From 9a255b223c31d91fbdcc69b5a5b3db9f92cabadd Mon Sep 17 00:00:00 2001
From: c-bata <contact@c-bata.link>
Date: Sat, 10 Apr 2021 05:39:23 +0900
Subject: [PATCH] Fix a mypy error

---
 visual_regression_test.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/visual_regression_test.py b/visual_regression_test.py
index c0c2efa4..be7463c7 100644
--- a/visual_regression_test.py
+++ b/visual_regression_test.py
@@ -164,6 +164,7 @@ async def take_screenshots(storage: optuna.storages.BaseStorage) -> None:
 
 def main() -> None:
     os.makedirs(args.output_dir, exist_ok=True)
+    storage: optuna.storages.BaseStorage
     if args.storage:
         storage = optuna.storages.RDBStorage(args.storage)
     else: