diff --git a/tests/orchestrator/utils/test_orchestrator_functions.py b/tests/orchestrator/utils/test_orchestrator_functions.py
index ee91a1f..628b2f8 100644
--- a/tests/orchestrator/utils/test_orchestrator_functions.py
+++ b/tests/orchestrator/utils/test_orchestrator_functions.py
@@ -251,7 +251,7 @@ def test_gather_read_tags():
 def test_build_tag_config():
     tag = {'server_id': '1', 'server_name': 'test_server_name', 'tag_address': 'test_tag_address'}
     opc_servers = {'1': {'server_name': 'test_server_name', 'url': 'test_url', 'uri': 'test_uri'}}
-    slot_config = {'1': {}}
+    slot_config: dict = {'1': {}}
     i = 1
     result = build_tag_config(tag, slot_config, opc_servers, i)
     expected = {