diff --git a/test/test_classifier_routes.py b/test/test_classifier_routes.py
index c7f945f72440efca94172f7953074f460b28c507..e799c11c9b68cdda37ffb44a57bba899ece2b473 100644
--- a/test/test_classifier_routes.py
+++ b/test/test_classifier_routes.py
@@ -49,8 +49,14 @@ JUNIPER_LINK_METADATA = {
             "properties": {
                 "id": {"type": "integer"},
                 "name": {"type": "string"},
-                "status": {"type": "string"},
-                "circuit_type": {"type": "string"},
+                "status": {
+                    "type": "string",
+                    "enum": ["operational", "installed", "planned", "ordered"]
+                },
+                "circuit_type": {
+                    "type": "string",
+                    "enum": ["path", "service", "l2circuit"]
+                },
                 "service_type": {"type": "string"},
                 "project": {"type": "string"},
                 "equipment": {"type": "string"},
@@ -68,7 +74,13 @@ JUNIPER_LINK_METADATA = {
                         {"type": "string", "maxLength": 0}
                     ]
                 },
-                "manufacturer": {"type": "string"},
+                "manufacturer": {
+                    "type": "string",
+                    "enum": ["juniper", "coriant", "infinera",
+                             "cisco", "hewlett packard",
+                             "corsa", "graham smith uk ltd",
+                             "unknown", ""]
+                },
                 "card_id": {"type": "string"},
                 "other_end_card_id": {"type": "string"},
                 "interface_name": {"type": "string"},
@@ -99,6 +111,7 @@ JUNIPER_LINK_METADATA = {
             "items": {"$ref": "#/definitions/service-info"}
         }
     },
+    "required": ["interface"],
     "additionalProperties": False
 }