diff --git a/.flake8 b/.flake8
deleted file mode 100644
index eceea15..0000000
--- a/.flake8
+++ /dev/null
@@ -1,4 +0,0 @@
-[flake8]
-# Ignore "and" at start of line.
-ignore = W503
-max-line-length = 120
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 0000000..89189ce
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,37 @@
+name: Check
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    name: ${{ matrix.tox-environment }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        tox-environment:
+          - docs
+          - lint
+
+    env:
+      TOXENV: ${{ matrix.tox-environment }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+
+      - name: Set up system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install gettext
+
+      - name: Install dependencies
+        run: python -m pip install tox
+
+      - name: Run
+        run: tox
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..e0c894e
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,47 @@
+name: Test
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    name: Python ${{ matrix.python-version }} / ${{ matrix.tox-environment }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - 3.6
+          - 3.7
+          - 3.8
+          - 3.9
+          - pypy3
+        tox-environment:
+          # Previous LTS
+          - django22
+          # Latest release
+          - django32
+
+    env:
+      TOXENV: ${{ matrix.tox-environment }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Set up system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install gettext
+
+      - name: Install dependencies
+        run: python -m pip install tox
+
+      - name: Run tests
+        run: tox
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index a0f1b84..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-sudo: false
-language: python
-cache: pip
-
-script:
-  - tox
-
-install:
-  - pip install tox
-
-matrix:
-  include:
-    # LTS
-    - python: "2.7"
-      env: TOXENV=py27-django111
-    - python: "3.4"
-      env: TOXENV=py34-django111
-
-    # Latest
-    - python: "3.4"
-      env: TOXENV=py34-django20
-    - python: "3.5"
-      env: TOXENV=py35-django20
-    - python: "3.6"
-      env: TOXENV=py36-django20
-
-    # Pypy
-    - python: "pypy"
-      env: TOXENV=pypy2-django111
-    - python: "pypy3"
-      env: TOXENV=pypy3-django20
-
-    # Linting
-    - python: "3.6"
-      env: TOXENV=lint
-
-notifications:
-  email: false
-  irc: "irc.freenode.org#xelnext"
diff --git a/LICENSE b/LICENSE
index a6674bd..f860da6 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2011-2013, Raphaël Barrois
+Copyright (c) 2011-2020, Raphaël Barrois
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/MANIFEST.in b/MANIFEST.in
index f138b06..8465f7e 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,14 +1,15 @@
 include CREDITS ChangeLog LICENSE README.rst
-include requirements*.txt
 # Required for 'setup.py build'
 include Makefile
 
 graft django_xworkflows
 
-prune dev
-prune docs
-prune tests
+graft dev
+graft docs
+graft tests
+
+prune docs/_build
 
 global-exclude *.py[cod] __pycache__
 
-exclude tox.ini .flake8 manage.py
+include tox.ini .flake8 manage.py
diff --git a/Makefile b/Makefile
index 9885548..6723111 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,6 @@ DOC_DIR=docs
 # Use current python binary instead of system default.
 COVERAGE = python $(shell which coverage)
 FLAKE8 = flake8
-MANAGE_PY = python manage.py
 DJANGO_ADMIN = django-admin.py
 PO_FILES = $(shell find $(PACKAGE) -name '*.po')
 MO_FILES = $(PO_FILES:.po=.mo)
@@ -36,9 +35,9 @@ build: $(MO_FILES)
 	cd $(abspath $(dir $<)/../../..) && $(DJANGO_ADMIN) compilemessages
 
 # DOC: Install and/or upgrade dependencies
-update:
+setup-dev:
 	pip install --upgrade pip setuptools
-	pip install --upgrade -r requirements_dev.txt
+	pip install --upgrade -e .[dev,doc]
 	pip freeze
 
 
@@ -46,7 +45,7 @@ release:
 	fullrelease
 
 
-.PHONY: all default clean build update release
+.PHONY: all default clean build setup-dev release
 
 
 # Tests and quality
@@ -59,16 +58,16 @@ testall:
 
 # DOC: Run tests for the currently installed version
 test: build
-	PYTHONPATH=. python -Wdefault $(TESTS_DIR)/runner.py
+	python -Werror ./manage.py test tests.djworkflows.tests
 
 
 
 # Note: we run the linter in two runs, because our __init__.py files has specific warnings we want to exclude
 # DOC: Perform code quality tasks
 lint:
-	$(FLAKE8) --config .flake8 --exclude $(PACKAGE)/__init__.py $(PACKAGE)
-	$(FLAKE8) --config .flake8 --ignore F401 $(PACKAGE)/__init__.py
-	$(FLAKE8) --config .flake8 $(TESTS_DIR)
+	$(FLAKE8) --exclude $(PACKAGE)/__init__.py $(PACKAGE)
+	$(FLAKE8) --ignore F401 $(PACKAGE)/__init__.py
+	$(FLAKE8) $(TESTS_DIR)
 	check-manifest
 
 coverage:
diff --git a/dev/settings.py b/dev/settings.py
index 3259098..7c5af89 100644
--- a/dev/settings.py
+++ b/dev/settings.py
@@ -12,6 +12,8 @@
     }
 }
 
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
 # Local time zone for this installation. Choices can be found here:
 # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
 # although not all choices may be available on all operating systems.
@@ -104,7 +106,7 @@
     },
 ]
 
-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
     'django.middleware.common.CommonMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
@@ -112,12 +114,14 @@
     'django.contrib.messages.middleware.MessageMiddleware',
 )
 
-ROOT_URLCONF = 'migration_helper.urls'
+ROOT_URLCONF = 'dev.urls'
 
 INSTALLED_APPS = (
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sites',
+    'tests.djworkflows',
+    'django_xworkflows',
     'django_xworkflows.xworkflow_log',
 )
 
diff --git a/dev/urls.py b/dev/urls.py
index 77c95cd..fb19b8d 100644
--- a/dev/urls.py
+++ b/dev/urls.py
@@ -1,17 +1,6 @@
-from django.conf.urls.defaults import patterns, include, url
 
 # Uncomment the next two lines to enable the admin:
 # from django.contrib import admin
 # admin.autodiscover()
 
-urlpatterns = patterns('',
-    # Examples:
-    # url(r'^$', 'migration_helper.views.home', name='home'),
-    # url(r'^migration_helper/', include('migration_helper.foo.urls')),
-
-    # Uncomment the admin/doc line below to enable admin documentation:
-    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),
-
-    # Uncomment the next line to enable the admin:
-    # url(r'^admin/', include(admin.site.urls)),
-)
+urlpatterns = []
diff --git a/django_xworkflows/__init__.py b/django_xworkflows/__init__.py
index d04b059..ee9e8a5 100644
--- a/django_xworkflows/__init__.py
+++ b/django_xworkflows/__init__.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
-__version__ = '0.12.4.dev0'
+__version__ = '1.0.1.dev0'
 __author__ = 'Raphaël Barrois <raphael.barrois+xworkflows@polytechnique.org>'
diff --git a/django_xworkflows/compat.py b/django_xworkflows/compat.py
deleted file mode 100644
index f30d749..0000000
--- a/django_xworkflows/compat.py
+++ /dev/null
@@ -1,12 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
-# This code is distributed under the two-clause BSD license.
-
-from __future__ import unicode_literals
-
-"""Compatibility helpers."""
-
-
-import sys
-
-is_python2 = (sys.version_info[0] == 2)
diff --git a/django_xworkflows/locale/fr_FR/LC_MESSAGES/django.po b/django_xworkflows/locale/fr_FR/LC_MESSAGES/django.po
index 99b305f..edad0ca 100644
--- a/django_xworkflows/locale/fr_FR/LC_MESSAGES/django.po
+++ b/django_xworkflows/locale/fr_FR/LC_MESSAGES/django.po
@@ -1,5 +1,5 @@
 # Locale for django-xworkflows.
-# Copyright (C) 2011 Raphaël Barrois
+# Copyright (C) 2011-2020 Raphaël Barrois
 # This file is distributed under the same license as the django-xworkflows package.
 # Raphaël Barrois <raphael.barrois@xelmail.com> 2011.
 #
diff --git a/django_xworkflows/management/commands/rebuild_transitionlog_states.py b/django_xworkflows/management/commands/rebuild_transitionlog_states.py
index 513efe7..73a134b 100644
--- a/django_xworkflows/management/commands/rebuild_transitionlog_states.py
+++ b/django_xworkflows/management/commands/rebuild_transitionlog_states.py
@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
-from __future__ import unicode_literals
-
 
 """Rebuild missing from_state/to_state fields on TransitionLog objects."""
 
diff --git a/django_xworkflows/models.py b/django_xworkflows/models.py
index 423f859..a020923 100644
--- a/django_xworkflows/models.py
+++ b/django_xworkflows/models.py
@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
-from __future__ import unicode_literals
-
 """Specific versions of XWorkflows to use with Django."""
 
 from django.apps import apps
@@ -16,9 +14,8 @@
 from django.forms import fields
 from django.forms import widgets
 from django.utils.deconstruct import deconstructible
-from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils import timezone
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from xworkflows import base
 
@@ -249,7 +246,7 @@ class BaseWorkflowEnabled(base.BaseWorkflowEnabled):
     def _get_FIELD_display(self, field):
         if isinstance(field, StateField):
             value = getattr(self, field.attname)
-            return force_text(value.title)
+            return str(value.title)
         else:
             return super(BaseWorkflowEnabled, self)._get_FIELD_display(field)
 
@@ -292,9 +289,7 @@ def get_default_log_model():
 
 class DjangoImplementationWrapper(base.ImplementationWrapper):
     """Restrict execution of transitions within templates"""
-    # django < 1.4
     alters_data = True
-    # django >= 1.4
     do_not_call_in_templates = True
 
 
@@ -423,7 +418,6 @@ def log_transition(self, transition, from_state, instance, *args, **kwargs):
             self.db_log(transition, from_state, instance, *args, **kwargs)
 
 
-@python_2_unicode_compatible
 class BaseTransitionLog(models.Model):
     """Abstract model for a minimal database logging setup.
 
diff --git a/django_xworkflows/xworkflow_log/admin.py b/django_xworkflows/xworkflow_log/admin.py
index 9057ba3..e0d43d4 100644
--- a/django_xworkflows/xworkflow_log/admin.py
+++ b/django_xworkflows/xworkflow_log/admin.py
@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
-from __future__ import unicode_literals
-
 from . import models
 
 from django.contrib import admin
diff --git a/django_xworkflows/xworkflow_log/locale/fr_FR/LC_MESSAGES/django.po b/django_xworkflows/xworkflow_log/locale/fr_FR/LC_MESSAGES/django.po
index 4294120..1952832 100644
--- a/django_xworkflows/xworkflow_log/locale/fr_FR/LC_MESSAGES/django.po
+++ b/django_xworkflows/xworkflow_log/locale/fr_FR/LC_MESSAGES/django.po
@@ -1,5 +1,5 @@
 # Locale for django-xworkflows.
-# Copyright (C) 2011 Raphaël Barrois
+# Copyright (C) 2011-2020 Raphaël Barrois
 # This file is distributed under the same license as the django-xworkflows package.
 # Raphaël Barrois <raphael.barrois@xelmail.com> 2011.
 #
diff --git a/django_xworkflows/xworkflow_log/migrations/0001_initial.py b/django_xworkflows/xworkflow_log/migrations/0001_initial.py
index 328ca9b..ee62e2b 100644
--- a/django_xworkflows/xworkflow_log/migrations/0001_initial.py
+++ b/django_xworkflows/xworkflow_log/migrations/0001_initial.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 # flake8: noqa
-from __future__ import unicode_literals
 
 from django.db import models, migrations
 import django.utils.timezone
@@ -12,7 +11,7 @@
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('contenttypes', '0001_initial'),
+        ('contenttypes', '0002_remove_content_type_name'),
         migrations.swappable_dependency(XWORKFLOWS_USER_MODEL),
     ]
 
diff --git a/django_xworkflows/xworkflow_log/models.py b/django_xworkflows/xworkflow_log/models.py
index 50068ec..55c56f2 100644
--- a/django_xworkflows/xworkflow_log/models.py
+++ b/django_xworkflows/xworkflow_log/models.py
@@ -1,12 +1,10 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
-from __future__ import unicode_literals
-
 from django.conf import settings
 from django.db import models as django_models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from .. import models
 
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 5146250..71e3441 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -1,10 +1,22 @@
 ChangeLog
 =========
 
-0.12.4 (unreleased)
--------------------
+1.0.1 (unreleased)
+------------------
+
+*New:*
+
+    - Test against Django 3.1, 3.2
+    - Test against Python 3.8, 3.9
+
+
+1.0.0 (2020-03-09)
+------------------
+
+*New:*
 
-- Nothing changed yet.
+    - Add compatibility for Django up to 3.0
+    - Drop support for Python 2
 
 
 0.12.3 (2018-02-06)
diff --git a/docs/conf.py b/docs/conf.py
index 7f6e1bb..d830741 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -11,8 +11,6 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-from __future__ import unicode_literals
-
 import sys, os
 
 # If extensions (or modules to document with autodoc) are in another directory,
@@ -43,7 +41,7 @@
 
 # General information about the project.
 project = 'django-xworkflows'
-copyright = '2011-2013, Raphaël Barrois'
+copyright = '2011-2020, Raphaël Barrois'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
diff --git a/docs/index.rst b/docs/index.rst
index f8e7835..6c5a09c 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,7 +1,7 @@
 django-xworkflows documentation
 ===============================
 
-django-xworkflows is a django application adding `xworkflows <http://github.com/rbarrois/xworkflows/>`_ functionnalities to
+django-xworkflows is a django application adding `xworkflows <http://github.com/rbarrois/xworkflows/>`_ functionalities to
 django models.
 
 
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index e18794f..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-# No hard external requirements.
diff --git a/requirements_dev.txt b/requirements_dev.txt
deleted file mode 100644
index bb81b69..0000000
--- a/requirements_dev.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-# Requirements for local development
--e .
--r requirements_test.txt
-
-coverage
-wheel
-tox
-zest.releaser[recommended]
-
-Sphinx
-sphinx_rtd_theme
diff --git a/requirements_test.txt b/requirements_test.txt
deleted file mode 100644
index 35012df..0000000
--- a/requirements_test.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-# Common requirements for running tests
-check_manifest
-flake8
diff --git a/setup.cfg b/setup.cfg
index 2d859ae..8eab186 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,60 @@
+[metadata]
+name = django_xworkflows
+version = 1.0.1.dev0
+description = A Django app enabling Django models to use xworkflows.
+long_description = file: README.rst
+# https://docutils.sourceforge.io/FAQ.html#what-s-the-official-mime-type-for-restructuredtext-data
+long_description_content_type = text/x-rst
+author = Raphaël Barrois
+author_email = raphael.barrois+django_xworkflows@polytechnique.org
+url = https://github.com/rbarrois/django_xworkflows
+keywords = django, workflow, state machine, automaton
+license = BSD
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: Developers
+    License :: OSI Approved :: BSD License
+    Topic :: Software Development :: Libraries :: Python Modules
+    Operating System :: OS Independent
+    Framework :: Django :: 2.2
+    Framework :: Django :: 3.0
+    Framework :: Django :: 3.1
+    Framework :: Django :: 3.2
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+
+[options]
+zip_safe = false
+packages = find:
+include_package_data = true
+python_requires = >=3.4
+install_requires =
+    Django>=1.11
+    xworkflows
+
+[options.packages.find]
+exclude =
+    dev
+    tests*
+
+[options.extras_require]
+dev =
+    # Testing
+    coverage
+    check_manifest
+    flake8
+    tox
+    # Packaging
+    wheel
+    zest.releaser[recommended]
+doc =
+    Sphinx
+    sphinx_rtd_theme
+
 [bdist_wheel]
 universal = true
 
@@ -10,3 +67,8 @@ python-file-with-version = django_xworkflows/__init__.py
 
 [distutils]
 index-servers = pypi
+
+[flake8]
+# Ignore "and" at start of line.
+ignore = W503
+max-line-length = 120
diff --git a/setup.py b/setup.py
index 6bc8210..ef40c3d 100644
--- a/setup.py
+++ b/setup.py
@@ -1,91 +1,24 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
 
-import codecs
-import os
-import re
 import subprocess
-import sys
 
-from setuptools import setup, find_packages
+from setuptools import setup
 from setuptools.command import build_py
 
-root_dir = os.path.abspath(os.path.dirname(__file__))
-
-
-def get_version(package_name):
-    version_re = re.compile(r"^__version__ = [\"']([\w_.-]+)[\"']$")
-    package_components = package_name.split('.')
-    init_path = os.path.join(root_dir, *(package_components + ['__init__.py']))
-    with codecs.open(init_path, 'r', 'utf-8') as f:
-        for line in f:
-            match = version_re.match(line[:-1])
-            if match:
-                return match.groups()[0]
-    return '0.1.0'
-
-
-def clean_readme(fname):
-    """Cleanup README.rst for proper PyPI formatting."""
-    with codecs.open(fname, 'r', 'utf-8') as f:
-        return ''.join(
-            re.sub(r':\w+:`([^`]+?)( <[^<>]+>)?`', r'``\1``', line)
-            for line in f
-            if not (line.startswith('.. currentmodule') or line.startswith('.. toctree'))
-        )
-
 
 class BuildWithMakefile(build_py.build_py):
     """Custom 'build' command that runs 'make build' first."""
     def run(self):
         subprocess.check_call(['make', 'build'])
-        if sys.version_info[0] < 3:
-            # Under Python 2.x, build_py is an old-style class.
-            return build_py.build_py.run(self)
         return super().run()
 
 
-PACKAGE = 'django_xworkflows'
-
-
 setup(
-    name=PACKAGE,
-    version=get_version(PACKAGE),
-    author="Raphaël Barrois",
-    author_email="raphael.barrois+%s@polytechnique.org" % PACKAGE,
-    description="A django app enabling Django models to use xworkflows.",
-    long_description=clean_readme('README.rst'),
-    license="BSD",
-    keywords="django workflow state machine automaton",
-    url="http://github.com/rbarrois/django_xworkflows",
-    download_url="http://pypi.python.org/pypi/django-xworkflows/",
-    packages=find_packages(exclude=['dev', 'tests*']),
-    cmdclass={'build_py': BuildWithMakefile},
-    include_package_data=True,
-    setup_requires=[
-        'setuptools>=0.8',
-    ],
-    install_requires=[
-        'Django',
-        'xworkflows',
-    ],
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Intended Audience :: Developers",
-        "License :: OSI Approved :: BSD License",
-        "Topic :: Software Development :: Libraries :: Python Modules",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-    ],
-    test_suite='tests.runner.runtests',
-    zip_safe=False,  # Prevent distribution as eggs for South.
+    cmdclass=dict(
+        build_py=BuildWithMakefile,
+    ),
 )
diff --git a/tests/demo_project/demo_project/settings.py b/tests/demo_project/demo_project/settings.py
index 4126ede..748f5fb 100644
--- a/tests/demo_project/demo_project/settings.py
+++ b/tests/demo_project/demo_project/settings.py
@@ -41,7 +41,7 @@
     'workflow_app',
 )
 
-MIDDLEWARE_CLASSES = (
+MIDDLEWARE = (
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
@@ -83,6 +83,7 @@
     }
 }
 
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
 
 # Internationalization
 # https://docs.djangoproject.com/en/1.8/topics/i18n/
diff --git a/tests/djworkflows/__init__.py b/tests/djworkflows/__init__.py
index a84a884..68a0855 100644
--- a/tests/djworkflows/__init__.py
+++ b/tests/djworkflows/__init__.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
 
diff --git a/tests/djworkflows/migrations/0001_initial.py b/tests/djworkflows/migrations/0001_initial.py
new file mode 100644
index 0000000..e903e42
--- /dev/null
+++ b/tests/djworkflows/migrations/0001_initial.py
@@ -0,0 +1,117 @@
+# Generated by Django 3.0.4 on 2020-03-09 13:39
+# flake8: noqa
+
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+import django_xworkflows.models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('contenttypes', '0002_remove_content_type_name'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='GenericWorkflowEnabled',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('state', django_xworkflows.models.StateField(max_length=16, workflow=django_xworkflows.models._SerializedWorkflow(initial_state='a', name='GenericWorkflow', states=['a', 'b']))),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(django_xworkflows.models.BaseWorkflowEnabled, models.Model),
+        ),
+        migrations.CreateModel(
+            name='MyWorkflowEnabled',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('state', django_xworkflows.models.StateField(max_length=16, workflow=django_xworkflows.models._SerializedWorkflow(initial_state='foo', name='MyWorkflow', states=['foo', 'bar', 'baz']))),
+                ('other', models.CharField(choices=[('aaa', 'AAA'), ('bbb', 'BBB')], max_length=4)),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(django_xworkflows.models.BaseWorkflowEnabled, models.Model),
+        ),
+        migrations.CreateModel(
+            name='SomeWorkflowEnabled',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('state', django_xworkflows.models.StateField(max_length=16, workflow=django_xworkflows.models._SerializedWorkflow(initial_state='a', name='SomeWorkflow', states=['a', 'b']))),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(django_xworkflows.models.BaseWorkflowEnabled, models.Model),
+        ),
+        migrations.CreateModel(
+            name='WithTwoWorkflows',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('state1', django_xworkflows.models.StateField(max_length=16, workflow=django_xworkflows.models._SerializedWorkflow(initial_state='foo', name='MyWorkflow', states=['foo', 'bar', 'baz']))),
+                ('state2', django_xworkflows.models.StateField(max_length=19, workflow=django_xworkflows.models._SerializedWorkflow(initial_state='a', name='MyAltWorkflow', states=['a', 'b', 'c', 'something_very_long']))),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(django_xworkflows.models.BaseWorkflowEnabled, models.Model),
+        ),
+        migrations.CreateModel(
+            name='SomeWorkflowLastTransitionLog',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('transition', models.CharField(db_index=True, max_length=255, verbose_name='transition')),
+                ('from_state', models.CharField(db_index=True, max_length=255, verbose_name='from state')),
+                ('to_state', models.CharField(db_index=True, max_length=255, verbose_name='to state')),
+                ('timestamp', models.DateTimeField(db_index=True, default=django.utils.timezone.now, verbose_name='performed at')),
+                ('obj', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='djworkflows.SomeWorkflowEnabled')),
+            ],
+            options={
+                'verbose_name': 'XWorkflow last transition log',
+                'verbose_name_plural': 'XWorkflow last transition logs',
+                'abstract': False,
+            },
+        ),
+        migrations.CreateModel(
+            name='GenericWorkflowTransitionLog',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('transition', models.CharField(db_index=True, max_length=255, verbose_name='transition')),
+                ('from_state', models.CharField(db_index=True, max_length=255, verbose_name='from state')),
+                ('to_state', models.CharField(db_index=True, max_length=255, verbose_name='to state')),
+                ('timestamp', models.DateTimeField(db_index=True, default=django.utils.timezone.now, verbose_name='performed at')),
+                ('content_id', models.PositiveIntegerField(blank=True, db_index=True, null=True, verbose_name='Content id')),
+                ('content_type', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='contenttypes.ContentType', verbose_name='Content type')),
+            ],
+            options={
+                'verbose_name': 'XWorkflow transition log',
+                'verbose_name_plural': 'XWorkflow transition logs',
+                'ordering': ('-timestamp', 'transition'),
+                'abstract': False,
+            },
+        ),
+        migrations.CreateModel(
+            name='GenericWorkflowLastTransitionLog',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('transition', models.CharField(db_index=True, max_length=255, verbose_name='transition')),
+                ('from_state', models.CharField(db_index=True, max_length=255, verbose_name='from state')),
+                ('to_state', models.CharField(db_index=True, max_length=255, verbose_name='to state')),
+                ('timestamp', models.DateTimeField(db_index=True, default=django.utils.timezone.now, verbose_name='performed at')),
+                ('content_id', models.PositiveIntegerField(blank=True, db_index=True, null=True, verbose_name='Content id')),
+                ('content_type', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='last_transition_logs', to='contenttypes.ContentType', verbose_name='Content type')),
+            ],
+            options={
+                'verbose_name': 'XWorkflow last transition log',
+                'verbose_name_plural': 'XWorkflow last transition logs',
+                'abstract': False,
+                'unique_together': {('content_type', 'content_id')},
+            },
+        ),
+    ]
diff --git a/tests/djworkflows/migrations/__init__.py b/tests/djworkflows/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/djworkflows/models.py b/tests/djworkflows/models.py
index 4424abf..4d15e1e 100644
--- a/tests/djworkflows/models.py
+++ b/tests/djworkflows/models.py
@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
-from __future__ import unicode_literals
-
 from django.db import models
 import xworkflows
 
@@ -52,11 +50,12 @@ class MyWorkflowEnabled(dxmodels.WorkflowEnabled, models.Model):
     state = dxmodels.StateField(MyWorkflow)
     other = models.CharField(max_length=4, choices=OTHER_CHOICES)
 
+    @xworkflows.after_transition("gobaz")
     def fail_if_fortytwo(self, res, *args, **kwargs):
         if res == 42:
             raise ValueError()
 
-    @dxmodels.transition(after=fail_if_fortytwo)
+    @dxmodels.transition()
     def gobaz(self, foo, save=True):
         return foo * 2
 
diff --git a/tests/djworkflows/tests.py b/tests/djworkflows/tests.py
index 50591e1..36cc9df 100644
--- a/tests/djworkflows/tests.py
+++ b/tests/djworkflows/tests.py
@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
+# Copyright (c) 2011-2020 Raphaël Barrois
 # This code is distributed under the two-clause BSD license.
 
-from __future__ import unicode_literals
-
 import contextlib
 import os
 import re
@@ -28,14 +26,6 @@
 from . import models
 
 
-if sys.version_info[0] <= 2:
-    def text_type(text):
-        return unicode(text)  # noqa: F821
-else:
-    def text_type(text):
-        return str(text)
-
-
 @contextlib.contextmanager
 def extra_pythonpath(pythonpath):
     old_path = os.environ.get('PYTHONPATH')
@@ -250,7 +240,7 @@ def test_logging(self):
         self.assertEqual('foo', trlog.from_state)
         self.assertEqual('bar', trlog.to_state)
 
-        self.assertIn('foo -> bar', text_type(trlog))
+        self.assertIn('foo -> bar', str(trlog))
 
     def test_no_logging(self):
         """Tests disabled transition logs."""
@@ -410,9 +400,9 @@ def step_models(self, step):
         CONDITIONAL_STEP_LINE_RE = r'^.*# step:(\d+,)*{}(,\d+)*$'.format(step)
         with open(self.source_models, 'r') as src:
             lines = [
-                l for l in src
-                if (re.match(CONDITIONAL_STEP_LINE_RE, l.rstrip())
-                    or not re.match(CONDITIONAL_LINE_RE, l.rstrip()))
+                line for line in src
+                if (re.match(CONDITIONAL_STEP_LINE_RE, line.rstrip())
+                    or not re.match(CONDITIONAL_LINE_RE, line.rstrip()))
             ]
 
         if self.debug:
@@ -442,8 +432,8 @@ def test_makemigrations(self):
 class TemplateTestCase(test.TestCase):
     """Tests states and transitions behavior in templates."""
 
-    uTrue = text_type(True)
-    uFalse = text_type(False)
+    uTrue = str(True)
+    uFalse = str(False)
 
     def setUp(self):
         self.obj = models.MyWorkflowEnabled()
@@ -480,11 +470,11 @@ def test_django_magic(self):
         self.assertTrue(self.obj.foobar.do_not_call_in_templates)
 
     def test_transaction_attributes(self):
-        self.assertEqual(self.render_fragment("{{ obj.foobar|safe}}"), text_type(self.obj.foobar))
+        self.assertEqual(self.render_fragment("{{ obj.foobar|safe}}"), str(self.obj.foobar))
         self.assertEqual(self.render_fragment("{{ obj.foobar.is_available }}"), self.uTrue)
         self.assertEqual(models.MyWorkflow.states.foo, self.obj.state)
 
-        self.assertEqual(self.render_fragment("{{ obj.bazbar|safe}}"), text_type(self.obj.bazbar))
+        self.assertEqual(self.render_fragment("{{ obj.bazbar|safe}}"), str(self.obj.bazbar))
         self.assertEqual(self.render_fragment("{{ obj.bazbar.is_available }}"), self.uFalse)
         self.assertEqual(models.MyWorkflow.states.foo, self.obj.state)
 
diff --git a/tests/runner.py b/tests/runner.py
deleted file mode 100644
index 591ddcb..0000000
--- a/tests/runner.py
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-# Copyright (c) 2011-2013 Raphaël Barrois
-# This code is distributed under the two-clause BSD license.
-
-from __future__ import unicode_literals
-
-import sys
-
-import django
-from django.conf import settings
-from django.test.runner import DiscoverRunner as DjangoTestSuiteRunner
-
-
-if not settings.configured:
-    settings.configure(
-        DATABASES={
-            'default': {
-                'ENGINE': 'django.db.backends.sqlite3',
-            }
-        },
-        INSTALLED_APPS=[
-            'django.contrib.auth',
-            'django.contrib.contenttypes',
-            'tests.djworkflows',
-            'django_xworkflows',
-            'django_xworkflows.xworkflow_log',
-        ],
-        MIDDLEWARE_CLASSES=[],
-        TEMPLATES=[{
-            'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        }],
-    )
-
-django.setup()
-
-default_test_args = 'tests.djworkflows.tests'
-
-
-def runtests(*test_args):
-    if not test_args:
-        test_args = [default_test_args]
-    runner = DjangoTestSuiteRunner(failfast=False)
-    failures = runner.run_tests(test_args)
-    sys.exit(failures)
-
-
-if __name__ == '__main__':
-    runtests(*sys.argv[1:])
diff --git a/tox.ini b/tox.ini
index 236cfa3..3720d9c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,25 +1,32 @@
 [tox]
 envlist =
-    py27-django111
-    py{34,35,36}-django{111,20}
-    pypy2-django111
-    pypy3-django{111,20}
+    py{36,37,38,39,py3}-django22
+    py{36,37,38,39,py3}-django30
+    py{36,37,38,39,py3}-django31
+    py{36,37,38,39,py3}-django32
     lint
+    docs
 
 toxworkdir = {env:TOX_WORKDIR:.tox}
 
 [testenv]
+extras = dev
 deps =
-    -rrequirements_test.txt
-    django111: Django>=1.11,<1.12
-    django20: Django>=2.0,<2.1
+    django22: Django>=2.2,<2.3
+    django30: Django>=3.0,<3.1
+    django31: Django>=3.1,<3.2
+    django32: Django>=3.2,<3.3
 
 whitelist_externals = make
 commands = make test
 
 [testenv:lint]
-deps =
-    -rrequirements_test.txt
+extras = dev
 
 whitelist_externals = make
 commands = make lint
+
+[testenv:docs]
+extras = doc
+whitelist_externals = make
+commands = make doc