diff --git a/.gitignore b/.gitignore
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,4 @@
 version.txt
 build/
 dist/
-.tox
+.tox/
diff --git a/debian/control b/debian/control
--- a/debian/control
+++ b/debian/control
@@ -11,8 +11,8 @@
                python3-requests,
                python3-setuptools,
                python3-swh.core,
-               python3-swh.loader.core (>= 0.0.34~),
-               python3-swh.model (>= 0.0.27~),
+               python3-swh.loader.core (>= 0.0.35~),
+               python3-swh.model (>= 0.0.28~),
                python3-swh.storage (>= 0.0.108~),
                python3-swh.scheduler,
                python3-vcversioner
@@ -22,8 +22,8 @@
 Package: python3-swh.loader.pypi
 Architecture: all
 Depends: python3-swh.core,
-         python3-swh.loader.core (>= 0.0.34~),
-         python3-swh.model (>= 0.0.27~),
+         python3-swh.loader.core (>= 0.0.35~),
+         python3-swh.model (>= 0.0.28~),
          python3-swh.storage (>= 0.0.108~),
          ${misc:Depends}, ${python3:Depends}
 Description: Software Heritage PyPI Loader
diff --git a/requirements-swh.txt b/requirements-swh.txt
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,5 +1,5 @@
 swh.core
-swh.model >= 0.0.27
+swh.model >= 0.0.28
 swh.storage >= 0.0.108
 swh.scheduler
-swh.loader.core >= 0.0.34
+swh.loader.core >= 0.0.35
diff --git a/requirements-test.txt b/requirements-test.txt
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1 +1 @@
-nose
+pytest
diff --git a/swh/loader/pypi/tests/test_client.py b/swh/loader/pypi/tests/test_client.py
--- a/swh/loader/pypi/tests/test_client.py
+++ b/swh/loader/pypi/tests/test_client.py
@@ -55,7 +55,7 @@
         for pkginfo, author, release, artifact, dir_path in actual_releases:
             version = pkginfo['version']
             expected_pkginfo = _project_pkginfo(dir_path)
-            self.assertEquals(pkginfo, expected_pkginfo)
+            self.assertEqual(pkginfo, expected_pkginfo)
             expected_author = converters.author(expected_pkginfo)
             self.assertEqual(author, expected_author)
             expected_artifact = expected_release_artifacts[version]
diff --git a/swh/loader/pypi/tests/test_converters.py b/swh/loader/pypi/tests/test_converters.py
--- a/swh/loader/pypi/tests/test_converters.py
+++ b/swh/loader/pypi/tests/test_converters.py
@@ -70,7 +70,7 @@
             'email': b'iam@groot.org',
         }
 
-        self.assertEquals(actual_author, expected_author)
+        self.assertEqual(actual_author, expected_author)
 
     def test_author_malformed(self):
         data = {
@@ -86,7 +86,7 @@
             'email': None,
         }
 
-        self.assertEquals(actual_author, expected_author)
+        self.assertEqual(actual_author, expected_author)
 
     def test_author_malformed_2(self):
         data = {
@@ -102,7 +102,7 @@
             'email': b'[marie@some, jeanne@thing]',
         }
 
-        self.assertEquals(actual_author, expected_author)
+        self.assertEqual(actual_author, expected_author)
 
     def test_author_malformed_3(self):
         data = {
@@ -118,4 +118,4 @@
             'email': b'[marie@somewhere.org, jeanne@somewhere.org]',
         }
 
-        self.assertEquals(actual_author, expected_author)
+        self.assertEqual(actual_author, expected_author)
diff --git a/swh/loader/pypi/tests/test_loader.py b/swh/loader/pypi/tests/test_loader.py
--- a/swh/loader/pypi/tests/test_loader.py
+++ b/swh/loader/pypi/tests/test_loader.py
@@ -4,7 +4,6 @@
 # See top-level LICENSE file for more information
 
 import json
-import shutil
 import tempfile
 
 from nose.plugins.attrib import attr
@@ -239,7 +238,7 @@
         self.assertSnapshotOk(expected_snapshot_id, expected_branches)
 
         _id = hashutil.hash_to_hex(self.loader._last_snapshot()['id'])
-        self.assertEquals(expected_snapshot_id, _id)
+        self.assertEqual(expected_snapshot_id, _id)
 
         self.assertEqual(self.loader.load_status(), {'status': 'uneventful'})
         self.assertEqual(self.loader.visit_status(), 'full')
diff --git a/tox.ini b/tox.ini
new file mode 100644
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,16 @@
+[tox]
+envlist=flake8,py3
+
+[testenv:py3]
+deps =
+  .[testing]
+  pytest-cov
+commands =
+  pytest --cov=swh --cov-branch {posargs}
+
+[testenv:flake8]
+skip_install = true
+deps =
+  flake8
+commands =
+  {envpython} -m flake8