diff --git a/tests/unit/routes/test_person_router.py b/tests/unit/routes/test_person_router.py
index 7b51e62f..16450d03 100644
--- a/tests/unit/routes/test_person_router.py
+++ b/tests/unit/routes/test_person_router.py
@@ -164,7 +164,7 @@ def test1InvalidPersonId(self, client):
 
     def testPersonIdsNottheSame(self, client):
         # Test that a 422 will be raised if the merge_into_id is in the person_reference_ids
-        person1 = models.Person()
+        person1 = models.Person(reference_id=uuid.uuid4())
 
         response = client.post(
             f"/person/{person1.reference_id}/merge/",