diff --git a/conftest.py b/conftest.py
--- a/conftest.py
+++ b/conftest.py
@@ -24,10 +24,8 @@
                 {"cls": "buffer"},
                 {
                     "cls": "local",
-                    "args": {
-                        "db": swh_storage_postgresql.dsn,
-                        "objstorage": {"cls": "memory", "args": {}},
-                    },
+                    "db": swh_storage_postgresql.dsn,
+                    "objstorage": {"cls": "memory", "args": {}},
                 },
             ],
         },
diff --git a/swh/loader/core/loader.py b/swh/loader/core/loader.py
--- a/swh/loader/core/loader.py
+++ b/swh/loader/core/loader.py
@@ -63,10 +63,7 @@
     CONFIG_BASE_FILENAME = None  # type: Optional[str]
 
     DEFAULT_CONFIG = {
-        "storage": (
-            "dict",
-            {"cls": "remote", "args": {"url": "http://localhost:5002/",}},
-        ),
+        "storage": ("dict", {"cls": "remote", "url": "http://localhost:5002/",}),
         "max_content_size": ("int", 100 * 1024 * 1024),
         "save_data": ("bool", False),
         "save_data_path": ("str", ""),