diff --git a/releasenotes/notes/deprecate-nova-api-extensions-df16b02485dae203.yaml b/releasenotes/notes/deprecate-nova-api-extensions-df16b02485dae203.yaml
new file mode 100644
index 0000000..c2d9a9b
--- /dev/null
+++ b/releasenotes/notes/deprecate-nova-api-extensions-df16b02485dae203.yaml
@@ -0,0 +1,7 @@
+---
+deprecations:
+  - The *api_extensions* config option in the *compute-feature-enabled* group is
+    now deprecated. This option will be removed from tempest when all the
+    OpenStack releases supported by tempest no longer support the API extensions
+    mechanism. This was removed from Nova during the Newton cycle, so this will
+    be removed at the Mitaka EOL.
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 4522a17..140263c 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -275,3 +275,6 @@
 
 # If true, do not generate a @detailmenu in the "Top" node's menu.
 # texinfo_no_detailmenu = False
+
+# -- Options for Internationalization output ------------------------------
+locale_dirs = ['locale/']
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 5738293..222bf18 100644
--- a/tempest/api/compute/floating_ips/test_list_floating_ips.py
+++ b/tempest/api/compute/floating_ips/test_list_floating_ips.py
@@ -41,8 +41,8 @@
 
     @classmethod
     def resource_cleanup(cls):
-        for i in range(3):
-            cls.client.delete_floating_ip(cls.floating_ip_id[i])
+        for f_id in cls.floating_ip_id:
+            cls.client.delete_floating_ip(f_id)
         super(FloatingIPDetailsTestJSON, cls).resource_cleanup()
 
     @test.idempotent_id('16db31c3-fb85-40c9-bbe2-8cf7b67ff99f')
diff --git a/tempest/api/network/admin/test_dhcp_agent_scheduler.py b/tempest/api/network/admin/test_dhcp_agent_scheduler.py
index d2ab237..b3555b6 100644
--- a/tempest/api/network/admin/test_dhcp_agent_scheduler.py
+++ b/tempest/api/network/admin/test_dhcp_agent_scheduler.py
@@ -44,7 +44,7 @@
         body = self.admin_networks_client.list_dhcp_agents_on_hosting_network(
             self.network['id'])
         agents = body['agents']
-        self.assertIsNotNone(agents)
+        self.assertNotEmpty(agents, "no dhcp agent")
         agent = agents[0]
         self.assertTrue(self._check_network_in_dhcp_agent(
             self.network['id'], agent))
diff --git a/tempest/common/waiters.py b/tempest/common/waiters.py
index fa951b5..c1942d6 100644
--- a/tempest/common/waiters.py
+++ b/tempest/common/waiters.py
@@ -221,7 +221,7 @@
         body = client.show_backup(backup_id)['backup']
         backup_status = body['status']
         if backup_status == 'error' and backup_status != status:
-            raise exceptions.VolumeBackupException(backup_id=backup_id)
+            raise lib_exc.VolumeBackupException(backup_id=backup_id)
 
         if int(time.time()) - start >= client.build_timeout:
             message = ('Volume backup %s failed to reach %s status '
diff --git a/tempest/config.py b/tempest/config.py
index 98cfb40..1940393 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -318,7 +318,13 @@
                 help='A list of enabled compute extensions with a special '
                      'entry all which indicates every extension is enabled. '
                      'Each extension should be specified with alias name. '
-                     'Empty list indicates all extensions are disabled'),
+                     'Empty list indicates all extensions are disabled',
+                     deprecated_for_removal=True,
+                     deprecated_reason='The Nova extensions API and mechanism '
+                                       'is deprecated. This option will be '
+                                       'removed when all releases supported '
+                                       'by tempest no longer contain the Nova '
+                                       'extensions API and mechanism.'),
     cfg.BoolOpt('change_password',
                 default=False,
                 help="Does the test environment support changing the admin "