diff --git a/neutron_tempest_plugin/api/test_dhcp_ipv6.py b/neutron_tempest_plugin/api/test_dhcp_ipv6.py
index 69b4ea0..0fab75c 100644
--- a/neutron_tempest_plugin/api/test_dhcp_ipv6.py
+++ b/neutron_tempest_plugin/api/test_dhcp_ipv6.py
@@ -58,8 +58,8 @@
         ports = body['ports']
         for port in ports:
             if (port['device_owner'].startswith(
-                    constants.DEVICE_OWNER_ROUTER_INTF)
-                and port['device_id'] in [r['id'] for r in self.routers]):
+                    constants.DEVICE_OWNER_ROUTER_INTF) and
+                port['device_id'] in [r['id'] for r in self.routers]):
                 self.client.remove_router_interface_with_port_id(
                     port['device_id'], port['id']
                 )
diff --git a/neutron_tempest_plugin/api/test_network_ip_availability.py b/neutron_tempest_plugin/api/test_network_ip_availability.py
index ed56363..10aee2e 100644
--- a/neutron_tempest_plugin/api/test_network_ip_availability.py
+++ b/neutron_tempest_plugin/api/test_network_ip_availability.py
@@ -79,11 +79,11 @@
 def calc_total_ips(prefix, ip_version):
     # will calculate total ips after removing reserved.
     if ip_version == lib_constants.IP_VERSION_4:
-        total_ips = 2 ** (lib_constants.IPv4_BITS
-                          - prefix) - DEFAULT_IP4_RESERVED
+        total_ips = 2 ** (lib_constants.IPv4_BITS -
+                          prefix) - DEFAULT_IP4_RESERVED
     elif ip_version == lib_constants.IP_VERSION_6:
-        total_ips = 2 ** (lib_constants.IPv6_BITS
-                          - prefix) - DEFAULT_IP6_RESERVED
+        total_ips = 2 ** (lib_constants.IPv6_BITS -
+                          prefix) - DEFAULT_IP6_RESERVED
     return total_ips
 
 
diff --git a/neutron_tempest_plugin/api/test_routers.py b/neutron_tempest_plugin/api/test_routers.py
index bc657e0..d5d2e04 100644
--- a/neutron_tempest_plugin/api/test_routers.py
+++ b/neutron_tempest_plugin/api/test_routers.py
@@ -159,9 +159,12 @@
         # Add router interface with subnet id
         router = self._create_router(data_utils.rand_name('router'), True)
         intf = self.create_router_interface(router['id'], subnet['id'])
-        status_active = lambda: self.client.show_port(
-            intf['port_id'])['port']['status'] == 'ACTIVE'
-        utils.wait_until_true(status_active, exception=AssertionError)
+
+        def _status_active():
+            return self.client.show_port(
+                intf['port_id'])['port']['status'] == 'ACTIVE'
+
+        utils.wait_until_true(_status_active, exception=AssertionError)
 
     @decorators.idempotent_id('c86ac3a8-50bd-4b00-a6b8-62af84a0765c')
     @tutils.requires_ext(extension='extraroute', service='network')
diff --git a/neutron_tempest_plugin/common/utils.py b/neutron_tempest_plugin/common/utils.py
index d6d0aee..c42d984 100644
--- a/neutron_tempest_plugin/common/utils.py
+++ b/neutron_tempest_plugin/common/utils.py
@@ -18,11 +18,12 @@
 
 """Utilities and helper functions."""
 
-import eventlet
 import functools
 import threading
 import time
 
+import eventlet
+
 
 class classproperty(object):
     def __init__(self, f):
diff --git a/neutron_tempest_plugin/scenario/test_floatingip.py b/neutron_tempest_plugin/scenario/test_floatingip.py
index 251f21c..8062a46 100644
--- a/neutron_tempest_plugin/scenario/test_floatingip.py
+++ b/neutron_tempest_plugin/scenario/test_floatingip.py
@@ -68,8 +68,8 @@
                 network_id=CONF.network.public_network_id)
 
             for subnet in subnets['subnets']:
-                if (subnet['gateway_ip']
-                    and subnet['ip_version'] == lib_constants.IP_VERSION_4):
+                if (subnet['gateway_ip'] and
+                    subnet['ip_version'] == lib_constants.IP_VERSION_4):
                     return subnet['gateway_ip']
 
     @classmethod
diff --git a/neutron_tempest_plugin/scenario/test_mtu.py b/neutron_tempest_plugin/scenario/test_mtu.py
index 8f1c9ed..b38d770 100644
--- a/neutron_tempest_plugin/scenario/test_mtu.py
+++ b/neutron_tempest_plugin/scenario/test_mtu.py
@@ -69,8 +69,8 @@
     def skip_checks(cls):
         super(NetworkMtuTest, cls).skip_checks()
         if ("vxlan" not in
-                config.CONF.neutron_plugin_options.available_type_drivers
-            or "gre" not in
+                config.CONF.neutron_plugin_options.available_type_drivers or
+            "gre" not in
                 config.CONF.neutron_plugin_options.available_type_drivers):
             raise cls.skipException("GRE or VXLAN type_driver is not enabled")
 
diff --git a/neutron_tempest_plugin/scenario/test_qos.py b/neutron_tempest_plugin/scenario/test_qos.py
index 58accb0..0611160 100644
--- a/neutron_tempest_plugin/scenario/test_qos.py
+++ b/neutron_tempest_plugin/scenario/test_qos.py
@@ -75,8 +75,8 @@
     BS = 512
     COUNT = BUFFER_SIZE / BS
     FILE_SIZE = BS * COUNT
-    LIMIT_BYTES_SEC = (constants.LIMIT_KILO_BITS_PER_SECOND * 1024
-                       * TOLERANCE_FACTOR / 8.0)
+    LIMIT_BYTES_SEC = (constants.LIMIT_KILO_BITS_PER_SECOND * 1024 *
+                       TOLERANCE_FACTOR / 8.0)
     FILE_PATH = "/tmp/img"
 
     NC_PORT = 1234