diff --git a/manila/api/openstack/wsgi.py b/manila/api/openstack/wsgi.py
index 24d2a2f77d..c5b9f1837e 100644
--- a/manila/api/openstack/wsgi.py
+++ b/manila/api/openstack/wsgi.py
@@ -22,6 +22,7 @@ from oslo_log import log
 from oslo_serialization import jsonutils
 from oslo_utils import strutils
 import six
+from six.moves import http_client
 import webob
 import webob.exc
 
@@ -1241,7 +1242,7 @@ class AdminActionsMixin(object):
             self._update(context, id, update)
         except exception.NotFound as e:
             raise webob.exc.HTTPNotFound(six.text_type(e))
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @Controller.authorize('force_delete')
     def _force_delete(self, req, id, body):
@@ -1252,7 +1253,7 @@ class AdminActionsMixin(object):
         except exception.NotFound as e:
             raise webob.exc.HTTPNotFound(six.text_type(e))
         self._delete(context, resource, force=True)
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
 
 class Fault(webob.exc.HTTPException):
diff --git a/manila/api/v1/security_service.py b/manila/api/v1/security_service.py
index 03b4d94e28..2ad26cc581 100644
--- a/manila/api/v1/security_service.py
+++ b/manila/api/v1/security_service.py
@@ -16,6 +16,7 @@
 """The security service api."""
 
 from oslo_log import log
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -72,7 +73,7 @@ class SecurityServiceController(wsgi.Controller):
                             'delete', security_service)
         db.security_service_delete(context, id)
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def index(self, req):
         """Returns a summary list of security services."""
diff --git a/manila/api/v1/share_metadata.py b/manila/api/v1/share_metadata.py
index 971c1b2be2..c50b92989f 100644
--- a/manila/api/v1/share_metadata.py
+++ b/manila/api/v1/share_metadata.py
@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -144,7 +145,7 @@ class ShareMetadataController(object):
         except exception.NotFound:
             msg = _('share does not exist')
             raise exc.HTTPNotFound(explanation=msg)
-        return webob.Response(status_int=200)
+        return webob.Response(status_int=http_client.OK)
 
 
 def create_resource():
diff --git a/manila/api/v1/share_servers.py b/manila/api/v1/share_servers.py
index dcec8aeac4..eb0c841038 100644
--- a/manila/api/v1/share_servers.py
+++ b/manila/api/v1/share_servers.py
@@ -15,6 +15,7 @@
 
 from oslo_log import log
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -112,7 +113,7 @@ class ShareServerController(wsgi.Controller):
             self.share_api.delete_share_server(context, share_server)
         except exception.ShareServerInUse as e:
             raise exc.HTTPConflict(explanation=six.text_type(e))
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
 
 def create_resource():
diff --git a/manila/api/v1/share_snapshots.py b/manila/api/v1/share_snapshots.py
index 5df234ed7f..ccf45d4bc7 100644
--- a/manila/api/v1/share_snapshots.py
+++ b/manila/api/v1/share_snapshots.py
@@ -16,6 +16,7 @@
 """The share snapshots api."""
 
 from oslo_log import log
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -68,7 +69,7 @@ class ShareSnapshotMixin(object):
             self.share_api.delete_snapshot(context, snapshot)
         except exception.NotFound:
             raise exc.HTTPNotFound()
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def index(self, req):
         """Returns a summary list of snapshots."""
diff --git a/manila/api/v1/share_types_extra_specs.py b/manila/api/v1/share_types_extra_specs.py
index 9024759323..ea66d1a30b 100644
--- a/manila/api/v1/share_types_extra_specs.py
+++ b/manila/api/v1/share_types_extra_specs.py
@@ -14,6 +14,7 @@
 #    under the License.
 
 import six
+from six.moves import http_client
 import webob
 
 from manila.api import common
@@ -173,7 +174,7 @@ class ShareTypeExtraSpecsController(wsgi.Controller):
         notifier_info = dict(type_id=type_id, id=id)
         notifier = rpc.get_notifier('shareTypeExtraSpecs')
         notifier.info(context, 'share_type_extra_specs.delete', notifier_info)
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _check_key_names(self, keys):
         if not common.validate_key_names(keys):
diff --git a/manila/api/v1/share_unmanage.py b/manila/api/v1/share_unmanage.py
index 1b0622b3f3..e082e56a2c 100644
--- a/manila/api/v1/share_unmanage.py
+++ b/manila/api/v1/share_unmanage.py
@@ -14,6 +14,7 @@
 
 from oslo_log import log
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -64,7 +65,7 @@ class ShareUnmanageMixin(object):
         except (exception.InvalidShare, exception.PolicyNotAuthorized) as e:
             raise exc.HTTPForbidden(explanation=six.text_type(e))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
 
 class ShareUnmanageController(ShareUnmanageMixin, wsgi.Controller):
diff --git a/manila/api/v1/shares.py b/manila/api/v1/shares.py
index 362bc43a3e..b8ef2d2731 100644
--- a/manila/api/v1/shares.py
+++ b/manila/api/v1/shares.py
@@ -21,6 +21,7 @@ from oslo_log import log
 from oslo_utils import strutils
 from oslo_utils import uuidutils
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -97,7 +98,7 @@ class ShareMixin(object):
         except exception.Conflict as e:
             raise exc.HTTPConflict(explanation=six.text_type(e))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def index(self, req):
         """Returns a summary list of shares."""
@@ -440,7 +441,7 @@ class ShareMixin(object):
         except exception.NotFound as error:
             raise webob.exc.HTTPNotFound(explanation=six.text_type(error))
         self.share_api.deny_access(context, share, access)
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _access_list(self, req, id, body):
         """List share access rules."""
@@ -464,7 +465,7 @@ class ShareMixin(object):
         except exception.ShareSizeExceedsAvailableQuota as e:
             raise webob.exc.HTTPForbidden(explanation=six.text_type(e))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _shrink(self, req, id, body):
         """Shrink size of a share."""
@@ -477,7 +478,7 @@ class ShareMixin(object):
         except (exception.InvalidInput, exception.InvalidShare) as e:
             raise webob.exc.HTTPBadRequest(explanation=six.text_type(e))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _get_valid_resize_parameters(self, context, id, body, action):
         try:
diff --git a/manila/api/v2/messages.py b/manila/api/v2/messages.py
index e9e0cae2e1..0158c7656a 100644
--- a/manila/api/v2/messages.py
+++ b/manila/api/v2/messages.py
@@ -18,6 +18,7 @@ GET /messages/<message_id>
 DELETE /messages/<message_id>
 """
 
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -66,7 +67,7 @@ class MessagesController(wsgi.Controller):
         except exception.MessageNotFound as error:
             raise exc.HTTPNotFound(explanation=error.msg)
 
-        return webob.Response(status_int=204)
+        return webob.Response(status_int=http_client.NO_CONTENT)
 
     @wsgi.Controller.api_version(MESSAGES_BASE_MICRO_VERSION)
     @wsgi.Controller.authorize('get_all')
diff --git a/manila/api/v2/quota_sets.py b/manila/api/v2/quota_sets.py
index 61c1e5a468..dcb2e8e265 100644
--- a/manila/api/v2/quota_sets.py
+++ b/manila/api/v2/quota_sets.py
@@ -16,6 +16,7 @@
 
 from oslo_log import log
 from oslo_utils import strutils
+from six.moves import http_client
 from six.moves.urllib import parse
 import webob
 
@@ -257,7 +258,7 @@ class QuotaSetsMixin(object):
                     context, id, share_type_id)
             else:
                 QUOTAS.destroy_all_by_project(context, id)
-            return webob.Response(status_int=202)
+            return webob.Response(status_int=http_client.ACCEPTED)
         except exception.NotAuthorized:
             raise webob.exc.HTTPForbidden()
 
diff --git a/manila/api/v2/share_group_snapshots.py b/manila/api/v2/share_group_snapshots.py
index 7eeb323322..1c64fd2b80 100644
--- a/manila/api/v2/share_group_snapshots.py
+++ b/manila/api/v2/share_group_snapshots.py
@@ -16,6 +16,7 @@
 from oslo_log import log
 from oslo_utils import uuidutils
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -70,7 +71,7 @@ class ShareGroupSnapshotController(wsgi.Controller, wsgi.AdminActionsMixin):
                 context, sg_snapshot)
         except exception.InvalidShareGroupSnapshot as e:
             raise exc.HTTPConflict(explanation=six.text_type(e))
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.api_version('2.31', experimental=True)
     @wsgi.Controller.authorize('get_all')
diff --git a/manila/api/v2/share_group_type_specs.py b/manila/api/v2/share_group_type_specs.py
index 3fec6a02f9..42e31dba45 100644
--- a/manila/api/v2/share_group_type_specs.py
+++ b/manila/api/v2/share_group_type_specs.py
@@ -12,6 +12,7 @@
 
 import copy
 import six
+from six.moves import http_client
 import webob
 
 from manila.api import common
@@ -119,7 +120,7 @@ class ShareGroupTypeSpecsController(wsgi.Controller):
             db.share_group_type_specs_delete(context, id, key)
         except exception.ShareGroupTypeSpecsNotFound as error:
             raise webob.exc.HTTPNotFound(explanation=error.msg)
-        return webob.Response(status_int=204)
+        return webob.Response(status_int=http_client.NO_CONTENT)
 
     def _check_key_names(self, keys):
         if not common.validate_key_names(keys):
diff --git a/manila/api/v2/share_group_types.py b/manila/api/v2/share_group_types.py
index 6171265d39..4376625d7d 100644
--- a/manila/api/v2/share_group_types.py
+++ b/manila/api/v2/share_group_types.py
@@ -15,6 +15,7 @@
 from oslo_utils import strutils
 from oslo_utils import uuidutils
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -166,7 +167,7 @@ class ShareGroupTypesController(wsgi.Controller):
             raise webob.exc.HTTPBadRequest(explanation=msg % id)
         except exception.NotFound:
             raise webob.exc.HTTPNotFound()
-        return webob.Response(status_int=204)
+        return webob.Response(status_int=http_client.NO_CONTENT)
 
     @wsgi.Controller.api_version('2.31', experimental=True)
     @wsgi.Controller.authorize('list_project_access')
@@ -204,7 +205,7 @@ class ShareGroupTypesController(wsgi.Controller):
                 context, id, project)
         except exception.ShareGroupTypeAccessExists as err:
             raise webob.exc.HTTPConflict(explanation=six.text_type(err))
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.api_version('2.31', experimental=True)
     @wsgi.action('removeProjectAccess')
@@ -219,7 +220,7 @@ class ShareGroupTypesController(wsgi.Controller):
                 context, id, project)
         except exception.ShareGroupTypeAccessNotFound as err:
             raise webob.exc.HTTPNotFound(explanation=six.text_type(err))
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _assert_non_public_share_group_type(self, context, type_id):
         try:
diff --git a/manila/api/v2/share_groups.py b/manila/api/v2/share_groups.py
index 396ed9c07d..8aefa59709 100644
--- a/manila/api/v2/share_groups.py
+++ b/manila/api/v2/share_groups.py
@@ -16,6 +16,7 @@
 from oslo_log import log
 from oslo_utils import uuidutils
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -71,7 +72,7 @@ class ShareGroupController(wsgi.Controller, wsgi.AdminActionsMixin):
             self.share_group_api.delete(context, share_group)
         except exception.InvalidShareGroup as e:
             raise exc.HTTPConflict(explanation=six.text_type(e))
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.api_version('2.31', experimental=True)
     @wsgi.Controller.authorize('get_all')
diff --git a/manila/api/v2/share_networks.py b/manila/api/v2/share_networks.py
index 57b30b76e7..be97ccd8bc 100644
--- a/manila/api/v2/share_networks.py
+++ b/manila/api/v2/share_networks.py
@@ -19,6 +19,7 @@ from oslo_db import exception as db_exception
 from oslo_log import log
 from oslo_utils import timeutils
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -104,7 +105,7 @@ class ShareNetworkController(wsgi.Controller):
             QUOTAS.commit(context, reservations,
                           project_id=share_network['project_id'],
                           user_id=share_network['user_id'])
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _get_share_networks(self, req, is_detail=True):
         """Returns a list of share networks."""
diff --git a/manila/api/v2/share_replicas.py b/manila/api/v2/share_replicas.py
index 3cca6cda01..a005be3988 100644
--- a/manila/api/v2/share_replicas.py
+++ b/manila/api/v2/share_replicas.py
@@ -16,6 +16,7 @@
 """The Share Replication API."""
 
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -157,7 +158,7 @@ class ShareReplicationController(wsgi.Controller, wsgi.AdminActionsMixin):
         except exception.ReplicationException as e:
             raise exc.HTTPBadRequest(explanation=six.text_type(e))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.api_version(MIN_SUPPORTED_API_VERSION, experimental=True)
     @wsgi.action('promote')
@@ -176,7 +177,7 @@ class ShareReplicationController(wsgi.Controller, wsgi.AdminActionsMixin):
         replica_state = replica.get('replica_state')
 
         if replica_state == constants.REPLICA_STATE_ACTIVE:
-            return webob.Response(status_int=200)
+            return webob.Response(status_int=http_client.OK)
 
         try:
             replica = self.share_api.promote_share_replica(context, replica)
@@ -222,7 +223,7 @@ class ShareReplicationController(wsgi.Controller, wsgi.AdminActionsMixin):
         replica_state = replica.get('replica_state')
 
         if replica_state == constants.REPLICA_STATE_ACTIVE:
-            return webob.Response(status_int=200)
+            return webob.Response(status_int=http_client.OK)
 
         try:
             self.share_api.update_share_replica(context, replica)
diff --git a/manila/api/v2/share_snapshots.py b/manila/api/v2/share_snapshots.py
index ed18b3eb86..5257707f17 100644
--- a/manila/api/v2/share_snapshots.py
+++ b/manila/api/v2/share_snapshots.py
@@ -18,6 +18,7 @@
 
 from oslo_log import log
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -77,7 +78,7 @@ class ShareSnapshotsController(share_snapshots.ShareSnapshotMixin,
         except (exception.ShareSnapshotNotFound, exception.ShareNotFound) as e:
             raise exc.HTTPNotFound(explanation=six.text_type(e))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.authorize('manage_snapshot')
     def _manage(self, req, body):
@@ -220,7 +221,7 @@ class ShareSnapshotsController(share_snapshots.ShareSnapshotMixin,
             raise webob.exc.HTTPBadRequest(explanation=msg)
 
         self.share_api.snapshot_deny_access(context, snapshot, access)
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _check_mount_snapshot_support(self, context, snapshot):
         share = self.share_api.get(context, snapshot['share_id'])
diff --git a/manila/api/v2/share_types.py b/manila/api/v2/share_types.py
index 9431ca9e54..9f4ac84895 100644
--- a/manila/api/v2/share_types.py
+++ b/manila/api/v2/share_types.py
@@ -19,6 +19,7 @@ from oslo_log import log
 from oslo_utils import strutils
 from oslo_utils import uuidutils
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -250,7 +251,7 @@ class ShareTypesController(wsgi.Controller):
 
             raise webob.exc.HTTPNotFound()
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.authorize('list_project_access')
     def share_type_access(self, req, id):
@@ -289,7 +290,7 @@ class ShareTypesController(wsgi.Controller):
         except exception.ShareTypeAccessExists as err:
             raise webob.exc.HTTPConflict(explanation=six.text_type(err))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.action('removeProjectAccess')
     @wsgi.Controller.authorize('remove_project_access')
@@ -304,7 +305,7 @@ class ShareTypesController(wsgi.Controller):
             share_types.remove_share_type_access(context, id, project)
         except exception.ShareTypeAccessNotFound as err:
             raise webob.exc.HTTPNotFound(explanation=six.text_type(err))
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _verify_if_non_public_share_type(self, context, share_type_id):
         try:
diff --git a/manila/api/v2/shares.py b/manila/api/v2/shares.py
index e333360de3..5e54a4e6c6 100644
--- a/manila/api/v2/shares.py
+++ b/manila/api/v2/shares.py
@@ -15,6 +15,7 @@
 
 from oslo_log import log
 import six
+from six.moves import http_client
 import webob
 from webob import exc
 
@@ -157,7 +158,7 @@ class ShareController(shares.ShareMixin,
         except exception.ReplicationException as e:
             raise exc.HTTPBadRequest(explanation=six.text_type(e))
 
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     def _validate_revert_parameters(self, context, body):
         if not (body and self.is_valid_body(body, 'revert')):
@@ -287,7 +288,7 @@ class ShareController(shares.ShareMixin,
             msg = _("Share %s not found.") % id
             raise exc.HTTPNotFound(explanation=msg)
         self.share_api.migration_complete(context, share)
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.api_version('2.22', experimental=True)
     @wsgi.action("migration_cancel")
@@ -301,7 +302,7 @@ class ShareController(shares.ShareMixin,
             msg = _("Share %s not found.") % id
             raise exc.HTTPNotFound(explanation=msg)
         self.share_api.migration_cancel(context, share)
-        return webob.Response(status_int=202)
+        return webob.Response(status_int=http_client.ACCEPTED)
 
     @wsgi.Controller.api_version('2.22', experimental=True)
     @wsgi.action("migration_get_progress")