Skip unit test with optuna version

python_tests/test_csv_download.py

@@ -5,11 +5,16 @@ from typing import Any
 import optuna
 from optuna.trial import TrialState
 from optuna_dashboard._app import create_app
+from packaging import version
 import pytest
 
 from .wsgi_client import send_request
 
 
+if version.parse(optuna.__version__) < version.parse("3.2.0"):
+    pytest.skip("Study.metrics_name is introduced at v3.2.0", allow_module_level=True)
+
+
 def _validate_output(
     storage: optuna.storages.BaseStorage,
     correct_status: int,