diff --git a/backend/tests/test_api.py b/backend/tests/test_api.py
index 87e979c..df015fb 100644
--- a/backend/tests/test_api.py
+++ b/backend/tests/test_api.py
@@ -113,7 +113,7 @@ def test_list_events_filter_by_services(client, mock_events_collection):
             "raw_text": "",
         }
     )
-    response = client.get("/api/events?service=Exchange&service=Directory")
+    response = client.get("/api/events?services=Exchange&services=Directory")
     assert response.status_code == 200
     data = response.json()
     assert len(data["items"]) == 2