diff --git a/tempest/api/compute/servers/test_list_servers_negative.py b/tempest/api/compute/servers/test_list_servers_negative.py
index 18a78f0..f0915de 100644
--- a/tempest/api/compute/servers/test_list_servers_negative.py
+++ b/tempest/api/compute/servers/test_list_servers_negative.py
@@ -80,7 +80,7 @@
     @decorators.idempotent_id('fcdf192d-0f74-4d89-911f-1ec002b822c4')
     def test_list_servers_status_non_existing(self):
         # When invalid status is specified, up to microversion 2.37,
-        # an empty list is returnd, and starting from microversion 2.38,
+        # an empty list is returned, and starting from microversion 2.38,
         # a 400 error is returned in that case.
         if self.is_requested_microversion_compatible('2.37'):
             body = self.client.list_servers(status='non_existing_status')
diff --git a/tempest/api/image/v2/test_images.py b/tempest/api/image/v2/test_images.py
index aa57daf..c938cee 100644
--- a/tempest/api/image/v2/test_images.py
+++ b/tempest/api/image/v2/test_images.py
@@ -185,7 +185,7 @@
                      for disk_fmt in disk_fmts]
 
         for (container_fmt, disk_fmt) in all_pairs[:6]:
-            LOG.debug("Creating an image"
+            LOG.debug("Creating an image "
                       "(Container format: %s, Disk format: %s).",
                       container_fmt, disk_fmt)
             cls._create_standard_image(container_fmt, disk_fmt)
diff --git a/tempest/api/network/admin/test_routers.py b/tempest/api/network/admin/test_routers.py
index a7355f3..6ce86fb 100644
--- a/tempest/api/network/admin/test_routers.py
+++ b/tempest/api/network/admin/test_routers.py
@@ -111,7 +111,8 @@
     def _verify_gateway_port(self, router_id):
         list_body = self.admin_ports_client.list_ports(
             network_id=CONF.network.public_network_id,
-            device_id=router_id)
+            device_id=router_id,
+            device_owner="network:router_gateway")
         self.assertEqual(len(list_body['ports']), 1)
         gw_port = list_body['ports'][0]
         fixed_ips = gw_port['fixed_ips']
diff --git a/tempest/api/network/test_dhcp_ipv6.py b/tempest/api/network/test_dhcp_ipv6.py
index 399954c..3ab2909 100644
--- a/tempest/api/network/test_dhcp_ipv6.py
+++ b/tempest/api/network/test_dhcp_ipv6.py
@@ -167,7 +167,7 @@
         self._clean_network()
         self.assertNotEqual(eui_ip, real_ip,
                             ('Real port IP %s equal to EUI-64 %s when '
-                             'ipv6_ra_mode=Off and ipv6_address_mode=Off,'
+                             'ipv6_ra_mode=Off and ipv6_address_mode=Off, '
                              'but shall be taken from fixed IPs') % (
                                 real_ip, eui_ip))
 
diff --git a/tempest/config.py b/tempest/config.py
index f490e03..716c000 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -101,7 +101,7 @@
                deprecated_group='identity'),
     cfg.StrOpt('admin_domain_name',
                default='Default',
-               help="Admin domain name for authentication (Keystone V3)."
+               help="Admin domain name for authentication (Keystone V3). "
                     "The same domain applies to user and project",
                deprecated_group='identity'),
 ]
@@ -191,7 +191,7 @@
                help="The number of passwords for a user that must be unique "
                     "before an old password can be reused. This only takes "
                     "effect when identity-feature-enabled.security_compliance "
-                    "is set to 'True'."
+                    "is set to 'True'. "
                     "This config option corresponds to keystone.conf: "
                     "security_compliance.unique_last_password_count, whose "
                     "default value is 0 meaning disabling this feature. "
diff --git a/tempest/lib/services/identity/v3/inherited_roles_client.py b/tempest/lib/services/identity/v3/inherited_roles_client.py
index 691c7fd..3949437 100644
--- a/tempest/lib/services/identity/v3/inherited_roles_client.py
+++ b/tempest/lib/services/identity/v3/inherited_roles_client.py
@@ -114,8 +114,7 @@
 
     def check_user_has_flag_on_inherited_to_project(
             self, project_id, user_id, role_id):
-        """Checks whether a user has a role assignment"""
-        """with the inherited_to_projects flag on a project."""
+        """Check if user has an inherited project role on project"""
         resp, body = self.head(
             "OS-INHERIT/projects/%s/users/%s/roles/%s/inherited_to_projects"
             % (project_id, user_id, role_id))
@@ -142,8 +141,7 @@
 
     def check_group_has_flag_on_inherited_to_project(
             self, project_id, group_id, role_id):
-        """Checks whether a group has a role assignment"""
-        """with the inherited_to_projects flag on a project."""
+        """Check if group has an inherited project role on project"""
         resp, body = self.head(
             "OS-INHERIT/projects/%s/groups/%s/roles/%s/inherited_to_projects"
             % (project_id, group_id, role_id))