diff --git a/ansible_mitogen/connection.py b/ansible_mitogen/connection.py
index b5f80910..90b5e41a 100644
--- a/ansible_mitogen/connection.py
+++ b/ansible_mitogen/connection.py
@@ -31,7 +31,6 @@ import logging
 import os
 import shlex
 import stat
-import sys
 import time
 
 import jinja2.runtime
@@ -58,6 +57,7 @@ def _connect_local(spec):
         }
     }
 
+
 def wrap_or_none(klass, value):
     if value is not None:
         return klass(value)
@@ -393,7 +393,7 @@ class Connection(ansible.plugins.connection.ConnectionBase):
             raise ansible.errors.AnsibleConnectionFailure(
                 self.unknown_via_msg % (
                     self.mitogen_via,
-                    config['inventory_name'],
+                    inventory_name,
                 )
             )
 
diff --git a/ansible_mitogen/mixins.py b/ansible_mitogen/mixins.py
index 18d29da3..e4a7a748 100644
--- a/ansible_mitogen/mixins.py
+++ b/ansible_mitogen/mixins.py
@@ -32,7 +32,6 @@ import logging
 import os
 import pwd
 import shutil
-import tempfile
 import traceback
 
 from ansible.module_utils._text import to_bytes
@@ -43,11 +42,6 @@ import ansible.constants
 import ansible.plugins
 import ansible.plugins.action
 
-try:
-    from ansible.plugins.loader import module_loader
-except ImportError:  # Ansible<2.4
-    from ansible.plugins import module_loader
-
 import mitogen.core
 import mitogen.select
 import mitogen.utils
diff --git a/ansible_mitogen/module_finder.py b/ansible_mitogen/module_finder.py
index 1d062454..79e1882c 100644
--- a/ansible_mitogen/module_finder.py
+++ b/ansible_mitogen/module_finder.py
@@ -85,7 +85,7 @@ def find(name, path=(), parent=None):
     head, _, tail = name.partition('.')
     try:
         tup = imp.find_module(head, list(path))
-    except ImportError as e:
+    except ImportError:
         return parent
 
     fp, modpath, (suffix, mode, kind) = tup
diff --git a/ansible_mitogen/planner.py b/ansible_mitogen/planner.py
index c540119b..1006956c 100644
--- a/ansible_mitogen/planner.py
+++ b/ansible_mitogen/planner.py
@@ -52,9 +52,7 @@ except ImportError:  # Ansible <2.4
     from ansible.plugins import module_utils_loader
 
 import mitogen
-import mitogen.service
 import ansible_mitogen.target
-import ansible_mitogen.services
 
 
 LOG = logging.getLogger(__name__)
diff --git a/ansible_mitogen/process.py b/ansible_mitogen/process.py
index e97d695d..c4f58310 100644
--- a/ansible_mitogen/process.py
+++ b/ansible_mitogen/process.py
@@ -136,7 +136,7 @@ class MuxProcess(object):
         """
         Construct a Router, Broker, and mitogen.unix listener
         """
-        self.router = mitogen.master.Router(max_message_size=4096*1048576)
+        self.router = mitogen.master.Router(max_message_size=4096 * 1048576)
         self.router.responder.whitelist_prefix('ansible')
         self.router.responder.whitelist_prefix('ansible_mitogen')
         mitogen.core.listen(self.router.broker, 'shutdown', self.on_broker_shutdown)
diff --git a/ansible_mitogen/runner.py b/ansible_mitogen/runner.py
index 522f1e2e..e14d26bd 100644
--- a/ansible_mitogen/runner.py
+++ b/ansible_mitogen/runner.py
@@ -42,7 +42,6 @@ import imp
 import json
 import logging
 import os
-import shutil
 import sys
 import tempfile
 import types
diff --git a/ansible_mitogen/strategy.py b/ansible_mitogen/strategy.py
index ce528c7f..2fd4cb91 100644
--- a/ansible_mitogen/strategy.py
+++ b/ansible_mitogen/strategy.py
@@ -29,7 +29,6 @@
 from __future__ import absolute_import
 import os
 
-import ansible.errors
 import ansible_mitogen.mixins
 import ansible_mitogen.process
 
diff --git a/ansible_mitogen/target.py b/ansible_mitogen/target.py
index 3ac97c2f..6dbaca8c 100644
--- a/ansible_mitogen/target.py
+++ b/ansible_mitogen/target.py
@@ -32,7 +32,6 @@ for file transfer, module execution and sundry bits like changing file modes.
 """
 
 from __future__ import absolute_import
-import cStringIO
 import errno
 import grp
 import json
@@ -44,7 +43,6 @@ import re
 import stat
 import subprocess
 import tempfile
-import time
 import traceback
 
 import ansible.module_utils.json_utils
diff --git a/mitogen/service.py b/mitogen/service.py
index 3e05deb7..62180e33 100644
--- a/mitogen/service.py
+++ b/mitogen/service.py
@@ -34,6 +34,7 @@ import pwd
 import stat
 import sys
 import threading
+import time
 
 import mitogen.core
 import mitogen.select