diff --git a/ansible_mitogen/connection.py b/ansible_mitogen/connection.py
index b6cb2237..ef21f606 100644
--- a/ansible_mitogen/connection.py
+++ b/ansible_mitogen/connection.py
@@ -37,8 +37,6 @@ import stat
 import sys
 import time
 
-import jinja2.runtime
-from ansible.module_utils import six
 import ansible.constants as C
 import ansible.errors
 import ansible.plugins.connection
diff --git a/ansible_mitogen/process.py b/ansible_mitogen/process.py
index 85ced27f..1f7741f6 100644
--- a/ansible_mitogen/process.py
+++ b/ansible_mitogen/process.py
@@ -28,7 +28,6 @@
 
 from __future__ import absolute_import
 import atexit
-import errno
 import logging
 import multiprocessing
 import os
@@ -36,7 +35,6 @@ import resource
 import signal
 import socket
 import sys
-import time
 
 try:
     import faulthandler
diff --git a/mitogen/core.py b/mitogen/core.py
index 843f5a04..be5d7e9c 100644
--- a/mitogen/core.py
+++ b/mitogen/core.py
@@ -3109,7 +3109,7 @@ class Broker(object):
         if sys.version_info < (2, 6):
             # import_module() is used to avoid dep scanner.
             os_fork = import_module('mitogen.os_fork')
-            mitogen.os_fork._notice_broker_or_pool(self)
+            os_fork._notice_broker_or_pool(self)
 
     def start_receive(self, stream):
         """
diff --git a/mitogen/doas.py b/mitogen/doas.py
index f3bf4c90..5b212b9b 100644
--- a/mitogen/doas.py
+++ b/mitogen/doas.py
@@ -33,7 +33,6 @@ import re
 
 import mitogen.core
 import mitogen.parent
-from mitogen.core import b
 
 
 LOG = logging.getLogger(__name__)
diff --git a/mitogen/profiler.py b/mitogen/profiler.py
index 51da9b18..bbf6086a 100644
--- a/mitogen/profiler.py
+++ b/mitogen/profiler.py
@@ -57,15 +57,12 @@ Example:
 from __future__ import print_function
 import os
 import pstats
-import cProfile
 import shutil
 import subprocess
 import sys
 import tempfile
 import time
 
-import mitogen.core
-
 
 def try_merge(stats, path):
     try:
diff --git a/mitogen/ssh.py b/mitogen/ssh.py
index b4c247c1..b3fb7bac 100644
--- a/mitogen/ssh.py
+++ b/mitogen/ssh.py
@@ -42,7 +42,6 @@ except ImportError:
 
 import mitogen.parent
 from mitogen.core import b
-from mitogen.core import bytes_partition
 
 try:
     any
diff --git a/mitogen/su.py b/mitogen/su.py
index 5e9a237a..9813632a 100644
--- a/mitogen/su.py
+++ b/mitogen/su.py
@@ -33,7 +33,6 @@ import re
 
 import mitogen.core
 import mitogen.parent
-from mitogen.core import b
 
 try:
     any
diff --git a/mitogen/sudo.py b/mitogen/sudo.py
index 725e6aff..bcb2e7be 100644
--- a/mitogen/sudo.py
+++ b/mitogen/sudo.py
@@ -35,7 +35,6 @@ import re
 
 import mitogen.core
 import mitogen.parent
-from mitogen.core import b
 
 
 LOG = logging.getLogger(__name__)
diff --git a/scripts/release-notes.py b/scripts/release-notes.py
index 1444d7a3..08b60c0c 100644
--- a/scripts/release-notes.py
+++ b/scripts/release-notes.py
@@ -3,7 +3,6 @@
 # Generate the fragment used to make email release announcements
 # usage: release-notes.py 0.2.6
 
-import os
 import sys
 import urllib
 import lxml.html