diff --git a/tests/storage/dav/__init__.py b/tests/storage/dav/__init__.py
index 33c8417..a7bbd43 100644
--- a/tests/storage/dav/__init__.py
+++ b/tests/storage/dav/__init__.py
@@ -16,7 +16,7 @@ from vdirsyncer.storage.base import Item
 import requests.exceptions
 
 
-dav_server = os.environ.get('DAV_SERVER', '').strip() or 'radicale'
+dav_server = os.environ.get('DAV_SERVER', '').strip() or 'radicale_filesystem'
 if dav_server.startswith('radicale_'):
     from ._radicale import ServerMixin
 elif dav_server == 'owncloud':