diff --git a/e2e_tests/conftest.py b/e2e_tests/conftest.py
index 07124540..c8091f0c 100644
--- a/e2e_tests/conftest.py
+++ b/e2e_tests/conftest.py
@@ -16,7 +16,6 @@ def port() -> int:
 
 @pytest.fixture(scope="session")
 def dummy_storage() -> optuna.storages.InMemoryStorage:
-
     storage = optuna.storages.InMemoryStorage()
     sampler = optuna.samplers.RandomSampler(seed=0)