diff --git a/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_simple.py b/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_simple.py
index 8f6c2428ed..4ff241fd0c 100644
--- a/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_simple.py
+++ b/monitoring/uss_qualifier/scenarios/astm/utm/dss/op_intent_ref_simple.py
@@ -221,9 +221,9 @@ def _step_attempt_mutation_missing_ovn(self):
                 )
             except QueryError as qe:
                 self.record_queries(qe.queries)
-                if qe.cause_status_code in [400, 409]:
-                    # An empty OVN can be seen as both an incorrect parameter as well as a conflict
-                    # because the value is incorrect: we accept both a 400 and 409 return code here.
+                if qe.cause_status_code in [400, 404, 409]:
+                    # An empty OVN can be seen as:
+                    # an incorrect parameter (400), a reference to a non-existing entity (404) as well as a conflict (409)
                     pass
                 else:
                     check.record_failed(