diff --git a/tempest/api/compute/servers/test_device_tagging.py b/tempest/api/compute/servers/test_device_tagging.py
index 43046ca..b0d527c 100644
--- a/tempest/api/compute/servers/test_device_tagging.py
+++ b/tempest/api/compute/servers/test_device_tagging.py
@@ -47,8 +47,8 @@
             raise cls.skipException('Neutron is required')
         if not CONF.validation.run_validation:
             raise cls.skipException('Validation must be enabled')
-        if (not CONF.compute_feature_enabled.config_drive
-            and not CONF.compute_feature_enabled.metadata_service):
+        if (not CONF.compute_feature_enabled.config_drive and
+                not CONF.compute_feature_enabled.metadata_service):
             raise cls.skipException('One of metadata or config drive must be '
                                     'enabled')
 
diff --git a/tempest/api/image/v1/test_images.py b/tempest/api/image/v1/test_images.py
index 76723f4..2432c8b 100644
--- a/tempest/api/image/v1/test_images.py
+++ b/tempest/api/image/v1/test_images.py
@@ -132,8 +132,8 @@
     @classmethod
     def skip_checks(cls):
         super(ListImagesTest, cls).skip_checks()
-        if (len(CONF.image.container_formats) < 2
-           or len(CONF.image.disk_formats) < 2):
+        if (len(CONF.image.container_formats) < 2 or
+                len(CONF.image.disk_formats) < 2):
             skip_msg = ("%s skipped as multiple container formats "
                         "or disk formats are not available." % cls.__name__)
             raise cls.skipException(skip_msg)
@@ -227,8 +227,8 @@
             self.assertEqual(image['disk_format'], self.disk_format_alt)
         result_set = set(map(lambda x: x['id'], images_list))
         self.assertTrue(self.same_disk_format_set <= result_set)
-        self.assertFalse(self.created_set - self.same_disk_format_set
-                         <= result_set)
+        self.assertFalse(self.created_set - self.same_disk_format_set <=
+                         result_set)
 
     @decorators.idempotent_id('2143655d-96d9-4bec-9188-8674206b4b3b')
     def test_index_container_format(self):
@@ -238,8 +238,8 @@
             self.assertEqual(image['container_format'], self.container_format)
         result_set = set(map(lambda x: x['id'], images_list))
         self.assertTrue(self.same_container_format_set <= result_set)
-        self.assertFalse(self.created_set - self.same_container_format_set
-                         <= result_set)
+        self.assertFalse(self.created_set - self.same_container_format_set <=
+                         result_set)
 
     @decorators.idempotent_id('feb32ac6-22bb-4a16-afd8-9454bb714b14')
     def test_index_max_size(self):
diff --git a/tempest/api/volume/admin/test_volume_hosts.py b/tempest/api/volume/admin/test_volume_hosts.py
index ce0cbd2..7e53ce8 100644
--- a/tempest/api/volume/admin/test_volume_hosts.py
+++ b/tempest/api/volume/admin/test_volume_hosts.py
@@ -46,8 +46,8 @@
         # show host API should fail (return code: 404). The cinder-volume host
         # is presented in format: <host-name>@driver-name.
         c_vol_hosts = [host['host_name'] for host in hosts
-                       if (host['service'] == 'cinder-volume'
-                           and host['service-state'] == 'enabled')]
+                       if (host['service'] == 'cinder-volume' and
+                           host['service-state'] == 'enabled')]
         self.assertNotEmpty(c_vol_hosts,
                             "No available cinder-volume host is found, "
                             "all hosts that found are: %s" % hosts)
diff --git a/tempest/cmd/cleanup_service.py b/tempest/cmd/cleanup_service.py
index 025959a..27e1bc1 100644
--- a/tempest/cmd/cleanup_service.py
+++ b/tempest/cmd/cleanup_service.py
@@ -104,11 +104,11 @@
             self.tenant_filter['tenant_id'] = self.tenant_id
 
     def _filter_by_tenant_id(self, item_list):
-        if (item_list is None
-                or not item_list
-                or not hasattr(self, 'tenant_id')
-                or self.tenant_id is None
-                or 'tenant_id' not in item_list[0]):
+        if (item_list is None or
+                not item_list or
+                not hasattr(self, 'tenant_id') or
+                self.tenant_id is None or
+                'tenant_id' not in item_list[0]):
             return item_list
 
         return [item for item in item_list
@@ -816,8 +816,8 @@
             if not self.is_save_state:
                 roles = [role for role in roles if
                          (role['id'] not in
-                          self.saved_state_json['roles'].keys()
-                          and role['name'] != CONF.identity.admin_role)]
+                          self.saved_state_json['roles'].keys() and
+                          role['name'] != CONF.identity.admin_role)]
                 LOG.debug("List count, %s Roles after reconcile", len(roles))
             return roles
         except Exception:
@@ -852,13 +852,16 @@
     def list(self):
         projects = self.client.list_projects()['projects']
         if not self.is_save_state:
-            projects = [project for project in projects if (project['id']
-                        not in self.saved_state_json['projects'].keys()
-                        and project['name'] != CONF.auth.admin_project_name)]
+            project_ids = self.saved_state_json['projects']
+            projects = [project
+                        for project in projects
+                        if (project['id'] not in project_ids and
+                            project['name'] != CONF.auth.admin_project_name)]
 
         if self.is_preserve:
-            projects = [project for project in projects if project['name']
-                        not in CONF_PROJECTS]
+            projects = [project
+                        for project in projects
+                        if project['name'] not in CONF_PROJECTS]
 
         LOG.debug("List count, %s Projects after reconcile", len(projects))
         return projects
diff --git a/tempest/hacking/checks.py b/tempest/hacking/checks.py
index aae685c..b6e7f8c 100644
--- a/tempest/hacking/checks.py
+++ b/tempest/hacking/checks.py
@@ -228,12 +228,12 @@
     if 'tempest/lib/' not in filename:
         return
 
-    if not ('from tempest' in logical_line
-            or 'import tempest' in logical_line):
+    if not ('from tempest' in logical_line or
+            'import tempest' in logical_line):
         return
 
-    if ('from tempest.lib' in logical_line
-        or 'import tempest.lib' in logical_line):
+    if ('from tempest.lib' in logical_line or
+            'import tempest.lib' in logical_line):
         return
 
     msg = ("T112: tempest.lib should not import local tempest code to avoid "
@@ -266,9 +266,9 @@
     if 'tempest/lib/' not in filename:
         return
 
-    if ('tempest.config' in logical_line
-        or 'from tempest import config' in logical_line
-        or 'oslo_config' in logical_line):
+    if ('tempest.config' in logical_line or
+            'from tempest import config' in logical_line or
+            'oslo_config' in logical_line):
         msg = ('T114: tempest.lib can not have any dependency on tempest '
                'config.')
         yield(0, msg)
diff --git a/tempest/lib/base.py b/tempest/lib/base.py
index 33a32ee..3be55c0 100644
--- a/tempest/lib/base.py
+++ b/tempest/lib/base.py
@@ -43,8 +43,7 @@
         super(BaseTestCase, self).setUp()
         if not self.setUpClassCalled:
             raise RuntimeError("setUpClass does not calls the super's "
-                               "setUpClass in the "
-                               + self.__class__.__name__)
+                               "setUpClass in {!r}".format(type(self)))
         test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)
         try:
             test_timeout = int(test_timeout)
@@ -62,7 +61,7 @@
             stderr = self.useFixture(fixtures.StringStream('stderr')).stream
             self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
         if (os.environ.get('OS_LOG_CAPTURE') != 'False' and
-            os.environ.get('OS_LOG_CAPTURE') != '0'):
+                os.environ.get('OS_LOG_CAPTURE') != '0'):
             self.useFixture(fixtures.LoggerFixture(nuke_handlers=False,
                                                    format=self.log_format,
                                                    level=None))
diff --git a/tempest/lib/cli/output_parser.py b/tempest/lib/cli/output_parser.py
index 2edd5c1..a7d5e49 100644
--- a/tempest/lib/cli/output_parser.py
+++ b/tempest/lib/cli/output_parser.py
@@ -37,8 +37,8 @@
     items = []
     tables_ = tables(output_lines)
     for table_ in tables_:
-        if ('Property' not in table_['headers']
-            or 'Value' not in table_['headers']):
+        if ('Property' not in table_['headers'] or
+                'Value' not in table_['headers']):
             raise exceptions.InvalidStructure()
         item = {}
         for value in table_['values']:
diff --git a/tempest/lib/cmd/check_uuid.py b/tempest/lib/cmd/check_uuid.py
index 101d692..d1f0888 100755
--- a/tempest/lib/cmd/check_uuid.py
+++ b/tempest/lib/cmd/check_uuid.py
@@ -103,7 +103,7 @@
     def _modules_search(self):
         """Recursive search for python modules in base package"""
         modules = []
-        for root, dirs, files in os.walk(self.base_path):
+        for root, _, files in os.walk(self.base_path):
             if not os.path.exists(os.path.join(root, '__init__.py')):
                 continue
             root_package = self._path_to_package(root)
@@ -121,10 +121,10 @@
         idempotent_id = None
         for decorator in test_node.decorator_list:
             if (hasattr(decorator, 'func') and
-                hasattr(decorator.func, 'attr') and
-                decorator.func.attr == DECORATOR_NAME and
-                hasattr(decorator.func, 'value') and
-                decorator.func.value.id == DECORATOR_MODULE):
+                    hasattr(decorator.func, 'attr') and
+                    decorator.func.attr == DECORATOR_NAME and
+                    hasattr(decorator.func, 'value') and
+                    decorator.func.value.id == DECORATOR_MODULE):
                 for arg in decorator.args:
                     idempotent_id = ast.literal_eval(arg)
         return idempotent_id
@@ -165,8 +165,8 @@
 
     @staticmethod
     def _is_test_method(node):
-        return (node.__class__ is ast.FunctionDef
-                and node.name.startswith('test_'))
+        return (node.__class__ is ast.FunctionDef and
+                node.name.startswith('test_'))
 
     @staticmethod
     def _next_node(body, node):
diff --git a/tempest/lib/common/dynamic_creds.py b/tempest/lib/common/dynamic_creds.py
index 4f1a883..f27e926 100644
--- a/tempest/lib/common/dynamic_creds.py
+++ b/tempest/lib/common/dynamic_creds.py
@@ -338,15 +338,15 @@
                 credentials = self._create_creds(roles=credential_type)
             self._creds[str(credential_type)] = credentials
             # Maintained until tests are ported
-            LOG.info("Acquired dynamic creds:\n credentials: %s", credentials)
-            if (self.neutron_available and
-                self.create_networks):
+            LOG.info("Acquired dynamic creds:\n"
+                     " credentials: %s", credentials)
+            if (self.neutron_available and self.create_networks):
                 network, subnet, router = self._create_network_resources(
                     credentials.tenant_id)
                 credentials.set_resources(network=network, subnet=subnet,
                                           router=router)
-                LOG.info("Created isolated network resources for : \n"
-                         + " credentials: %s", credentials)
+                LOG.info("Created isolated network resources for:\n"
+                         " credentials: %s", credentials)
         return credentials
 
     def get_primary_creds(self):
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index c78646f..cf53b67 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -662,8 +662,8 @@
                 addresses = (server['addresses'][network['name']]
                              if network else [])
             for address in addresses:
-                if (address['version'] == CONF.validation.ip_version_for_ssh
-                        and address['OS-EXT-IPS:type'] == 'fixed'):
+                if (address['version'] == CONF.validation.ip_version_for_ssh and  # noqa
+                        address['OS-EXT-IPS:type'] == 'fixed'):
                     return address['addr']
             raise exceptions.ServerUnreachable(server_id=server['id'])
         else:
@@ -792,8 +792,8 @@
         port_map = [(p["id"], fxip["ip_address"])
                     for p in ports
                     for fxip in p["fixed_ips"]
-                    if netutils.is_valid_ipv4(fxip["ip_address"])
-                    and p['status'] in p_status]
+                    if (netutils.is_valid_ipv4(fxip["ip_address"]) and
+                        p['status'] in p_status)]
         inactive = [p for p in ports if p['status'] != 'ACTIVE']
         if inactive:
             LOG.warning("Instance has ports that are not ACTIVE: %s", inactive)
diff --git a/tempest/scenario/test_network_advanced_server_ops.py b/tempest/scenario/test_network_advanced_server_ops.py
index e4ab11c..87ce951 100644
--- a/tempest/scenario/test_network_advanced_server_ops.py
+++ b/tempest/scenario/test_network_advanced_server_ops.py
@@ -43,8 +43,8 @@
     @classmethod
     def skip_checks(cls):
         super(TestNetworkAdvancedServerOps, cls).skip_checks()
-        if not (CONF.network.project_networks_reachable
-                or CONF.network.public_network_id):
+        if not (CONF.network.project_networks_reachable or
+                CONF.network.public_network_id):
             msg = ('Either project_networks_reachable must be "true", or '
                    'public_network_id must be defined.')
             raise cls.skipException(msg)
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index fd9c985..bcd4ddb 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -81,8 +81,8 @@
     @classmethod
     def skip_checks(cls):
         super(TestNetworkBasicOps, cls).skip_checks()
-        if not (CONF.network.project_networks_reachable
-                or CONF.network.public_network_id):
+        if not (CONF.network.project_networks_reachable or
+                CONF.network.public_network_id):
             msg = ('Either project_networks_reachable must be "true", or '
                    'public_network_id must be defined.')
             raise cls.skipException(msg)
diff --git a/tempest/scenario/test_network_v6.py b/tempest/scenario/test_network_v6.py
index 9f4e62b..e4e39c3 100644
--- a/tempest/scenario/test_network_v6.py
+++ b/tempest/scenario/test_network_v6.py
@@ -38,11 +38,11 @@
     @classmethod
     def skip_checks(cls):
         super(TestGettingAddress, cls).skip_checks()
-        if not (CONF.network_feature_enabled.ipv6
-                and CONF.network_feature_enabled.ipv6_subnet_attributes):
+        if not (CONF.network_feature_enabled.ipv6 and
+                CONF.network_feature_enabled.ipv6_subnet_attributes):
             raise cls.skipException('IPv6 or its attributes not supported')
-        if not (CONF.network.project_networks_reachable
-                or CONF.network.public_network_id):
+        if not (CONF.network.project_networks_reachable or
+                CONF.network.public_network_id):
             msg = ('Either project_networks_reachable must be "true", or '
                    'public_network_id must be defined.')
             raise cls.skipException(msg)
diff --git a/tempest/test.py b/tempest/test.py
index 27e0165..f2babbb 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -68,9 +68,9 @@
 def validate_tearDownClass():
     if at_exit_set:
         LOG.error(
-            "tearDownClass does not call the super's "
-            "tearDownClass in these classes: \n"
-            + str(at_exit_set))
+            "tearDownClass does not call the super's tearDownClass in "
+            "these classes:\n"
+            "  %s", at_exit_set)
 
 
 atexit.register(validate_tearDownClass)
@@ -582,8 +582,8 @@
         super(BaseTestCase, self).setUp()
         if not self.__setupclass_called:
             raise RuntimeError("setUpClass does not calls the super's"
-                               "setUpClass in the "
-                               + self.__class__.__name__)
+                               "setUpClass in the " +
+                               self.__class__.__name__)
         at_exit_set.add(self.__class__)
         test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)
         try:
@@ -602,7 +602,7 @@
             stderr = self.useFixture(fixtures.StringStream('stderr')).stream
             self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
         if (os.environ.get('OS_LOG_CAPTURE') != 'False' and
-            os.environ.get('OS_LOG_CAPTURE') != '0'):
+                os.environ.get('OS_LOG_CAPTURE') != '0'):
             self.useFixture(fixtures.LoggerFixture(nuke_handlers=False,
                                                    format=self.log_format,
                                                    level=None))