Update status test for index to use path

src/documents/tests/test_api_status.py

@@ -1,4 +1,5 @@
 import os
+from pathlib import Path
 from unittest import mock
 
 from django.contrib.auth.models import User
@@ -111,7 +112,7 @@ class TestSystemStatus(APITestCase):
         self.assertEqual(response.status_code, status.HTTP_200_OK)
         self.assertEqual(response.data["tasks"]["celery_status"], "OK")
 
-    @override_settings(INDEX_DIR="/tmp/index")
+    @override_settings(INDEX_DIR=Path("/tmp/index"))
     @mock.patch("whoosh.index.FileIndex.last_modified")
     def test_system_status_index_ok(self, mock_last_modified):
         """