
+ directory = messages.Directory.from_json(
+- self.net.get(directory).json())
++ net.get(directory).json())
+ super(Client, self).__init__(directory=directory,
+ net=net, acme_version=1)
+
+diff --git acme/acme/client_test.py acme/acme/client_test.py
+index 00b9e19dd0..be08c2919f 100644
+--- acme/acme/client_test.py
++++ acme/acme/client_test.py
+@@ -299,6 +299,16 @@ def test_init_downloads_directory(self):
+ directory=uri, key=KEY, alg=jose.RS256, net=self.net)
+ self.net.get.assert_called_once_with(uri)
+
++ @mock.patch('acme.client.ClientNetwork')
++ def test_init_without_net(self, mock_net):
++ mock_net.return_value = mock.sentinel.net
++ alg = jose.RS256
++ from acme.client import Client
++ self.client = Client(
++ directory=self.directory, key=KEY, alg=alg)
++ mock_net.called_once_with(KEY, alg=alg, verify_ssl=True)
++ self.assertEqual(self.client.net, mock.sentinel.net)
++
+ def test_register(self):
+ # "Instance of 'Field' has no to_json/update member" bug:
+ # pylint: disable=no-member