diff --git a/swh/storage/in_memory.py b/swh/storage/in_memory.py
--- a/swh/storage/in_memory.py
+++ b/swh/storage/in_memory.py
@@ -201,7 +201,11 @@
                 yield None
                 continue
 
-            yield {'sha1': obj_id, 'data': data}
+            if(end!=-1):
+                yield {'sha1': obj_id, 'data': data[start:end]}
+            else:
+                yield {'sha1': obj_id, 'data': data}
+
 
     def content_get_range(self, start, end, limit=1000, db=None, cur=None):
         """Retrieve contents within range [start, end] bound by limit.
diff --git a/swh/storage/storage.py b/swh/storage/storage.py
--- a/swh/storage/storage.py
+++ b/swh/storage/storage.py
@@ -369,7 +369,10 @@
                 yield None
                 continue
 
-            yield {'sha1': obj_id, 'data': data}
+            if(end!=-1):
+                yield {'sha1': obj_id, 'data': data[start:end]}
+            else:
+                yield {'sha1': obj_id, 'data': data}
 
     @db_transaction()
     def content_get_range(self, start, end, limit=1000, db=None, cur=None):