diff --git a/test/test_api/test_call_signatures.py b/test/test_api/test_call_signatures.py
index 6d50f12e..8d1e890b 100644
--- a/test/test_api/test_call_signatures.py
+++ b/test/test_api/test_call_signatures.py
@@ -193,7 +193,8 @@ def test_signature_is_definition():
 
     # Now compare all the attributes that a CallSignature must also have.
     for attr_name in dir(definition):
-        dont_scan = ['defined_names', 'line_nr', 'start_pos', 'documentation', 'doc']
+        dont_scan = ['defined_names', 'line_nr', 'start_pos', 'documentation',
+                     'doc', 'parent']
         if attr_name.startswith('_') or attr_name in dont_scan:
             continue
         attribute = getattr(definition, attr_name)