diff --git a/models/silver/atlas/silver__atlas_maa.yml b/models/silver/atlas/silver__atlas_maa.yml
index 644dc2e..f7c8f2e 100644
--- a/models/silver/atlas/silver__atlas_maa.yml
+++ b/models/silver/atlas/silver__atlas_maa.yml
@@ -25,15 +25,9 @@ models:
 
       - name: inserted_timestamp
         description: "{{ doc('inserted_timestamp') }}"
-        tests:
-          - not_null
 
       - name: modified_timestamp
         description: "{{ doc('modified_timestamp') }}"
-        tests:
-          - not_null
 
-      - name: invocation_id
+      - name: _invocation_id
         description: "{{ doc('invocation_id') }}"
-        tests:
-          - not_null