diff --git a/swh/storage/api/client.py b/swh/storage/api/client.py
index 1c8d1648..0667570e 100644
--- a/swh/storage/api/client.py
+++ b/swh/storage/api/client.py
@@ -1,54 +1,54 @@
 # Copyright (C) 2015-2020  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from typing import Any, Dict, Iterable, Union
 
 from swh.core.api import RemoteException, RPCClient
 from swh.model.model import Content
 
 from ..exc import HashCollision, StorageAPIError, StorageArgumentException
 from ..interface import StorageInterface
 from .serializers import DECODERS, ENCODERS
 
 
 class RemoteStorage(RPCClient):
     """Proxy to a remote storage API"""
 
     api_exception = StorageAPIError
     backend_class = StorageInterface
     reraise_exceptions = [
         StorageArgumentException,
     ]
     extra_type_decoders = DECODERS
     extra_type_encoders = ENCODERS
 
     def raise_for_status(self, response) -> None:
         try:
             super().raise_for_status(response)
         except RemoteException as e:
             if (
                 e.response is not None
                 and e.response.status_code == 500
                 and e.args
                 and e.args[0].get("type") == "HashCollision"
             ):
                 # XXX: workaround until we fix these HashCollisions happening
                 # when they shouldn't
                 raise HashCollision(*e.args[0]["args"])
             else:
                 raise
 
     def content_add(self, content: Iterable[Union[Content, Dict[str, Any]]]):
         content = [c.with_data() if isinstance(c, Content) else c for c in content]
-        return self.post("content/add", {"content": content})
+        return self._post("content/add", {"content": content})
 
     def reset(self):
-        return self.post("reset", {})
+        return self._post("reset", {})
 
     def stat_counters(self):
         return self.get("stat/counters")
 
     def refresh_stat_counters(self):
         return self.get("stat/refresh")