Improving the assertion of calls.

src/opticalattackdetector/tests/test_unitary.py

@@ -73,6 +73,6 @@ def test_detect_attack(
             request.service_id.service_uuid.uuid = str(uuid.uuid4())
             request.kpi_id.kpi_id.uuid = "1"
             optical_attack_detector_client.DetectAttack(request)
-            dbscanserving.assert_called_once()
+            dbscanserving.assert_called()
             monitoring.assert_called_once()
         mitigator.NotifyAttack.assert_called()