diff --git a/requirements.txt b/requirements.txt
index 9dd57a9..7c426e6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,14 +12,14 @@
 testrepository>=0.0.18 # Apache-2.0/BSD
 pyOpenSSL>=0.14 # Apache-2.0
 oslo.concurrency>=3.5.0 # Apache-2.0
-oslo.config>=3.7.0 # Apache-2.0
+oslo.config>=3.9.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.log>=1.14.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.utils>=3.5.0 # Apache-2.0
 six>=1.9.0 # MIT
 iso8601>=0.1.9 # MIT
-fixtures>=1.3.1 # Apache-2.0/BSD
+fixtures<2.0,>=1.3.1 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 PyYAML>=3.1.0 # MIT
 stevedore>=1.5.0 # Apache-2.0
diff --git a/tempest/api/baremetal/admin/test_nodes.py b/tempest/api/baremetal/admin/test_nodes.py
index 8cc4d05..2c44665 100644
--- a/tempest/api/baremetal/admin/test_nodes.py
+++ b/tempest/api/baremetal/admin/test_nodes.py
@@ -138,14 +138,14 @@
         body = self.client.get_node_boot_device(self.node['uuid'])
         self.assertIn('boot_device', body)
         self.assertIn('persistent', body)
-        self.assertTrue(isinstance(body['boot_device'], six.string_types))
-        self.assertTrue(isinstance(body['persistent'], bool))
+        self.assertIsInstance(body['boot_device'], six.string_types)
+        self.assertIsInstance(body['persistent'], bool)
 
     @test.idempotent_id('3622bc6f-3589-4bc2-89f3-50419c66b133')
     def test_get_node_supported_boot_devices(self):
         body = self.client.get_node_supported_boot_devices(self.node['uuid'])
         self.assertIn('supported_boot_devices', body)
-        self.assertTrue(isinstance(body['supported_boot_devices'], list))
+        self.assertIsInstance(body['supported_boot_devices'], list)
 
     @test.idempotent_id('f63b6288-1137-4426-8cfe-0d5b7eb87c06')
     def test_get_console(self):
diff --git a/tempest/api/compute/servers/test_servers_negative.py b/tempest/api/compute/servers/test_servers_negative.py
index 0df6ead..8f0e430 100644
--- a/tempest/api/compute/servers/test_servers_negative.py
+++ b/tempest/api/compute/servers/test_servers_negative.py
@@ -29,8 +29,6 @@
 
 class ServersNegativeTestJSON(base.BaseV2ComputeTest):
 
-    credentials = ['primary', 'alt']
-
     def setUp(self):
         super(ServersNegativeTestJSON, self).setUp()
         try:
@@ -47,7 +45,6 @@
     def setup_clients(cls):
         super(ServersNegativeTestJSON, cls).setup_clients()
         cls.client = cls.servers_client
-        cls.alt_client = cls.os_alt.servers_client
 
     @classmethod
     def resource_setup(cls):
@@ -271,16 +268,6 @@
                           self.server_id, name=new_name)
 
     @test.attr(type=['negative'])
-    @test.idempotent_id('543d84c1-dd2e-4c6d-8cb2-b9da0efaa384')
-    def test_update_server_of_another_tenant(self):
-        # Update name of a server that belongs to another tenant
-
-        new_name = self.server_id + '_new'
-        self.assertRaises(lib_exc.NotFound,
-                          self.alt_client.update_server, self.server_id,
-                          name=new_name)
-
-    @test.attr(type=['negative'])
     @test.idempotent_id('5c8e244c-dada-4590-9944-749c455b431f')
     def test_update_server_name_length_exceeds_256(self):
         # Update name of server exceed the name length limit
@@ -301,14 +288,6 @@
                           nonexistent_server)
 
     @test.attr(type=['negative'])
-    @test.idempotent_id('5c75009d-3eea-423e-bea3-61b09fd25f9c')
-    def test_delete_a_server_of_another_tenant(self):
-        # Delete a server that belongs to another tenant
-        self.assertRaises(lib_exc.NotFound,
-                          self.alt_client.delete_server,
-                          self.server_id)
-
-    @test.attr(type=['negative'])
     @test.idempotent_id('75f79124-277c-45e6-a373-a1d6803f4cc4')
     def test_delete_server_pass_negative_id(self):
         # Pass an invalid string parameter to delete server
@@ -519,3 +498,45 @@
         self.assertRaises(lib_exc.Conflict,
                           self.client.unshelve_server,
                           self.server_id)
+
+
+class ServersNegativeTestMultiTenantJSON(base.BaseV2ComputeTest):
+
+    credentials = ['primary', 'alt']
+
+    def setUp(self):
+        super(ServersNegativeTestMultiTenantJSON, self).setUp()
+        try:
+            waiters.wait_for_server_status(self.client, self.server_id,
+                                           'ACTIVE')
+        except Exception:
+            self.__class__.server_id = self.rebuild_server(self.server_id)
+
+    @classmethod
+    def setup_clients(cls):
+        super(ServersNegativeTestMultiTenantJSON, cls).setup_clients()
+        cls.alt_client = cls.os_alt.servers_client
+
+    @classmethod
+    def resource_setup(cls):
+        super(ServersNegativeTestMultiTenantJSON, cls).resource_setup()
+        server = cls.create_test_server(wait_until='ACTIVE')
+        cls.server_id = server['id']
+
+    @test.attr(type=['negative'])
+    @test.idempotent_id('543d84c1-dd2e-4c6d-8cb2-b9da0efaa384')
+    def test_update_server_of_another_tenant(self):
+        # Update name of a server that belongs to another tenant
+
+        new_name = self.server_id + '_new'
+        self.assertRaises(lib_exc.NotFound,
+                          self.alt_client.update_server, self.server_id,
+                          name=new_name)
+
+    @test.attr(type=['negative'])
+    @test.idempotent_id('5c75009d-3eea-423e-bea3-61b09fd25f9c')
+    def test_delete_a_server_of_another_tenant(self):
+        # Delete a server that belongs to another tenant
+        self.assertRaises(lib_exc.NotFound,
+                          self.alt_client.delete_server,
+                          self.server_id)
diff --git a/tempest/tests/common/test_dynamic_creds.py b/tempest/tests/common/test_dynamic_creds.py
index 5ef1eb3..a49612d 100644
--- a/tempest/tests/common/test_dynamic_creds.py
+++ b/tempest/tests/common/test_dynamic_creds.py
@@ -58,8 +58,8 @@
 
     def test_tempest_client(self):
         creds = dynamic_creds.DynamicCredentialProvider(**self.fixed_params)
-        self.assertTrue(isinstance(creds.identity_admin_client,
-                                   json_iden_client.IdentityClient))
+        self.assertIsInstance(creds.identity_admin_client,
+                              json_iden_client.IdentityClient)
 
     def _get_fake_admin_creds(self):
         return credentials.get_credentials(
diff --git a/tempest/tests/common/test_preprov_creds.py b/tempest/tests/common/test_preprov_creds.py
index 7188e5f..7af8654 100644
--- a/tempest/tests/common/test_preprov_creds.py
+++ b/tempest/tests/common/test_preprov_creds.py
@@ -325,7 +325,7 @@
                                                     'id': 'fake-id',
                                                     'label': 'network-2'}]}):
             creds = test_accounts_class.get_creds_by_roles(['role-7'])
-        self.assertTrue(isinstance(creds, cred_provider.TestResources))
+        self.assertIsInstance(creds, cred_provider.TestResources)
         network = creds.network
         self.assertIsNotNone(network)
         self.assertIn('name', network)
diff --git a/tempest/tests/test_glance_http.py b/tempest/tests/test_glance_http.py
index 1811141..f6076ca 100644
--- a/tempest/tests/test_glance_http.py
+++ b/tempest/tests/test_glance_http.py
@@ -93,29 +93,29 @@
         self.assertEqual(httplib.HTTPConnection, conn_class)
 
     def test_get_connection_http(self):
-        self.assertTrue(isinstance(self.client._get_connection(),
-                                   httplib.HTTPConnection))
+        self.assertIsInstance(self.client._get_connection(),
+                              httplib.HTTPConnection)
 
     def test_get_connection_https(self):
         endpoint = 'https://fake_url.com'
         self.fake_auth.base_url = mock.MagicMock(return_value=endpoint)
         self.client = glance_http.HTTPClient(self.fake_auth, {})
-        self.assertTrue(isinstance(self.client._get_connection(),
-                                   glance_http.VerifiedHTTPSConnection))
+        self.assertIsInstance(self.client._get_connection(),
+                              glance_http.VerifiedHTTPSConnection)
 
     def test_get_connection_ipv4_https(self):
         endpoint = 'https://127.0.0.1'
         self.fake_auth.base_url = mock.MagicMock(return_value=endpoint)
         self.client = glance_http.HTTPClient(self.fake_auth, {})
-        self.assertTrue(isinstance(self.client._get_connection(),
-                                   glance_http.VerifiedHTTPSConnection))
+        self.assertIsInstance(self.client._get_connection(),
+                              glance_http.VerifiedHTTPSConnection)
 
     def test_get_connection_ipv6_https(self):
         endpoint = 'https://[::1]'
         self.fake_auth.base_url = mock.MagicMock(return_value=endpoint)
         self.client = glance_http.HTTPClient(self.fake_auth, {})
-        self.assertTrue(isinstance(self.client._get_connection(),
-                                   glance_http.VerifiedHTTPSConnection))
+        self.assertIsInstance(self.client._get_connection(),
+                              glance_http.VerifiedHTTPSConnection)
 
     def test_get_connection_url_not_fount(self):
         self.useFixture(mockpatch.PatchObject(self.client, 'connection_class',
diff --git a/test-requirements.txt b/test-requirements.txt
index be3a4f1..bb4b27f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,7 +6,7 @@
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2 # BSD
 python-subunit>=0.0.18 # Apache-2.0/BSD
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
-reno>=0.1.1 # Apache2
+reno>=1.6.2 # Apache2
 mox>=0.5.3 # Apache-2.0
 mock>=1.2 # BSD
 coverage>=3.6 # Apache-2.0