diff --git a/e2e_tests/test_dashboard/visual_regression_test.py b/e2e_tests/test_dashboard/visual_regression_test.py
index ea6ff930..876c585b 100644
--- a/e2e_tests/test_dashboard/visual_regression_test.py
+++ b/e2e_tests/test_dashboard/visual_regression_test.py
@@ -4,11 +4,22 @@ import optuna
 from playwright.sync_api import Page
 import pytest
 
+from optuna_dashboard._storage import trials_cache
+from optuna_dashboard._storage import trials_cache_lock
+from optuna_dashboard._storage import trials_last_fetched_at
+
 from ..test_server import make_test_server
 
 
+def clear_inmemory_cache() -> None:
+    with trials_cache_lock:
+        trials_cache.clear()
+        trials_last_fetched_at.clear()
+
+
 @pytest.fixture
 def storage() -> optuna.storages.InMemoryStorage:
+    clear_inmemory_cache()
     storage = optuna.storages.InMemoryStorage()
     return storage