diff --git a/tests/unit/managers/test_opc_manager.py b/tests/unit/managers/test_opc_manager.py
index 7cdfb80..5774544 100644
--- a/tests/unit/managers/test_opc_manager.py
+++ b/tests/unit/managers/test_opc_manager.py
@@ -554,7 +554,7 @@ def test_init_metrics_calls_correct_metric_methods(mock_metrics):
         metadata=metadata["metadata"],
     )
 
-    mock_metrics.OPC_CONNECTION_STATUS.labels.assert_called_once_with(
+    mock_metrics.OPC_CONNECTION_STATUS.labels.assert_called_with(
         pod_id=opc_manager.pod_id,
         server_name=opc_manager.name,
         server_url=opc_manager.url,