diff --git a/swh/vault/tests/conftest.py b/swh/vault/tests/conftest.py
--- a/swh/vault/tests/conftest.py
+++ b/swh/vault/tests/conftest.py
@@ -46,7 +46,7 @@
     return {
         "db": postgres_vault.dsn,
         "storage": {
-            "cls": "local",
+            "cls": "postgresql",
             "db": postgres_storage.dsn,
             "objstorage": {
                 "cls": "pathslicing",