diff --git a/.gitignore b/.gitignore
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 analysis/
 build/
 dist/
+.tox/
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/dir/tests/test_converters.py b/swh/loader/dir/tests/test_converters.py
--- a/swh/loader/dir/tests/test_converters.py
+++ b/swh/loader/dir/tests/test_converters.py
@@ -39,11 +39,11 @@
         super().tearDownClass()
 
     def test_format_to_minutes(self):
-        self.assertEquals(converters.format_to_minutes('+0100'), 60)
-        self.assertEquals(converters.format_to_minutes('-0200'), -120)
-        self.assertEquals(converters.format_to_minutes('+1250'), 12*60+50)
-        self.assertEquals(converters.format_to_minutes('+0000'), 0)
-        self.assertEquals(converters.format_to_minutes('-0000'), 0)
+        self.assertEqual(converters.format_to_minutes('+0100'), 60)
+        self.assertEqual(converters.format_to_minutes('-0200'), -120)
+        self.assertEqual(converters.format_to_minutes('+1250'), 12*60+50)
+        self.assertEqual(converters.format_to_minutes('+0000'), 0)
+        self.assertEqual(converters.format_to_minutes('-0000'), 0)
 
     def test_annotated_tag_to_release(self):
         # given
@@ -110,7 +110,7 @@
         actual_revision = converters.commit_to_revision(commit)
 
         # then
-        self.assertEquals(actual_revision, expected_revision)
+        self.assertEqual(actual_revision, expected_revision)
 
     def test_commit_to_revision_with_parents(self):
         """Commit with existing parents should not lose information
@@ -158,4 +158,4 @@
         actual_revision = converters.commit_to_revision(commit)
 
         # then
-        self.assertEquals(actual_revision, expected_revision)
+        self.assertEqual(actual_revision, expected_revision)
diff --git a/swh/loader/dir/tests/test_loader.py b/swh/loader/dir/tests/test_loader.py
--- a/swh/loader/dir/tests/test_loader.py
+++ b/swh/loader/dir/tests/test_loader.py
@@ -4,14 +4,13 @@
 # See top-level LICENSE file for more information
 
 import os
-
-from nose.plugins.attrib import attr
+import pytest
 
 from swh.loader.core.tests import BaseLoaderTest, LoaderNoStorage
 from swh.loader.dir.loader import DirLoader
 
 
-@attr('fs')
+@pytest.mark.fs
 class BaseDirLoaderTest(BaseLoaderTest):
     def setUp(self, archive_name='sample-folder.tgz'):
         super().setUp(archive_name=archive_name,
@@ -116,15 +115,15 @@
             branch_name=b'master')
 
         # then
-        self.assertEquals(len(objects), 5,
-                          "5 obj types: con, dir, rev, rel, snap")
-        self.assertEquals(len(objects['content']), 8,
-                          "8 contents: 3 files + 5 links")
-        self.assertEquals(len(objects['directory']), 6,
-                          "6 directories: 5 subdirs + 1 empty")
-        self.assertEquals(len(objects['revision']), 1, "synthetic revision")
-        self.assertEquals(len(objects['release']), 1, "synthetic release")
-        self.assertEquals(len(objects['snapshot']), 1, "snapshot")
+        self.assertEqual(len(objects), 5,
+                         "5 obj types: con, dir, rev, rel, snap")
+        self.assertEqual(len(objects['content']), 8,
+                         "8 contents: 3 files + 5 links")
+        self.assertEqual(len(objects['directory']), 6,
+                         "6 directories: 5 subdirs + 1 empty")
+        self.assertEqual(len(objects['revision']), 1, "synthetic revision")
+        self.assertEqual(len(objects['release']), 1, "synthetic release")
+        self.assertEqual(len(objects['snapshot']), 1, "snapshot")
 
 
 TEST_CONFIG = {
@@ -219,14 +218,11 @@
         self.assertCountRevisions(1)
 
         actual_revision = self.state('revision')[0]
-        self.assertEquals(actual_revision['synthetic'],
-                          True)
-        self.assertEquals(actual_revision['parents'],
-                          [])
-        self.assertEquals(actual_revision['type'],
-                          'tar')
-        self.assertEquals(actual_revision['message'],
-                          b'swh-loader-dir: synthetic revision message')
+        self.assertEqual(actual_revision['synthetic'], True)
+        self.assertEqual(actual_revision['parents'], [])
+        self.assertEqual(actual_revision['type'], 'tar')
+        self.assertEqual(actual_revision['message'],
+                         b'swh-loader-dir: synthetic revision message')
 
         self.assertCountReleases(0)
         self.assertCountSnapshots(1)
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