diff --git a/nova/api/openstack/placement/wsgi.py b/nova/api/openstack/placement/wsgi.py
index 087a0f59bc6..c982f90f9d9 100644
--- a/nova/api/openstack/placement/wsgi.py
+++ b/nova/api/openstack/placement/wsgi.py
@@ -18,12 +18,12 @@
 import os
 import os.path
 
+from oslo_log import log as logging
+
 from nova.api.openstack.placement import deploy
 from nova import conf
 from nova import config
 
-from oslo_log import log as logging
-
 CONFIG_FILE = 'nova.conf'
 
 
diff --git a/nova/conf/database.py b/nova/conf/database.py
index e2a3483c6d4..b0d64db356b 100644
--- a/nova/conf/database.py
+++ b/nova/conf/database.py
@@ -13,11 +13,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from nova.conf import paths
-
 from oslo_config import cfg
 from oslo_db import options as oslo_db_options
 
+from nova.conf import paths
+
 _DEFAULT_SQL_CONNECTION = 'sqlite:///' + paths.state_path_def('nova.sqlite')
 
 
diff --git a/nova/conf/xvp.py b/nova/conf/xvp.py
index 5c608801bc9..fe83484ce26 100644
--- a/nova/conf/xvp.py
+++ b/nova/conf/xvp.py
@@ -13,10 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from nova.conf import paths
-
 from oslo_config import cfg
 
+from nova.conf import paths
+
 xvp_group = cfg.OptGroup(
     'xvp',
     title='XVP options',
diff --git a/nova/tests/unit/api/openstack/compute/test_availability_zone.py b/nova/tests/unit/api/openstack/compute/test_availability_zone.py
index 5b06478fe78..d50d512a30d 100644
--- a/nova/tests/unit/api/openstack/compute/test_availability_zone.py
+++ b/nova/tests/unit/api/openstack/compute/test_availability_zone.py
@@ -15,6 +15,7 @@
 import datetime
 
 import iso8601
+from oslo_config import cfg
 
 from nova.api.openstack.compute import availability_zone as az_v21
 from nova.api.openstack.compute import extension_info
@@ -30,7 +31,6 @@
 from nova.tests.unit.image import fake
 from nova.tests.unit import matchers
 from nova.tests.unit.objects import test_service
-from oslo_config import cfg
 
 FAKE_UUID = fakes.FAKE_UUID
 
diff --git a/nova/tests/unit/api/openstack/test_wsgi.py b/nova/tests/unit/api/openstack/test_wsgi.py
index eddb184ce81..10b13c39218 100644
--- a/nova/tests/unit/api/openstack/test_wsgi.py
+++ b/nova/tests/unit/api/openstack/test_wsgi.py
@@ -11,6 +11,7 @@
 #    under the License.
 
 import mock
+from oslo_serialization import jsonutils
 import six
 import testscenarios
 import webob
@@ -24,7 +25,6 @@
 from nova.tests.unit.api.openstack import fakes
 from nova.tests.unit import matchers
 from nova.tests.unit import utils
-from oslo_serialization import jsonutils
 
 
 class MicroversionedTest(testscenarios.WithScenarios, test.NoDBTestCase):
diff --git a/nova/tests/unit/compute/test_host_api.py b/nova/tests/unit/compute/test_host_api.py
index 2091e4e755a..dc5bb0d5406 100644
--- a/nova/tests/unit/compute/test_host_api.py
+++ b/nova/tests/unit/compute/test_host_api.py
@@ -18,6 +18,7 @@
 
 import mock
 from oslo_serialization import jsonutils
+import testtools
 
 from nova.api.openstack.compute import services
 from nova.cells import utils as cells_utils
@@ -32,7 +33,6 @@
 from nova.tests.unit import fake_notifier
 from nova.tests.unit.objects import test_objects
 from nova.tests.unit.objects import test_service
-import testtools
 
 
 class ComputeHostAPITestCase(test.TestCase):
diff --git a/nova/tests/unit/objects/test_security_group.py b/nova/tests/unit/objects/test_security_group.py
index 363551f58df..931a479ec13 100644
--- a/nova/tests/unit/objects/test_security_group.py
+++ b/nova/tests/unit/objects/test_security_group.py
@@ -13,13 +13,13 @@
 #    under the License.
 
 import mock
+from oslo_versionedobjects import fixture as ovo_fixture
 
 from nova import db
 from nova.objects import instance
 from nova.objects import security_group
 from nova.tests.unit.objects import test_objects
 from nova.tests import uuidsentinel as uuids
-from oslo_versionedobjects import fixture as ovo_fixture
 
 
 fake_secgroup = {
diff --git a/nova/tests/unit/volume/test_cinder.py b/nova/tests/unit/volume/test_cinder.py
index 6d3aaf54415..f99337457ce 100644
--- a/nova/tests/unit/volume/test_cinder.py
+++ b/nova/tests/unit/volume/test_cinder.py
@@ -16,6 +16,7 @@
 from cinderclient import exceptions as cinder_exception
 from keystoneclient import exceptions as keystone_exception
 import mock
+from oslo_utils import timeutils
 
 import nova.conf
 from nova import context
@@ -25,8 +26,6 @@
 from nova.tests import uuidsentinel as uuids
 from nova.volume import cinder
 
-from oslo_utils import timeutils
-
 CONF = nova.conf.CONF
 
 
diff --git a/tox.ini b/tox.ini
index db0f286e4a9..bfbaf586dac 100644
--- a/tox.ini
+++ b/tox.ini
@@ -160,6 +160,7 @@ enable-extensions = H106,H203,H904
 ignore = E121,E122,E123,E124,E125,E126,E127,E128,E129,E131,E251,H405
 exclude =  .venv,.git,.tox,dist,doc,*lib/python*,*egg,build,tools/xenserver*,releasenotes
 import-order-style = pep8
+application-import-names = nova
 # To get a list of functions that are more complex than 25, set max-complexity
 # to 25 and run 'tox -epep8'.
 # 34 is currently the most complex thing we have