diff --git a/test-requirements.txt b/test-requirements.txt
index 9ba63d75..91375e83 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,6 +6,7 @@ hacking<0.12,>=0.11.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
+flake8-import-order==0.12 # LGPLv3
 mock>=2.0 # BSD
 python-subunit>=0.0.18 # Apache-2.0/BSD
 sphinx>=1.6.2 # BSD
diff --git a/tox.ini b/tox.ini
index 518a0aec..54b3b4b3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -88,6 +88,7 @@ ignore = N530,E125,E129,N531
 show-source = true
 builtins = _
 exclude = build,dist
+import-order-style = pep8
 
 [hacking]
 import_exceptions = vmware_nsxlib._i18n,
diff --git a/vmware_nsxlib/tests/unit/v3/nsxlib_testcase.py b/vmware_nsxlib/tests/unit/v3/nsxlib_testcase.py
index 394acdb7..76f4a828 100644
--- a/vmware_nsxlib/tests/unit/v3/nsxlib_testcase.py
+++ b/vmware_nsxlib/tests/unit/v3/nsxlib_testcase.py
@@ -14,9 +14,9 @@
 # limitations under the License.
 #
 import copy
-import mock
 import unittest
 
+import mock
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils
 from requests import exceptions as requests_exceptions
diff --git a/vmware_nsxlib/tests/unit/v3/test_client.py b/vmware_nsxlib/tests/unit/v3/test_client.py
index f132d859..9c35c0f7 100644
--- a/vmware_nsxlib/tests/unit/v3/test_client.py
+++ b/vmware_nsxlib/tests/unit/v3/test_client.py
@@ -14,10 +14,10 @@
 #    under the License.
 #
 import copy
-import requests
 
 from oslo_log import log
 from oslo_serialization import jsonutils
+import requests
 
 from vmware_nsxlib.tests.unit.v3 import mocks
 from vmware_nsxlib.tests.unit.v3 import nsxlib_testcase
diff --git a/vmware_nsxlib/tests/unit/v3/test_cluster.py b/vmware_nsxlib/tests/unit/v3/test_cluster.py
index 0c30cba6..342180a4 100644
--- a/vmware_nsxlib/tests/unit/v3/test_cluster.py
+++ b/vmware_nsxlib/tests/unit/v3/test_cluster.py
@@ -13,12 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 #
-import mock
-import six.moves.urllib.parse as urlparse
 import unittest
 
+import mock
 from oslo_serialization import jsonutils
 from requests import exceptions as requests_exceptions
+import six.moves.urllib.parse as urlparse
 
 from vmware_nsxlib.tests.unit.v3 import mocks
 from vmware_nsxlib.tests.unit.v3 import nsxlib_testcase
diff --git a/vmware_nsxlib/tests/unit/v3/test_policy_resources.py b/vmware_nsxlib/tests/unit/v3/test_policy_resources.py
index df8516c3..96532abf 100644
--- a/vmware_nsxlib/tests/unit/v3/test_policy_resources.py
+++ b/vmware_nsxlib/tests/unit/v3/test_policy_resources.py
@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 #
-import mock
 import unittest
 
+import mock
+
 from vmware_nsxlib.tests.unit.v3 import nsxlib_testcase
 from vmware_nsxlib import v3
 from vmware_nsxlib.v3 import policy_constants
diff --git a/vmware_nsxlib/tests/unit/v3/test_qos_switching_profile.py b/vmware_nsxlib/tests/unit/v3/test_qos_switching_profile.py
index fdfec45a..a0fe17ee 100644
--- a/vmware_nsxlib/tests/unit/v3/test_qos_switching_profile.py
+++ b/vmware_nsxlib/tests/unit/v3/test_qos_switching_profile.py
@@ -14,8 +14,8 @@
 # limitations under the License.
 #
 import copy
-import mock
 
+import mock
 from oslo_log import log
 
 from vmware_nsxlib.tests.unit.v3 import nsxlib_testcase
diff --git a/vmware_nsxlib/v3/__init__.py b/vmware_nsxlib/v3/__init__.py
index 112984b0..08808cbf 100644
--- a/vmware_nsxlib/v3/__init__.py
+++ b/vmware_nsxlib/v3/__init__.py
@@ -14,10 +14,10 @@
 #    under the License.
 
 import abc
-import six
-
 from distutils import version
+
 from oslo_log import log
+import six
 
 from vmware_nsxlib._i18n import _
 from vmware_nsxlib.v3 import client
diff --git a/vmware_nsxlib/v3/client.py b/vmware_nsxlib/v3/client.py
index 45e51cb7..7dd0c87e 100644
--- a/vmware_nsxlib/v3/client.py
+++ b/vmware_nsxlib/v3/client.py
@@ -14,12 +14,12 @@
 #    under the License.
 #
 import re
-import requests
-import six.moves.urllib.parse as urlparse
 import time
 
 from oslo_log import log
 from oslo_serialization import jsonutils
+import requests
+import six.moves.urllib.parse as urlparse
 from vmware_nsxlib._i18n import _
 from vmware_nsxlib.v3 import exceptions
 from vmware_nsxlib.v3 import utils
diff --git a/vmware_nsxlib/v3/client_cert.py b/vmware_nsxlib/v3/client_cert.py
index c46e6ab2..b722acf6 100644
--- a/vmware_nsxlib/v3/client_cert.py
+++ b/vmware_nsxlib/v3/client_cert.py
@@ -14,11 +14,11 @@
 #    under the License.
 
 import datetime
-from OpenSSL import crypto
 from time import time
 import uuid
 
 from neutron_lib import exceptions
+from OpenSSL import crypto
 from oslo_log import log
 
 from vmware_nsxlib._i18n import _
diff --git a/vmware_nsxlib/v3/cluster.py b/vmware_nsxlib/v3/cluster.py
index a6e664c5..6de60c69 100644
--- a/vmware_nsxlib/v3/cluster.py
+++ b/vmware_nsxlib/v3/cluster.py
@@ -17,20 +17,21 @@ import abc
 import contextlib
 import copy
 import datetime
-import eventlet
 import itertools
 import logging
+
+import eventlet
+from eventlet import greenpool
+from eventlet import pools
 import OpenSSL
+from oslo_log import log
+from oslo_service import loopingcall
 import requests
+from requests import adapters
+from requests import exceptions as requests_exceptions
 import six
 import six.moves.urllib.parse as urlparse
 
-from eventlet import greenpool
-from eventlet import pools
-from oslo_log import log
-from oslo_service import loopingcall
-from requests import adapters
-from requests import exceptions as requests_exceptions
 from vmware_nsxlib._i18n import _
 from vmware_nsxlib.v3 import client as nsx_client
 from vmware_nsxlib.v3 import exceptions
diff --git a/vmware_nsxlib/v3/policy_defs.py b/vmware_nsxlib/v3/policy_defs.py
index a3afa311..8d74baa0 100644
--- a/vmware_nsxlib/v3/policy_defs.py
+++ b/vmware_nsxlib/v3/policy_defs.py
@@ -15,6 +15,7 @@
 #
 
 import abc
+
 import six
 
 from vmware_nsxlib.v3 import policy_constants
diff --git a/vmware_nsxlib/v3/policy_resources.py b/vmware_nsxlib/v3/policy_resources.py
index 5510db46..b20c41eb 100644
--- a/vmware_nsxlib/v3/policy_resources.py
+++ b/vmware_nsxlib/v3/policy_resources.py
@@ -15,10 +15,10 @@
 #
 
 import abc
-import six
 import uuid
 
 from oslo_log import log as logging
+import six
 
 from vmware_nsxlib._i18n import _
 from vmware_nsxlib.v3 import exceptions
diff --git a/vmware_nsxlib/v3/utils.py b/vmware_nsxlib/v3/utils.py
index 15373e88..d1cc221a 100644
--- a/vmware_nsxlib/v3/utils.py
+++ b/vmware_nsxlib/v3/utils.py
@@ -14,10 +14,10 @@
 #    under the License.
 
 import abc
-import tenacity
 
 from neutron_lib import exceptions
 from oslo_log import log
+import tenacity
 
 from vmware_nsxlib._i18n import _
 from vmware_nsxlib.v3 import exceptions as nsxlib_exceptions