create server helper fields
diff --git a/openstack/compute/v2/extensions/diskconfig/requests_test.go b/openstack/compute/v2/extensions/diskconfig/requests_test.go
index e3c26d4..17418a3 100644
--- a/openstack/compute/v2/extensions/diskconfig/requests_test.go
+++ b/openstack/compute/v2/extensions/diskconfig/requests_test.go
@@ -25,6 +25,8 @@
 				"name": "createdserver",
 				"imageRef": "asdfasdfasdf",
 				"flavorRef": "performance1-1",
+				"flavorName": "",
+				"imageName": "",
 				"OS-DCF:diskConfig": "MANUAL"
 			}
 		}