diff --git a/facebook_business/adobjects/leadgenform.py b/facebook_business/adobjects/leadgenform.py
index 9de9963e..4b3c22c1 100644
--- a/facebook_business/adobjects/leadgenform.py
+++ b/facebook_business/adobjects/leadgenform.py
@@ -276,7 +276,7 @@ def create_test_lead(self, fields=None, params=None, batch=None, success=None, f
         'questions': 'list<LeadGenQuestion>',
         'status': 'string',
         'thank_you_page': 'LeadGenThankYouPage',
-        'tracking_parameters': 'list<map<string, string>>',
+        'tracking_parameters': 'list<KeyValue>',
     }
     @classmethod
     def _get_field_enum_info(cls):