diff --git a/nova/api/openstack/placement/handlers/aggregate.py b/nova/api/openstack/placement/handlers/aggregate.py
index 271159fe1..c48cd450c 100644
--- a/nova/api/openstack/placement/handlers/aggregate.py
+++ b/nova/api/openstack/placement/handlers/aggregate.py
@@ -52,7 +52,7 @@ def get_aggregates(req):
     On success return a 200 with an application/json body containing a
     list of aggregate uuids.
     """
-    microversion.raise_404_if_not_version(req, (1, 1))
+    microversion.raise_http_status_code_if_not_version(req, 404, (1, 1))
     context = req.environ['placement.context']
     uuid = util.wsgi_path_item(req.environ, 'uuid')
     resource_provider = objects.ResourceProvider.get_by_uuid(
@@ -65,7 +65,7 @@ def get_aggregates(req):
 @webob.dec.wsgify
 @util.require_content('application/json')
 def set_aggregates(req):
-    microversion.raise_404_if_not_version(req, (1, 1))
+    microversion.raise_http_status_code_if_not_version(req, 404, (1, 1))
     context = req.environ['placement.context']
     uuid = util.wsgi_path_item(req.environ, 'uuid')
     resource_provider = objects.ResourceProvider.get_by_uuid(
diff --git a/nova/api/openstack/placement/microversion.py b/nova/api/openstack/placement/microversion.py
index 45a3f1193..847127bbf 100644
--- a/nova/api/openstack/placement/microversion.py
+++ b/nova/api/openstack/placement/microversion.py
@@ -73,11 +73,22 @@ def parse_version_string(version_string):
             version_string, exc))
 
 
-def raise_404_if_not_version(req, min_version, max_version=None):
-    """Utility to raise a 404 if the wanted microversion does not match."""
+def raise_http_status_code_if_not_version(req, status_code, min_version,
+                                          max_version=None):
+    """Utility to raise a http status code if the wanted microversion does not
+       match.
+
+    :param req: The HTTP request for the placement api
+    :param status_code: HTTP status code (integer value) to be raised
+    :param min_version: Minimum placement microversion level
+    :param max_version: Maximum placement microversion level
+    :returns: None
+    :raises: HTTP status code if the specified microversion does not match
+    :raises: KeyError if status_code is not a valid HTTP status code
+    """
     want_version = req.environ[MICROVERSION_ENVIRON]
     if not want_version.matches(min_version, max_version):
-        raise webob.exc.HTTPNotFound
+        raise webob.exc.status_map[status_code]
 
 
 class MicroversionMiddleware(object):
diff --git a/nova/tests/unit/api/openstack/placement/test_microversion.py b/nova/tests/unit/api/openstack/placement/test_microversion.py
index 4c5d96c4a..88b019d38 100644
--- a/nova/tests/unit/api/openstack/placement/test_microversion.py
+++ b/nova/tests/unit/api/openstack/placement/test_microversion.py
@@ -16,6 +16,7 @@ import collections
 import operator
 
 import mock
+import webob
 
 # import the handlers to load up handler decorators
 import nova.api.openstack.placement.handler  # noqa
@@ -106,3 +107,23 @@ class TestMicroversionIntersection(test.NoDBTestCase):
             self.assertFalse(
                 self._check_intersection(method_info),
                 'method %s has intersecting versioned handlers' % method_name)
+
+
+class TestMicroversionUtility(test.NoDBTestCase):
+
+    req = webob.Request.blank('/', method="GET")
+    req.accept = 'application/json'
+
+    def test_raise_405_out_of_date_version(self):
+        version_obj = microversion.parse_version_string('1.4')
+        self.req.environ['placement.microversion'] = version_obj
+        self.assertRaises(webob.exc.HTTPMethodNotAllowed,
+             microversion.raise_http_status_code_if_not_version,
+             self.req, 405, (1, 5))
+
+    def test_raise_keyerror_out_of_date_version(self):
+        version_obj = microversion.parse_version_string('1.4')
+        self.req.environ['placement.microversion'] = version_obj
+        self.assertRaises(KeyError,
+             microversion.raise_http_status_code_if_not_version,
+             self.req, 999, (1, 5))