diff --git a/requirements-swh.txt b/requirements-swh.txt
index d69fcef..6c19765 100644
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,4 +1,4 @@
-swh.core >= 0.0.51
+swh.core >= 0.0.54
 swh.model >= 0.0.27
 swh.objstorage >= 0.0.17
 swh.scheduler >= 0.0.14
diff --git a/swh/storage/tests/test_db.py b/swh/storage/tests/test_db.py
index 4e71726..717890e 100644
--- a/swh/storage/tests/test_db.py
+++ b/swh/storage/tests/test_db.py
@@ -1,50 +1,50 @@
 # Copyright (C) 2015-2017  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 unittest
 
 import pytest
 
 from swh.core.tests.db_testing import SingleDbTestFixture
 from swh.model.hashutil import hash_to_bytes
 from swh.storage.db import Db
 from . import SQL_DIR
 
 
 @pytest.mark.db
 class TestDb(SingleDbTestFixture, unittest.TestCase):
     TEST_DB_NAME = 'softwareheritage-test-storage'
     TEST_DB_DUMP = os.path.join(SQL_DIR, '*.sql')
 
     def setUp(self):
         super().setUp()
         self.db = Db(self.conn)
 
     def tearDown(self):
         self.db.conn.close()
         super().tearDown()
 
     def test_add_content(self):
         cur = self.cursor
         sha1 = hash_to_bytes('34973274ccef6ab4dfaaf86599792fa9c3fe4689')
         self.db.mktemp('content', cur)
         self.db.copy_to([{
             'sha1': sha1,
             'sha1_git': hash_to_bytes(
                 'd81cc0710eb6cf9efd5b920a8453e1e07157b6cd'),
             'sha256': hash_to_bytes(
                 '673650f936cb3b0a2f93ce09d81be107'
                 '48b1b203c19e8176b4eefc1964a0cf3a'),
             'blake2s256': hash_to_bytes('69217a3079908094e11121d042354a7c'
                                         '1f55b6482ca1a51e1b250dfd1ed0eef9'),
             'length': 3}],
                         'tmp_content',
                         ['sha1', 'sha1_git', 'sha256', 'blake2s256', 'length'],
                         cur)
         self.db.content_add_from_temp(cur)
         self.cursor.execute('SELECT sha1 FROM content WHERE sha1 = %s',
                             (sha1,))
-        self.assertEqual(self.cursor.fetchone()[0].tobytes(), sha1)
+        self.assertEqual(self.cursor.fetchone()[0], sha1)