diff --git a/api_tests/users/views/test_user_claim.py b/api_tests/users/views/test_user_claim.py
index 68e6cfd52dd..20e19dbf30d 100644
--- a/api_tests/users/views/test_user_claim.py
+++ b/api_tests/users/views/test_user_claim.py
@@ -148,7 +148,7 @@ def test_claim_unauth_success_with_unknown_email(self, app, url, project, unreg_
     def test_claim_unauth_success_with_preprint_id(self, app, url, preprint, unreg_user, mock_mail):
         res = app.post_json_api(
             url.format(unreg_user._id),
-            self.payload(email='david@david.son', id=preprint._id),
+            self.payload(email='david@david.son', id=preprint.get_guid()._id),
         )
         assert res.status_code == 204
         assert mock_mail.call_count == 1