diff --git a/requirements.txt b/requirements.txt
index 26e1f02..9f57ee1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@
 netaddr!=0.7.16,>=0.7.13 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 oslo.concurrency>=3.8.0 # Apache-2.0
-oslo.config>=3.22.0 # Apache-2.0
+oslo.config>=4.0.0 # Apache-2.0
 oslo.log>=3.22.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0
diff --git a/tempest/api/compute/admin/test_agents.py b/tempest/api/compute/admin/test_agents.py
index 31976ec..69cbfb5 100644
--- a/tempest/api/compute/admin/test_agents.py
+++ b/tempest/api/compute/admin/test_agents.py
@@ -86,8 +86,7 @@
         body = self.client.create_agent(**self.params_agent)['agent']
         self.addCleanup(self.client.delete_agent, body['agent_id'])
         agents = self.client.list_agents()['agents']
-        self.assertGreater(len(agents), 0,
-                           'Cannot get any agents.(%s)' % agents)
+        self.assertNotEmpty(agents, 'Cannot get any agents.(%s)' % agents)
         self.assertIn(body['agent_id'], map(lambda x: x['agent_id'], agents))
 
     @decorators.idempotent_id('eabadde4-3cd7-4ec4-a4b5-5a936d2d4408')
@@ -105,8 +104,7 @@
         agent_id_xen = agent_xen['agent_id']
         agents = (self.client.list_agents(hypervisor=agent_xen['hypervisor'])
                   ['agents'])
-        self.assertGreater(len(agents), 0,
-                           'Cannot get any agents.(%s)' % agents)
+        self.assertNotEmpty(agents, 'Cannot get any agents.(%s)' % agents)
         self.assertIn(agent_id_xen, map(lambda x: x['agent_id'], agents))
         self.assertNotIn(body['agent_id'], map(lambda x: x['agent_id'],
                                                agents))
diff --git a/tempest/api/compute/admin/test_availability_zone.py b/tempest/api/compute/admin/test_availability_zone.py
index 50dec28..bbd39b6 100644
--- a/tempest/api/compute/admin/test_availability_zone.py
+++ b/tempest/api/compute/admin/test_availability_zone.py
@@ -29,10 +29,10 @@
     def test_get_availability_zone_list(self):
         # List of availability zone
         availability_zone = self.client.list_availability_zones()
-        self.assertGreater(len(availability_zone['availabilityZoneInfo']), 0)
+        self.assertNotEmpty(availability_zone['availabilityZoneInfo'])
 
     @decorators.idempotent_id('ef726c58-530f-44c2-968c-c7bed22d5b8c')
     def test_get_availability_zone_list_detail(self):
         # List of availability zones and available services
         availability_zone = self.client.list_availability_zones(detail=True)
-        self.assertGreater(len(availability_zone['availabilityZoneInfo']), 0)
+        self.assertNotEmpty(availability_zone['availabilityZoneInfo'])
diff --git a/tempest/api/compute/admin/test_floating_ips_bulk.py b/tempest/api/compute/admin/test_floating_ips_bulk.py
index 056b4bd..496f119 100644
--- a/tempest/api/compute/admin/test_floating_ips_bulk.py
+++ b/tempest/api/compute/admin/test_floating_ips_bulk.py
@@ -73,7 +73,7 @@
                         self.client.delete_floating_ips_bulk, self.ip_range)
         self.assertEqual(self.ip_range, body['ip_range'])
         ips_list = self.client.list_floating_ips_bulk()['floating_ip_info']
-        self.assertNotEqual(0, len(ips_list))
+        self.assertNotEmpty(ips_list)
         for ip in netaddr.IPNetwork(self.ip_range).iter_hosts():
             self.assertIn(str(ip), map(lambda x: x['address'], ips_list))
         body = (self.client.delete_floating_ips_bulk(self.ip_range)
diff --git a/tempest/api/compute/admin/test_hosts.py b/tempest/api/compute/admin/test_hosts.py
index 8e2f6ed..5b3bb2c 100644
--- a/tempest/api/compute/admin/test_hosts.py
+++ b/tempest/api/compute/admin/test_hosts.py
@@ -44,14 +44,14 @@
         # If send the request with a blank zone, the request will be successful
         # and it will return all the hosts list
         hosts = self.client.list_hosts(zone='')['hosts']
-        self.assertNotEqual(0, len(hosts))
+        self.assertNotEmpty(hosts)
 
     @decorators.idempotent_id('c6ddbadb-c94e-4500-b12f-8ffc43843ff8')
     def test_list_hosts_with_nonexistent_zone(self):
         # If send the request with a nonexistent zone, the request will be
         # successful and no hosts will be returned
         hosts = self.client.list_hosts(zone='xxx')['hosts']
-        self.assertEqual(0, len(hosts))
+        self.assertEmpty(hosts)
 
     @decorators.idempotent_id('38adbb12-aee2-4498-8aec-329c72423aa4')
     def test_show_host_detail(self):
diff --git a/tempest/api/compute/admin/test_hypervisor.py b/tempest/api/compute/admin/test_hypervisor.py
index 4544267..0db802c 100644
--- a/tempest/api/compute/admin/test_hypervisor.py
+++ b/tempest/api/compute/admin/test_hypervisor.py
@@ -31,7 +31,7 @@
         return hypers
 
     def assertHypervisors(self, hypers):
-        self.assertGreater(len(hypers), 0, "No hypervisors found: %s" % hypers)
+        self.assertNotEmpty(hypers, "No hypervisors found: %s" % hypers)
 
     @decorators.idempotent_id('7f0ceacd-c64d-4e96-b8ee-d02943142cc5')
     def test_get_hypervisor_list(self):
@@ -52,7 +52,7 @@
         self.assertHypervisors(hypers)
 
         details = self.client.show_hypervisor(hypers[0]['id'])['hypervisor']
-        self.assertGreater(len(details), 0)
+        self.assertNotEmpty(details)
         self.assertEqual(details['hypervisor_hostname'],
                          hypers[0]['hypervisor_hostname'])
 
@@ -65,14 +65,14 @@
         hostname = hypers[0]['hypervisor_hostname']
         hypervisors = (self.client.list_servers_on_hypervisor(hostname)
                        ['hypervisors'])
-        self.assertGreater(len(hypervisors), 0)
+        self.assertNotEmpty(hypervisors)
 
     @decorators.idempotent_id('797e4f28-b6e0-454d-a548-80cc77c00816')
     def test_get_hypervisor_stats(self):
         # Verify the stats of the all hypervisor
         stats = (self.client.show_hypervisor_statistics()
                  ['hypervisor_statistics'])
-        self.assertGreater(len(stats), 0)
+        self.assertNotEmpty(stats)
 
     @decorators.idempotent_id('91a50d7d-1c2b-4f24-b55a-a1fe20efca70')
     def test_get_hypervisor_uptime(self):
diff --git a/tempest/api/compute/admin/test_hypervisor_negative.py b/tempest/api/compute/admin/test_hypervisor_negative.py
index af87287..431e823 100644
--- a/tempest/api/compute/admin/test_hypervisor_negative.py
+++ b/tempest/api/compute/admin/test_hypervisor_negative.py
@@ -47,7 +47,7 @@
     @decorators.idempotent_id('51e663d0-6b89-4817-a465-20aca0667d03')
     def test_show_hypervisor_with_non_admin_user(self):
         hypers = self._list_hypervisors()
-        self.assertGreater(len(hypers), 0)
+        self.assertNotEmpty(hypers)
 
         self.assertRaises(
             lib_exc.Forbidden,
@@ -58,7 +58,7 @@
     @decorators.idempotent_id('2a0a3938-832e-4859-95bf-1c57c236b924')
     def test_show_servers_with_non_admin_user(self):
         hypers = self._list_hypervisors()
-        self.assertGreater(len(hypers), 0)
+        self.assertNotEmpty(hypers)
 
         self.assertRaises(
             lib_exc.Forbidden,
@@ -96,7 +96,7 @@
     @decorators.idempotent_id('6c3461f9-c04c-4e2a-bebb-71dc9cb47df2')
     def test_get_hypervisor_uptime_with_non_admin_user(self):
         hypers = self._list_hypervisors()
-        self.assertGreater(len(hypers), 0)
+        self.assertNotEmpty(hypers)
 
         self.assertRaises(
             lib_exc.Forbidden,
@@ -131,7 +131,7 @@
     @decorators.idempotent_id('5b6a6c79-5dc1-4fa5-9c58-9c8085948e74')
     def test_search_hypervisor_with_non_admin_user(self):
         hypers = self._list_hypervisors()
-        self.assertGreater(len(hypers), 0)
+        self.assertNotEmpty(hypers)
 
         self.assertRaises(
             lib_exc.Forbidden,
diff --git a/tempest/api/compute/admin/test_security_group_default_rules.py b/tempest/api/compute/admin/test_security_group_default_rules.py
index 6c7cde2..f2f3b57 100644
--- a/tempest/api/compute/admin/test_security_group_default_rules.py
+++ b/tempest/api/compute/admin/test_security_group_default_rules.py
@@ -111,7 +111,7 @@
                         rule['id'])
         rules = (self.adm_client.list_security_group_default_rules()
                  ['security_group_default_rules'])
-        self.assertNotEqual(0, len(rules))
+        self.assertNotEmpty(rules)
         self.assertIn(rule, rules)
 
     @decorators.idempotent_id('15cbb349-86b4-4f71-a048-04b7ef3f150b')
diff --git a/tempest/api/compute/admin/test_services.py b/tempest/api/compute/admin/test_services.py
index 1dfc13e..f3eb597 100644
--- a/tempest/api/compute/admin/test_services.py
+++ b/tempest/api/compute/admin/test_services.py
@@ -29,13 +29,13 @@
     @decorators.idempotent_id('5be41ef4-53d1-41cc-8839-5c2a48a1b283')
     def test_list_services(self):
         services = self.client.list_services()['services']
-        self.assertNotEqual(0, len(services))
+        self.assertNotEmpty(services)
 
     @decorators.idempotent_id('f345b1ec-bc6e-4c38-a527-3ca2bc00bef5')
     def test_get_service_by_service_binary_name(self):
         binary_name = 'nova-compute'
         services = self.client.list_services(binary=binary_name)['services']
-        self.assertNotEqual(0, len(services))
+        self.assertNotEmpty(services)
         for service in services:
             self.assertEqual(binary_name, service['binary'])
 
diff --git a/tempest/api/compute/admin/test_services_negative.py b/tempest/api/compute/admin/test_services_negative.py
index 38bb5ec..201670a 100644
--- a/tempest/api/compute/admin/test_services_negative.py
+++ b/tempest/api/compute/admin/test_services_negative.py
@@ -48,7 +48,7 @@
         host_name = services[0]['host']
         services = self.client.list_services(host=host_name,
                                              binary='xxx')['services']
-        self.assertEqual(0, len(services))
+        self.assertEmpty(services)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('64e7e7fb-69e8-4cb6-a71d-8d5eb0c98655')
@@ -57,4 +57,4 @@
         binary_name = services[0]['binary']
         services = self.client.list_services(host='xxx',
                                              binary=binary_name)['services']
-        self.assertEqual(0, len(services))
+        self.assertEmpty(services)
diff --git a/tempest/api/compute/floating_ips/test_list_floating_ips.py b/tempest/api/compute/floating_ips/test_list_floating_ips.py
index 74d2dc4..913b992 100644
--- a/tempest/api/compute/floating_ips/test_list_floating_ips.py
+++ b/tempest/api/compute/floating_ips/test_list_floating_ips.py
@@ -58,7 +58,7 @@
         # Positive test:Should return the list of floating IPs
         body = self.client.list_floating_ips()['floating_ips']
         floating_ips = body
-        self.assertNotEqual(0, len(floating_ips),
+        self.assertNotEmpty(floating_ips,
                             "Expected floating IPs. Got zero.")
         for i in range(3):
             self.assertIn(self.floating_ip[i], floating_ips)
@@ -90,5 +90,5 @@
     def test_list_floating_ip_pools(self):
         # Positive test:Should return the list of floating IP Pools
         floating_ip_pools = self.pools_client.list_floating_ip_pools()
-        self.assertNotEqual(0, len(floating_ip_pools['floating_ip_pools']),
+        self.assertNotEmpty(floating_ip_pools['floating_ip_pools'],
                             "Expected floating IP Pools. Got zero.")
diff --git a/tempest/api/compute/limits/test_absolute_limits.py b/tempest/api/compute/limits/test_absolute_limits.py
index 58352bd..0585fec 100644
--- a/tempest/api/compute/limits/test_absolute_limits.py
+++ b/tempest/api/compute/limits/test_absolute_limits.py
@@ -42,6 +42,6 @@
         # check whether all expected elements exist
         missing_elements =\
             [ele for ele in expected_elements if ele not in absolute_limits]
-        self.assertEqual(0, len(missing_elements),
+        self.assertEmpty(missing_elements,
                          "Failed to find element %s in absolute limits list"
                          % ', '.join(ele for ele in missing_elements))
diff --git a/tempest/api/compute/security_groups/test_security_group_rules.py b/tempest/api/compute/security_groups/test_security_group_rules.py
index 3378ef8..b568f7d 100644
--- a/tempest/api/compute/security_groups/test_security_group_rules.py
+++ b/tempest/api/compute/security_groups/test_security_group_rules.py
@@ -186,4 +186,4 @@
         rules = (self.security_groups_client.show_security_group(sg1_id)
                  ['security_group']['rules'])
         # The group1 has no rules because group2 has deleted
-        self.assertEqual(0, len(rules))
+        self.assertEmpty(rules)
diff --git a/tempest/api/compute/servers/test_availability_zone.py b/tempest/api/compute/servers/test_availability_zone.py
index 82e74ed..36828d6 100644
--- a/tempest/api/compute/servers/test_availability_zone.py
+++ b/tempest/api/compute/servers/test_availability_zone.py
@@ -29,4 +29,4 @@
     def test_get_availability_zone_list_with_non_admin_user(self):
         # List of availability zone with non-administrator user
         availability_zone = self.client.list_availability_zones()
-        self.assertGreater(len(availability_zone['availabilityZoneInfo']), 0)
+        self.assertNotEmpty(availability_zone['availabilityZoneInfo'])
diff --git a/tempest/api/compute/servers/test_list_server_filters.py b/tempest/api/compute/servers/test_list_server_filters.py
index 1ad153a..921b7da 100644
--- a/tempest/api/compute/servers/test_list_server_filters.py
+++ b/tempest/api/compute/servers/test_list_server_filters.py
@@ -142,7 +142,7 @@
         # Verify only the expected number of servers are returned
         params = {'limit': 0}
         servers = self.client.list_servers(**params)
-        self.assertEqual(0, len(servers['servers']))
+        self.assertEmpty(servers['servers'])
 
     @decorators.idempotent_id('37791bbd-90c0-4de0-831e-5f38cba9c6b3')
     def test_list_servers_filter_by_exceed_limit(self):
diff --git a/tempest/api/compute/servers/test_list_servers_negative.py b/tempest/api/compute/servers/test_list_servers_negative.py
index 0c40240..6c9b287 100644
--- a/tempest/api/compute/servers/test_list_servers_negative.py
+++ b/tempest/api/compute/servers/test_list_servers_negative.py
@@ -122,7 +122,7 @@
         # Return an empty list when a date in the future is passed
         changes_since = {'changes-since': '2051-01-01T12:34:00Z'}
         body = self.client.list_servers(**changes_since)
-        self.assertEqual(0, len(body['servers']))
+        self.assertEmpty(body['servers'])
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('93055106-2d34-46fe-af68-d9ddbf7ee570')
diff --git a/tempest/api/compute/servers/test_virtual_interfaces.py b/tempest/api/compute/servers/test_virtual_interfaces.py
index 610121b..6b625d9 100644
--- a/tempest/api/compute/servers/test_virtual_interfaces.py
+++ b/tempest/api/compute/servers/test_virtual_interfaces.py
@@ -58,7 +58,7 @@
             output = self.client.list_virtual_interfaces(self.server['id'])
             self.assertIsNotNone(output)
             virt_ifaces = output
-            self.assertNotEqual(0, len(virt_ifaces['virtual_interfaces']),
+            self.assertNotEmpty(virt_ifaces['virtual_interfaces'],
                                 'Expected virtual interfaces, got 0 '
                                 'interfaces.')
             for virt_iface in virt_ifaces['virtual_interfaces']:
diff --git a/tempest/api/identity/admin/v2/test_endpoints.py b/tempest/api/identity/admin/v2/test_endpoints.py
index db32f5a..59fc4d8 100644
--- a/tempest/api/identity/admin/v2/test_endpoints.py
+++ b/tempest/api/identity/admin/v2/test_endpoints.py
@@ -62,7 +62,7 @@
         # Asserting LIST endpoints
         missing_endpoints =\
             [e for e in self.setup_endpoints if e not in fetched_endpoints]
-        self.assertEqual(0, len(missing_endpoints),
+        self.assertEmpty(missing_endpoints,
                          "Failed to find endpoint %s in fetched list" %
                          ', '.join(str(e) for e in missing_endpoints))
 
diff --git a/tempest/api/identity/admin/v2/test_users.py b/tempest/api/identity/admin/v2/test_users.py
index 2711a2d..0d98af5 100644
--- a/tempest/api/identity/admin/v2/test_users.py
+++ b/tempest/api/identity/admin/v2/test_users.py
@@ -141,7 +141,7 @@
         # verifying the user Id in the list
         missing_users =\
             [user for user in user_ids if user not in fetched_user_ids]
-        self.assertEqual(0, len(missing_users),
+        self.assertEmpty(missing_users,
                          "Failed to find user %s in fetched list" %
                          ', '.join(m_user for m_user in missing_users))
 
@@ -169,7 +169,7 @@
         # verifying the user Id in the list
         missing_users = [missing_user for missing_user in user_ids
                          if missing_user not in fetched_user_ids]
-        self.assertEqual(0, len(missing_users),
+        self.assertEmpty(missing_users,
                          "Failed to find user %s in fetched list" %
                          ', '.join(m_user for m_user in missing_users))
 
diff --git a/tempest/api/identity/admin/v3/test_credentials.py b/tempest/api/identity/admin/v3/test_credentials.py
index 75e877a..15b2008 100644
--- a/tempest/api/identity/admin/v3/test_credentials.py
+++ b/tempest/api/identity/admin/v3/test_credentials.py
@@ -107,6 +107,6 @@
             fetched_cred_ids.append(i['id'])
         missing_creds = [c for c in created_cred_ids
                          if c not in fetched_cred_ids]
-        self.assertEqual(0, len(missing_creds),
+        self.assertEmpty(missing_creds,
                          "Failed to find cred %s in fetched list" %
                          ', '.join(m_cred for m_cred in missing_creds))
diff --git a/tempest/api/identity/admin/v3/test_domains.py b/tempest/api/identity/admin/v3/test_domains.py
index cddba53..9fe978c 100644
--- a/tempest/api/identity/admin/v3/test_domains.py
+++ b/tempest/api/identity/admin/v3/test_domains.py
@@ -57,7 +57,7 @@
             fetched_ids.append(d['id'])
         missing_doms = [d for d in self.setup_domains
                         if d['id'] not in fetched_ids]
-        self.assertEqual(0, len(missing_doms))
+        self.assertEmpty(missing_doms)
 
     @decorators.idempotent_id('c6aee07b-4981-440c-bb0b-eb598f58ffe9')
     def test_list_domains_filter_by_name(self):
diff --git a/tempest/api/identity/admin/v3/test_endpoints.py b/tempest/api/identity/admin/v3/test_endpoints.py
index 09f92e2..b1ae2aa 100644
--- a/tempest/api/identity/admin/v3/test_endpoints.py
+++ b/tempest/api/identity/admin/v3/test_endpoints.py
@@ -64,7 +64,7 @@
         # Asserting LIST endpoints
         missing_endpoints =\
             [e for e in self.setup_endpoints if e not in fetched_endpoints]
-        self.assertEqual(0, len(missing_endpoints),
+        self.assertEmpty(missing_endpoints,
                          "Failed to find endpoint %s in fetched list" %
                          ', '.join(str(e) for e in missing_endpoints))
 
diff --git a/tempest/api/identity/admin/v3/test_list_users.py b/tempest/api/identity/admin/v3/test_list_users.py
index bcbf6b6..47a3580 100644
--- a/tempest/api/identity/admin/v3/test_list_users.py
+++ b/tempest/api/identity/admin/v3/test_list_users.py
@@ -93,7 +93,7 @@
         fetched_ids = [u['id'] for u in body]
         missing_users = [u['id'] for u in self.users
                          if u['id'] not in fetched_ids]
-        self.assertEqual(0, len(missing_users),
+        self.assertEmpty(missing_users,
                          "Failed to find user %s in fetched list" %
                          ', '.join(m_user for m_user in missing_users))
 
diff --git a/tempest/api/identity/admin/v3/test_policies.py b/tempest/api/identity/admin/v3/test_policies.py
index 730d469..960e2cb 100644
--- a/tempest/api/identity/admin/v3/test_policies.py
+++ b/tempest/api/identity/admin/v3/test_policies.py
@@ -41,7 +41,7 @@
         for p in body:
             fetched_ids.append(p['id'])
         missing_pols = [p for p in policy_ids if p not in fetched_ids]
-        self.assertEqual(0, len(missing_pols))
+        self.assertEmpty(missing_pols)
 
     @decorators.attr(type='smoke')
     @decorators.idempotent_id('e544703a-2f03-4cf2-9b0f-350782fdb0d3')
diff --git a/tempest/api/identity/admin/v3/test_regions.py b/tempest/api/identity/admin/v3/test_regions.py
index ac550a7..d00e408 100644
--- a/tempest/api/identity/admin/v3/test_regions.py
+++ b/tempest/api/identity/admin/v3/test_regions.py
@@ -98,7 +98,7 @@
         missing_regions =\
             [e for e in self.setup_regions if e not in fetched_regions]
         # Asserting List Regions response
-        self.assertEqual(0, len(missing_regions),
+        self.assertEmpty(missing_regions,
                          "Failed to find region %s in fetched list" %
                          ', '.join(str(e) for e in missing_regions))
 
diff --git a/tempest/api/identity/admin/v3/test_users.py b/tempest/api/identity/admin/v3/test_users.py
index 751962f..409d4f8 100644
--- a/tempest/api/identity/admin/v3/test_users.py
+++ b/tempest/api/identity/admin/v3/test_users.py
@@ -131,7 +131,7 @@
         missing_projects =\
             [p for p in assigned_project_ids
              if p not in fetched_project_ids]
-        self.assertEqual(0, len(missing_projects),
+        self.assertEmpty(missing_projects,
                          "Failed to find project %s in fetched list" %
                          ', '.join(m_project for m_project
                                    in missing_projects))
diff --git a/tempest/api/identity/v3/test_tokens.py b/tempest/api/identity/v3/test_tokens.py
index c9d7a4d..042c821 100644
--- a/tempest/api/identity/v3/test_tokens.py
+++ b/tempest/api/identity/v3/test_tokens.py
@@ -54,15 +54,13 @@
             self.assertEqual(subject_id, user_id)
         else:
             # Expect a user ID, but don't know what it will be.
-            self.assertGreaterEqual(len(subject_id), 0,
-                                    'Expected user ID in token.')
+            self.assertIsNotNone(subject_id, 'Expected user ID in token.')
 
         subject_name = resp['user']['name']
         if username:
             self.assertEqual(subject_name, username)
         else:
             # Expect a user name, but don't know what it will be.
-            self.assertGreaterEqual(len(subject_name), 0,
-                                    'Expected user name in token.')
+            self.assertIsNotNone(subject_name, 'Expected user name in token.')
 
         self.assertEqual(resp['methods'][0], 'password')
diff --git a/tempest/api/image/v1/test_image_members.py b/tempest/api/image/v1/test_image_members.py
index 4902316..bf2e510 100644
--- a/tempest/api/image/v1/test_image_members.py
+++ b/tempest/api/image/v1/test_image_members.py
@@ -54,6 +54,6 @@
                                                      self.alt_tenant_id)
         body = self.image_member_client.list_image_members(image_id)
         members = body['members']
-        self.assertEqual(0, len(members), str(members))
+        self.assertEmpty(members)
         self.assertRaises(
             lib_exc.NotFound, self.alt_img_cli.show_image, image_id)
diff --git a/tempest/api/network/admin/test_metering_extensions.py b/tempest/api/network/admin/test_metering_extensions.py
index 3f94868..2b789e7 100644
--- a/tempest/api/network/admin/test_metering_extensions.py
+++ b/tempest/api/network/admin/test_metering_extensions.py
@@ -89,7 +89,7 @@
         # Verify label filtering
         body = self.admin_metering_labels_client.list_metering_labels(id=33)
         metering_labels = body['metering_labels']
-        self.assertEqual(0, len(metering_labels))
+        self.assertEmpty(metering_labels)
 
     @decorators.idempotent_id('ec8e15ff-95d0-433b-b8a6-b466bddb1e50')
     def test_create_delete_metering_label_with_filters(self):
@@ -126,7 +126,7 @@
         # Verify rule filtering
         body = client.list_metering_label_rules(id=33)
         metering_label_rules = body['metering_label_rules']
-        self.assertEqual(0, len(metering_label_rules))
+        self.assertEmpty(metering_label_rules)
 
     @decorators.idempotent_id('f4d547cd-3aee-408f-bf36-454f8825e045')
     def test_create_delete_metering_label_rule_with_filters(self):
diff --git a/tempest/api/volume/admin/test_volume_pools.py b/tempest/api/volume/admin/test_volume_pools.py
index 60a3bda..d389c26 100644
--- a/tempest/api/volume/admin/test_volume_pools.py
+++ b/tempest/api/volume/admin/test_volume_pools.py
@@ -22,7 +22,7 @@
 
 class VolumePoolsAdminTestsJSON(base.BaseVolumeAdminTest):
     def _assert_pools(self, with_detail=False):
-        cinder_pools = self.admin_volume_client.show_pools(
+        cinder_pools = self.admin_scheduler_stats_client.list_pools(
             detail=with_detail)['pools']
         self.assertIn('name', cinder_pools[0])
         if with_detail:
diff --git a/tempest/api/volume/admin/test_volume_services.py b/tempest/api/volume/admin/test_volume_services.py
index 4aab9c1..293af81 100644
--- a/tempest/api/volume/admin/test_volume_services.py
+++ b/tempest/api/volume/admin/test_volume_services.py
@@ -41,13 +41,13 @@
     def test_list_services(self):
         services = (self.admin_volume_services_client.list_services()
                     ['services'])
-        self.assertNotEqual(0, len(services))
+        self.assertNotEmpty(services)
 
     @decorators.idempotent_id('63a3e1ca-37ee-4983-826d-83276a370d25')
     def test_get_service_by_service_binary_name(self):
         services = (self.admin_volume_services_client.list_services(
             binary=self.binary_name)['services'])
-        self.assertNotEqual(0, len(services))
+        self.assertNotEmpty(services)
         for service in services:
             self.assertEqual(self.binary_name, service['binary'])
 
@@ -76,7 +76,7 @@
         services = (self.admin_volume_services_client.list_services(
             host=hostname, binary='cinder-volume')['services'])
 
-        self.assertNotEqual(0, len(services),
+        self.assertNotEmpty(services,
                             'cinder-volume not found on host %s' % hostname)
         self.assertEqual(hostname, _get_host(services[0]['host']))
         self.assertEqual('cinder-volume', services[0]['binary'])
@@ -87,6 +87,6 @@
         services = (self.admin_volume_services_client.list_services(
             host=self.host_name, binary=self.binary_name))['services']
 
-        self.assertNotEqual(0, len(services))
+        self.assertNotEmpty(services)
         self.assertEqual(self.host_name, _get_host(services[0]['host']))
         self.assertEqual(self.binary_name, services[0]['binary'])
diff --git a/tempest/api/volume/test_availability_zone.py b/tempest/api/volume/test_availability_zone.py
index 666efdf..d0a87db 100644
--- a/tempest/api/volume/test_availability_zone.py
+++ b/tempest/api/volume/test_availability_zone.py
@@ -30,4 +30,4 @@
         # List of availability zone
         availability_zone = (self.client.list_availability_zones()
                              ['availabilityZoneInfo'])
-        self.assertGreater(len(availability_zone), 0)
+        self.assertNotEmpty(availability_zone)
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index fc3bcab..9180088 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -261,7 +261,7 @@
         params = {'name': v_name}
         fetched_volume = self.volumes_client.list_volumes(
             params=params)['volumes']
-        self.assertEqual(0, len(fetched_volume))
+        self.assertEmpty(fetched_volume)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('9ca17820-a0e7-4cbd-a7fa-f4468735e359')
@@ -271,7 +271,7 @@
         fetched_volume = \
             self.volumes_client.list_volumes(
                 detail=True, params=params)['volumes']
-        self.assertEqual(0, len(fetched_volume))
+        self.assertEmpty(fetched_volume)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('143b279b-7522-466b-81be-34a87d564a7c')
@@ -279,7 +279,7 @@
         params = {'status': 'null'}
         fetched_volume = self.volumes_client.list_volumes(
             params=params)['volumes']
-        self.assertEqual(0, len(fetched_volume))
+        self.assertEmpty(fetched_volume)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('ba94b27b-be3f-496c-a00e-0283b373fa75')
@@ -288,7 +288,7 @@
         fetched_volume = \
             self.volumes_client.list_volumes(detail=True,
                                              params=params)['volumes']
-        self.assertEqual(0, len(fetched_volume))
+        self.assertEmpty(fetched_volume)
 
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('5b810c91-0ad1-47ce-aee8-615f789be78f')
diff --git a/tempest/lib/api_schema/response/compute/v2_13/__init__.py b/tempest/lib/api_schema/response/compute/v2_13/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/lib/api_schema/response/compute/v2_13/__init__.py
diff --git a/tempest/lib/api_schema/response/compute/v2_13/servers.py b/tempest/lib/api_schema/response/compute/v2_13/servers.py
new file mode 100644
index 0000000..a90f3e4
--- /dev/null
+++ b/tempest/lib/api_schema/response/compute/v2_13/servers.py
@@ -0,0 +1,34 @@
+# Copyright 2017 NTT Corporation.  All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import copy
+
+from tempest.lib.api_schema.response.compute.v2_1 import servers
+
+
+common_server_group = copy.deepcopy(servers.common_server_group)
+common_server_group['properties']['project_id'] = {'type': 'string'}
+common_server_group['properties']['user_id'] = {'type': 'string'}
+common_server_group['required'].append('project_id')
+common_server_group['required'].append('user_id')
+
+create_show_server_group = copy.deepcopy(servers.create_show_server_group)
+create_show_server_group['response_body']['properties'][
+    'server_group'] = common_server_group
+
+delete_server_group = copy.deepcopy(servers.delete_server_group)
+
+list_server_groups = copy.deepcopy(servers.list_server_groups)
+list_server_groups['response_body']['properties']['server_groups'][
+    'items'] = common_server_group
diff --git a/tempest/lib/services/compute/server_groups_client.py b/tempest/lib/services/compute/server_groups_client.py
index 3a935b4..03cd645 100644
--- a/tempest/lib/services/compute/server_groups_client.py
+++ b/tempest/lib/services/compute/server_groups_client.py
@@ -17,12 +17,17 @@
 from oslo_serialization import jsonutils as json
 
 from tempest.lib.api_schema.response.compute.v2_1 import servers as schema
+from tempest.lib.api_schema.response.compute.v2_13 import servers as schemav213
 from tempest.lib.common import rest_client
 from tempest.lib.services.compute import base_compute_client
 
 
 class ServerGroupsClient(base_compute_client.BaseComputeClient):
 
+    schema_versions_info = [
+        {'min': None, 'max': '2.12', 'schema': schema},
+        {'min': '2.13', 'max': None, 'schema': schemav213}]
+
     def create_server_group(self, **kwargs):
         """Create the server group.
 
@@ -34,12 +39,14 @@
         resp, body = self.post('os-server-groups', post_body)
 
         body = json.loads(body)
+        schema = self.get_schema(self.schema_versions_info)
         self.validate_response(schema.create_show_server_group, resp, body)
         return rest_client.ResponseBody(resp, body)
 
     def delete_server_group(self, server_group_id):
         """Delete the given server-group."""
         resp, body = self.delete("os-server-groups/%s" % server_group_id)
+        schema = self.get_schema(self.schema_versions_info)
         self.validate_response(schema.delete_server_group, resp, body)
         return rest_client.ResponseBody(resp, body)
 
@@ -47,6 +54,7 @@
         """List the server-groups."""
         resp, body = self.get("os-server-groups")
         body = json.loads(body)
+        schema = self.get_schema(self.schema_versions_info)
         self.validate_response(schema.list_server_groups, resp, body)
         return rest_client.ResponseBody(resp, body)
 
@@ -54,5 +62,6 @@
         """Get the details of given server_group."""
         resp, body = self.get("os-server-groups/%s" % server_group_id)
         body = json.loads(body)
+        schema = self.get_schema(self.schema_versions_info)
         self.validate_response(schema.create_show_server_group, resp, body)
         return rest_client.ResponseBody(resp, body)
diff --git a/tempest/lib/services/volume/v2/volumes_client.py b/tempest/lib/services/volume/v2/volumes_client.py
index 8b5c96f..f4e7c6a 100644
--- a/tempest/lib/services/volume/v2/volumes_client.py
+++ b/tempest/lib/services/volume/v2/volumes_client.py
@@ -321,7 +321,7 @@
         self.expected_success(200, resp.status)
         return rest_client.ResponseBody(resp, body)
 
-    @removals.remove(message="use show_pools from tempest.lib.services."
+    @removals.remove(message="use list_pools from tempest.lib.services."
                              "volume.v2.scheduler_stats_client")
     def show_pools(self, detail=False):
         # List all the volumes pools (hosts)
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index a486a29..1ca9365 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -811,7 +811,7 @@
         if inactive:
             LOG.warning("Instance has ports that are not ACTIVE: %s", inactive)
 
-        self.assertNotEqual(0, len(port_map),
+        self.assertNotEmpty(port_map,
                             "No IPv4 addresses found in: %s" % ports)
         self.assertEqual(len(port_map), 1,
                          "Found multiple IPv4 addresses: %s. "
@@ -1029,7 +1029,7 @@
             if sg['tenant_id'] == tenant_id and sg['name'] == 'default'
         ]
         msg = "No default security group for tenant %s." % (tenant_id)
-        self.assertGreater(len(sgs), 0, msg)
+        self.assertNotEmpty(sgs, msg)
         return sgs[0]
 
     def _create_security_group_rule(self, secgroup=None,
diff --git a/tempest/tests/lib/services/compute/test_server_groups_client.py b/tempest/tests/lib/services/compute/test_server_groups_client.py
index 1c535ca..9055a36 100644
--- a/tempest/tests/lib/services/compute/test_server_groups_client.py
+++ b/tempest/tests/lib/services/compute/test_server_groups_client.py
@@ -13,9 +13,10 @@
 #    under the License.
 
 import fixtures
-from tempest.tests.lib import fake_auth_provider
 
+from tempest.lib.services.compute import base_compute_client
 from tempest.lib.services.compute import server_groups_client
+from tempest.tests.lib import fake_auth_provider
 from tempest.tests.lib import fake_http
 from tempest.tests.lib.services import base
 
@@ -36,7 +37,7 @@
             fake_auth, 'compute', 'regionOne')
 
     def _test_create_server_group(self, bytes_body=False):
-        expected = {"server_group": TestServerGroupsClient.server_group}
+        expected = {"server_group": self.server_group}
         self.check_service_client_function(
             self.client.create_server_group,
             'tempest.lib.common.rest_client.RestClient.post', expected,
@@ -56,7 +57,7 @@
         self.client.delete_server_group('fake-group')
 
     def _test_list_server_groups(self, bytes_body=False):
-        expected = {"server_groups": [TestServerGroupsClient.server_group]}
+        expected = {"server_groups": [self.server_group]}
         self.check_service_client_function(
             self.client.list_server_groups,
             'tempest.lib.common.rest_client.RestClient.get',
@@ -69,7 +70,7 @@
         self._test_list_server_groups(bytes_body=True)
 
     def _test_show_server_group(self, bytes_body=False):
-        expected = {"server_group": TestServerGroupsClient.server_group}
+        expected = {"server_group": self.server_group}
         self.check_service_client_function(
             self.client.show_server_group,
             'tempest.lib.common.rest_client.RestClient.get',
@@ -81,3 +82,20 @@
 
     def test_show_server_group_byte_body(self):
         self._test_show_server_group(bytes_body=True)
+
+
+class TestServerGroupsClientMinV213(TestServerGroupsClient):
+
+    server_group = {
+        "id": "5bbcc3c4-1da2-4437-a48a-66f15b1b13f9",
+        "name": "test",
+        "policies": ["anti-affinity"],
+        "members": [],
+        "metadata": {},
+        "project_id": "0beb4bffb7a445eb8eb05fee3ee7660a",
+        "user_id": "86031628064a4f99bb66ec03c507dcd8"}
+
+    def setUp(self):
+        super(TestServerGroupsClientMinV213, self).setUp()
+        self.patchobject(base_compute_client, 'COMPUTE_MICROVERSION',
+                         new='2.13')
diff --git a/test-requirements.txt b/test-requirements.txt
index fbdad44..19b45ea 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 # needed for doc build
 sphinx!=1.6.1,>=1.5.1 # BSD
 oslosphinx>=4.7.0 # Apache-2.0
-reno>=1.8.0 # Apache-2.0
+reno!=2.3.1,>=1.8.0 # Apache-2.0
 mock>=2.0 # BSD
 coverage!=4.4,>=4.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0