diff --git a/tests/_device_tests/_attributes_tests.py b/tests/_device_tests/_attributes_tests.py
index 71b3a7a..9136cea 100644
--- a/tests/_device_tests/_attributes_tests.py
+++ b/tests/_device_tests/_attributes_tests.py
@@ -49,7 +49,7 @@ def test_getitem(self, a_context, device_datum):
         device = Devices.from_path(a_context, device_datum.device_path)
         assert all(
             isinstance(device.attributes.get(key), bytes)
-            for key in device_datum.attributes.keys()
+            for key in device_datum.attributes.keys() if key is not None
         )
 
     @given(strategies.sampled_from(_DEVICES))