diff --git a/tests/test_api.py b/tests/test_api.py
index 2e49037f..de5d97d7 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -3,7 +3,7 @@ from unittest import TestCase
 
 import optuna
 from optuna_dashboard.app import create_app
-from .wsgi_utils import send_request
+from .wsgi_client import send_request
 
 
 class APITestCase(TestCase):
diff --git a/tests/wsgi_utils.py b/tests/wsgi_client.py
similarity index 100%
rename from tests/wsgi_utils.py
rename to tests/wsgi_client.py