diff --git a/oslo/concurrency/lockutils.py b/oslo/concurrency/lockutils.py
index ba98347..1b6cc1a 100644
--- a/oslo/concurrency/lockutils.py
+++ b/oslo/concurrency/lockutils.py
@@ -28,7 +28,7 @@ import weakref
 
 from oslo.config import cfg
 
-from oslo.concurrency._i18n import _, _LE, _LI  # noqa
+from oslo.concurrency._i18n import _, _LE, _LI
 from oslo.concurrency.openstack.common import fileutils
 
 
diff --git a/oslo/concurrency/processutils.py b/oslo/concurrency/processutils.py
index 1c4d052..95c94bb 100644
--- a/oslo/concurrency/processutils.py
+++ b/oslo/concurrency/processutils.py
@@ -30,7 +30,7 @@ from eventlet import greenthread
 from oslo.utils import strutils
 import six
 
-from oslo.concurrency._i18n import _  # noqa
+from oslo.concurrency._i18n import _
 
 
 LOG = logging.getLogger(__name__)
diff --git a/tox.ini b/tox.ini
index 56138b3..cc5db6a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -49,3 +49,7 @@ show-source = True
 ignore = H305,H307,H405,E126
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build
+
+[hacking]
+import_exceptions =
+  oslo.concurrency._i18n