diff --git a/debian/control b/debian/control
index 4f7eed1..df384cf 100644
--- a/debian/control
+++ b/debian/control
@@ -1,34 +1,34 @@
 Source: swh-vault
 Maintainer: Software Heritage developers <swh-devel@inria.fr>
 Section: python
 Priority: optional
 Build-Depends: debhelper (>= 9),
                dh-python (>= 2),
                python3-all,
                python3-click,
                python3-dateutil,
                python3-dulwich,
                python3-fastimport,
                python3-flask,
                python3-nose,
                python3-psycopg2,
                python3-setuptools,
                python3-swh.core (>= 0.0.44~),
-               python3-swh.model (>= 0.0.18~),
+               python3-swh.model (>= 0.0.27~),
                python3-swh.objstorage (>= 0.0.17~),
                python3-swh.scheduler (>= 0.0.26~),
                python3-swh.storage (>= 0.0.108~),
                python3-vcversioner
 Standards-Version: 3.9.6
 Homepage: https://forge.softwareheritage.org/diffusion/DVAU/
 
 Package: python3-swh.vault
 Architecture: all
 Depends: python3-swh.core (>= 0.0.44~),
-         python3-swh.model (>= 0.0.18~),
+         python3-swh.model (>= 0.0.27~),
          python3-swh.objstorage (>= 0.0.17~),
          python3-swh.scheduler (>= 0.0.26~),
          python3-swh.storage (>= 0.0.108~),
          ${misc:Depends},
          ${python3:Depends}
 Description: Software Heritage Vault
diff --git a/requirements-swh.txt b/requirements-swh.txt
index 65a75e3..d7eec3d 100644
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,5 +1,5 @@
 swh.core >= 0.0.44
-swh.model >= 0.0.18
+swh.model >= 0.0.27
 swh.objstorage >= 0.0.17
 swh.scheduler >= 0.0.26
 swh.storage >= 0.0.106
diff --git a/swh/vault/tests/vault_testing.py b/swh/vault/tests/vault_testing.py
index 7b71330..2ab5280 100644
--- a/swh/vault/tests/vault_testing.py
+++ b/swh/vault/tests/vault_testing.py
@@ -1,64 +1,74 @@
 # Copyright (C) 2017  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
 
 import os
 import tempfile
 
 from swh.model import hashutil
 from swh.vault.backend import VaultBackend
 
 from swh.storage.tests.storage_testing import StorageTestFixture
 from swh.vault.tests import SQL_DIR
 
 
 class VaultTestFixture(StorageTestFixture):
     """Mix this in a test subject class to get Vault Database testing support.
 
     This fixture requires to come before DbTestFixture and StorageTestFixture
     in the inheritance list as it uses their methods to setup its own internal
     components.
 
     Usage example:
 
         class TestVault(VaultTestFixture, unittest.TestCase):
             ...
     """
     TEST_DB_NAME = 'softwareheritage-test-vault'
     TEST_DB_DUMP = [StorageTestFixture.TEST_DB_DUMP,
                     os.path.join(SQL_DIR, '*.sql')]
 
     def setUp(self):
         super().setUp()
         self.cache_root = tempfile.TemporaryDirectory('vault-cache-')
         self.vault_config = {
             'storage': self.storage_config,
             'cache': {
                 'cls': 'pathslicing',
                 'args': {
                     'root': self.cache_root.name,
                     'slicing': '0:1/1:5',
                     'allow_delete': True,
                 }
             },
             'db': 'postgresql:///' + self.TEST_DB_NAME,
             'scheduler': None,
         }
         self.vault_backend = VaultBackend(self.vault_config)
 
     def tearDown(self):
         self.cache_root.cleanup()
         self.vault_backend.close()
         self.reset_storage_tables()
         self.reset_vault_tables()
         super().tearDown()
 
     def reset_vault_tables(self):
         excluded = {'dbversion'}
         self.reset_db_tables(self.TEST_DB_NAME, excluded=excluded)
 
 
 def hash_content(content):
-    obj_id = hashutil.hash_data(content)['sha1']
-    return content, obj_id
+    """Hash the content's id (sha1).
+
+    Args:
+        content (bytes): Content to hash
+
+    Returns:
+        The tuple (content, content's id as bytes)
+
+    """
+    hashes = hashutil.MultiHash.from_data(
+        content, hash_names=['sha1']).digest()
+    return content, hashes['sha1']