diff --git a/services/web/server/tests/unit/isolated/test_tracing.py b/services/web/server/tests/unit/isolated/test_tracing.py
index ddec0d10422..0b5069c7fe1 100644
--- a/services/web/server/tests/unit/isolated/test_tracing.py
+++ b/services/web/server/tests/unit/isolated/test_tracing.py
@@ -21,6 +21,7 @@ def mock_webserver_service_environment(
     return mock_webserver_service_environment | setenvs_from_dict(
         monkeypatch,
         {
+            "WEBSERVER_TRACING": "{}",
             "TRACING_OPENTELEMETRY_COLLECTOR_ENDPOINT": "http://opentelemetry-collector",
             "TRACING_OPENTELEMETRY_COLLECTOR_PORT": "4318",
         },