diff --git a/nova/api/openstack/compute/evacuate.py b/nova/api/openstack/compute/evacuate.py
index f18ecace15e7..322032e40e1a 100644
--- a/nova/api/openstack/compute/evacuate.py
+++ b/nova/api/openstack/compute/evacuate.py
@@ -43,11 +43,10 @@ class EvacuateController(wsgi.Controller):
         self.host_api = compute.HostAPI()
 
     def _get_on_shared_storage(self, req, evacuate_body):
-        if (req.api_version_request <
-                api_version_request.APIVersionRequest("2.14")):
-            return strutils.bool_from_string(evacuate_body["onSharedStorage"])
-        else:
+        if api_version_request.is_supported(req, min_version='2.14'):
             return None
+        else:
+            return strutils.bool_from_string(evacuate_body["onSharedStorage"])
 
     def _get_password(self, req, evacuate_body, on_shared_storage):
         password = None
@@ -91,12 +90,11 @@ class EvacuateController(wsgi.Controller):
 
         on_shared_storage = self._get_on_shared_storage(req, evacuate_body)
 
-        if (req.api_version_request <
-                api_version_request.APIVersionRequest("2.14")):
+        if api_version_request.is_supported(req, min_version='2.14'):
+            password = self._get_password_v214(req, evacuate_body)
+        else:
             password = self._get_password(req, evacuate_body,
                                           on_shared_storage)
-        else:
-            password = self._get_password_v214(req, evacuate_body)
 
         if host is not None:
             try:
@@ -121,8 +119,7 @@ class EvacuateController(wsgi.Controller):
         except exception.ComputeServiceInUse as e:
             raise exc.HTTPBadRequest(explanation=e.format_message())
 
-        if (req.api_version_request <
-                api_version_request.APIVersionRequest("2.14") and
+        if (not api_version_request.is_supported(req, min_version='2.14') and
                 CONF.enable_instance_password):
             return {'adminPass': password}
         else:
diff --git a/nova/api/openstack/compute/server_groups.py b/nova/api/openstack/compute/server_groups.py
index 72406ae83830..ca5d72aae2f1 100644
--- a/nova/api/openstack/compute/server_groups.py
+++ b/nova/api/openstack/compute/server_groups.py
@@ -47,7 +47,7 @@ def _authorize_context(req):
 class ServerGroupController(wsgi.Controller):
     """The Server group API controller for the OpenStack API."""
 
-    def _format_server_group(self, context, group, req_ver):
+    def _format_server_group(self, context, group, req):
         # the id field has its value as the uuid of the server group
         # There is no 'uuid' key in server_group seen by clients.
         # In addition, clients see policies as a ["policy-name"] list;
@@ -69,7 +69,7 @@ class ServerGroupController(wsgi.Controller):
         server_group['members'] = members
         # Add project id information to the response data for
         # API version v2.13
-        if req_ver >= api_version_request.APIVersionRequest("2.13"):
+        if api_version_request.is_supported(req, min_version="2.13"):
             server_group['project_id'] = group.project_id
             server_group['user_id'] = group.user_id
         return server_group
@@ -77,15 +77,12 @@ class ServerGroupController(wsgi.Controller):
     @extensions.expected_errors(404)
     def show(self, req, id):
         """Return data about the given server group."""
-        req_ver = req.api_version_request
-
         context = _authorize_context(req)
         try:
             sg = objects.InstanceGroup.get_by_uuid(context, id)
         except nova.exception.InstanceGroupNotFound as e:
             raise webob.exc.HTTPNotFound(explanation=e.format_message())
-        return {'server_group': self._format_server_group(
-                context, sg, req_ver)}
+        return {'server_group': self._format_server_group(context, sg, req)}
 
     @wsgi.response(204)
     @extensions.expected_errors(404)
@@ -122,8 +119,6 @@ class ServerGroupController(wsgi.Controller):
     @extensions.expected_errors(())
     def index(self, req):
         """Returns a list of server groups."""
-        req_ver = req.api_version_request
-
         context = _authorize_context(req)
         project_id = context.project_id
         if 'all_projects' in req.GET and context.is_admin:
@@ -132,7 +127,7 @@ class ServerGroupController(wsgi.Controller):
             sgs = objects.InstanceGroupList.get_by_project_id(
                     context, project_id)
         limited_list = common.limited(sgs.objects, req)
-        result = [self._format_server_group(context, group, req_ver)
+        result = [self._format_server_group(context, group, req)
                   for group in limited_list]
         return {'server_groups': result}
 
@@ -140,8 +135,6 @@ class ServerGroupController(wsgi.Controller):
     @validation.schema(schema.create)
     def create(self, req, body):
         """Creates a new server group."""
-        req_ver = req.api_version_request
-
         context = _authorize_context(req)
 
         quotas = objects.Quotas(context=context)
@@ -165,8 +158,7 @@ class ServerGroupController(wsgi.Controller):
             raise exc.HTTPBadRequest(explanation=e)
 
         quotas.commit()
-        return {'server_group': self._format_server_group(context, sg,
-                                                           req_ver)}
+        return {'server_group': self._format_server_group(context, sg, req)}
 
 
 class ServerGroups(extensions.V21APIExtensionBase):
diff --git a/nova/api/openstack/compute/views/servers.py b/nova/api/openstack/compute/views/servers.py
index 1ce83f55bc6f..7d72cbc7ae56 100644
--- a/nova/api/openstack/compute/views/servers.py
+++ b/nova/api/openstack/compute/views/servers.py
@@ -305,8 +305,7 @@ class ViewBuilderV21(ViewBuilder):
         if server["server"]["status"] in self._progress_statuses:
             server["server"]["progress"] = instance.get("progress", 0)
 
-        if (request.api_version_request >=
-                api_version_request.APIVersionRequest("2.9")):
+        if api_version_request.is_supported(request, min_version="2.9"):
             server["server"]["locked"] = (True if instance["locked_by"]
                                           else False)