diff --git a/swh/dataset/test/test_orc.py b/swh/dataset/test/test_orc.py
--- a/swh/dataset/test/test_orc.py
+++ b/swh/dataset/test/test_orc.py
@@ -327,7 +327,7 @@
     obj_type = "content"
     objstorage = get_objstorage("memory")
     for content in TEST_OBJECTS[obj_type]:
-        objstorage.add(content.data)
+        objstorage.add(content=content.data, obj_id=content.sha1)
 
     def get_objstorage_mock(**kw):
         if kw.get("cls") == "mock":