diff --git a/tests/conftest.py b/tests/conftest.py
index fd3d10ec53..e0ce50bde4 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -136,6 +136,7 @@ def _dev(quirk, ieee=None, nwk=zigpy.types.NWK(0x1234), apply_quirk=True):
         raw_device = zigpy.device.Device(MockAppController, ieee, nwk)
         raw_device.manufacturer = manufacturer
         raw_device.model = model
+        raw_device.node_desc = NodeDescriptor(manufacturer_code=1234)
 
         endpoints = quirk.signature.get(ENDPOINTS, {})
         for ep_id, ep_data in endpoints.items():