diff --git a/test-packages/qubesadmin/exc.py b/test-packages/qubesadmin/exc.py
index 90b4d3c..a15b6e8 100644
--- a/test-packages/qubesadmin/exc.py
+++ b/test-packages/qubesadmin/exc.py
@@ -6,4 +6,7 @@ class QubesException(BaseException):
     pass
 
 class QubesVMNotStartedError(BaseException):
-    pass
\ No newline at end of file
+    pass
+
+class QubesPropertyAccessError(BaseException):
+    pass