diff --git a/nova/api/openstack/compute/servers.py b/nova/api/openstack/compute/servers.py
index 95e32cc545bc..37bd1ff60126 100644
--- a/nova/api/openstack/compute/servers.py
+++ b/nova/api/openstack/compute/servers.py
@@ -389,14 +389,9 @@ class ServersController(wsgi.Controller):
         :raises: webob.exc.HTTPBadRequest if validation fails
         """
         if not uuidutils.is_uuid_like(net_id):
-            # NOTE(mriedem): Neutron would allow a network id with a br- prefix
-            # back in Folsom so continue to honor that.
-            # TODO(mriedem): Need to figure out if this is still a valid case.
-            br_uuid = net_id.split('-', 1)[-1]
-            if not uuidutils.is_uuid_like(br_uuid):
-                msg = _("Bad networks format: network uuid is "
-                        "not in proper format (%s)") % net_id
-                raise exc.HTTPBadRequest(explanation=msg)
+            msg = _("Bad networks format: network uuid is "
+                    "not in proper format (%s)") % net_id
+            raise exc.HTTPBadRequest(explanation=msg)
 
         # duplicate networks are allowed only for neutron v2.0
         if net_id in network_uuids and not utils.is_neutron():
diff --git a/nova/tests/unit/api/openstack/compute/test_serversV21.py b/nova/tests/unit/api/openstack/compute/test_serversV21.py
index 70f3e9a2f2ef..5475c9f954eb 100644
--- a/nova/tests/unit/api/openstack/compute/test_serversV21.py
+++ b/nova/tests/unit/api/openstack/compute/test_serversV21.py
@@ -302,11 +302,17 @@ class ServersControllerTest(ControllerTest):
         self.assertIsNotNone(ctxt.db_connection)
 
     def test_requested_networks_prefix(self):
+        """Tests that we no longer support the legacy br-<uuid> format for
+        a network id.
+        """
         self.flags(use_neutron=True)
         uuid = 'br-00000000-0000-0000-0000-000000000000'
         requested_networks = [{'uuid': uuid}]
-        res = self.controller._get_requested_networks(requested_networks)
-        self.assertIn((uuid, None, None, None), res.as_tuples())
+        ex = self.assertRaises(webob.exc.HTTPBadRequest,
+                               self.controller._get_requested_networks,
+                               requested_networks)
+        self.assertIn('Bad networks format: network uuid is not in proper '
+                      'format', six.text_type(ex))
 
     def test_requested_networks_neutronv2_enabled_with_port(self):
         self.flags(use_neutron=True)