diff --git a/debian/control b/debian/control
index af997da..4fb1d3f 100644
--- a/debian/control
+++ b/debian/control
@@ -1,32 +1,32 @@
 Source: swh-objstorage
 Maintainer: Software Heritage developers <swh-devel@inria.fr>
 Section: python
 Priority: optional
 Build-Depends: debhelper (>= 9),
                dh-python (>= 2),
                python3-aiohttp (>= 2.1.0),
                python3-all,
                python3-flask,
                python3-nose,
                python3-setuptools,
-               python3-swh.core (>= 0.0.28~),
+               python3-swh.core (>= 0.0.37~),
                python3-swh.model (>= 0.0.14~),
                python3-click,
                python3-libcloud,
                python3-azure-storage,
                python3-vcversioner
 Standards-Version: 3.9.6
 Homepage: https://forge.softwareheritage.org/diffusion/DOBJS/
 
 Package: python3-swh.objstorage
 Architecture: all
-Depends: python3-swh.core (>= 0.0.28~), ${misc:Depends}, ${python3:Depends}, python3-aiohttp (>= 2.1.0)
+Depends: python3-swh.core (>= 0.0.37~), ${misc:Depends}, ${python3:Depends}, python3-aiohttp (>= 2.1.0)
 Description: Software Heritage Object Storage
 
 Package: python3-swh.objstorage.cloud
 Architecture: all
 Depends: python3-swh.objstorage (= ${binary:Version}), python3-libcloud, python3-azure-storage,
          ${misc:Depends}, ${python3:Depends}
 Breaks: python3-swh.objstorage (<= 0.0.7~)
 Description: Software Heritage Cloud Object Storage
 
diff --git a/requirements-swh.txt b/requirements-swh.txt
index 464723a..c193587 100644
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,2 +1,2 @@
-swh.core >= 0.0.28
+swh.core >= 0.0.37
 swh.model >= 0.0.14
diff --git a/swh/objstorage/tests/server_testing.py b/swh/objstorage/tests/server_testing.py
deleted file mode 100644
index 02cc94e..0000000
--- a/swh/objstorage/tests/server_testing.py
+++ /dev/null
@@ -1,81 +0,0 @@
-# Copyright (C) 2015  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 aiohttp.web
-import multiprocessing
-import socket
-import time
-
-from urllib.request import urlopen
-
-
-class ServerTestFixture():
-    """ Base class for http client/server testing.
-
-    Mix this in a test class in order to have access to an http flask
-    server running in background.
-
-    Note that the subclass should define a dictionary in self.config
-    that contains the flask server config.
-    And a flask application in self.app that corresponds to the type of
-    server the tested client needs.
-
-    To ensure test isolation, each test will run in a different server
-    and a different repertory.
-
-    In order to correctly work, the subclass must call the parents class's
-    setUp() and tearDown() methods.
-    """
-
-    def setUp(self):
-        super().setUp()
-        self.start_server()
-
-    def tearDown(self):
-        self.stop_server()
-        super().tearDown()
-
-    def url(self):
-        return 'http://127.0.0.1:%d/' % self.port
-
-    def start_server(self):
-        """ Spawn the API server using multiprocessing.
-        """
-        self.process = None
-
-        # WSGI app configuration
-        for key, value in self.config.items():
-            self.app[key] = value
-        # Get an available port number
-        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        sock.bind(('127.0.0.1', 0))
-        self.port = sock.getsockname()[1]
-        sock.close()
-
-        # Worker function for multiprocessing
-        def worker(app, port):
-            return aiohttp.web.run_app(app, port=port, print=lambda *_: None)
-
-        self.process = multiprocessing.Process(
-            target=worker, args=(self.app, self.port)
-        )
-        self.process.start()
-
-        # Wait max 5 seconds for server to spawn
-        i = 0
-        while i < 100:
-            try:
-                urlopen(self.url())
-            except Exception:
-                i += 1
-                time.sleep(0.1)
-            else:
-                return
-
-    def stop_server(self):
-        """ Terminate the API server's process.
-        """
-        if self.process:
-            self.process.terminate()
diff --git a/swh/objstorage/tests/test_objstorage_api.py b/swh/objstorage/tests/test_objstorage_api.py
index 7946075..c482a8e 100644
--- a/swh/objstorage/tests/test_objstorage_api.py
+++ b/swh/objstorage/tests/test_objstorage_api.py
@@ -1,35 +1,35 @@
-# Copyright (C) 2015  The Software Heritage developers
+# Copyright (C) 2015-2018  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 tempfile
 import unittest
 
+from swh.core.tests.server_testing import ServerTestFixtureAsync
 from swh.objstorage import get_objstorage
 from swh.objstorage.tests.objstorage_testing import ObjStorageTestFixture
-from swh.objstorage.tests.server_testing import ServerTestFixture
 from swh.objstorage.api.server import make_app
 
 
-class TestRemoteObjStorage(ServerTestFixture, ObjStorageTestFixture,
+class TestRemoteObjStorage(ServerTestFixtureAsync, ObjStorageTestFixture,
                            unittest.TestCase):
     """ Test the remote archive API.
     """
 
     def setUp(self):
         self.config = {
             'cls': 'pathslicing',
             'args': {
                 'root': tempfile.mkdtemp(),
                 'slicing': '0:1/0:5',
                 'allow_delete': True,
             },
             'client_max_size': 8 * 1024 * 1024,
         }
 
         self.app = make_app(self.config)
         super().setUp()
         self.storage = get_objstorage('remote', {
             'url': self.url()
         })