diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..6ad2ff9
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,7 @@
+#
+# Move to pyproject.toml after: https://gitlab.com/pycqa/flake8/-/issues/428
+#
+[flake8]
+exclude = .pytest_cache, .tox, dist, htmlcov, local_test
+ignore = F405
+max-line-length = 119
diff --git a/.gitignore b/.gitignore
index d18d5cc..d4aff27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,10 @@
 .*
 !.github
 !.editorconfig
+!.flake8
 !.gitignore
 __pycache__
 secret.txt
 /local_test/
-/poetry.lock
+/coverage.xml
+/htmlcov/
diff --git a/Makefile b/Makefile
index 2edd58a..3692cc4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 SHELL := /bin/bash
+MAX_LINE_LENGTH := 119
 
 all: help
 
@@ -16,16 +17,38 @@ check-poetry:
 	fi
 
 install-poetry:  ## install or update poetry
+	pip3 install -U pip
 	pip3 install -U poetry
 
 install: check-poetry  ## install project via poetry
 	poetry install
 
-update: install-poetry  ## update the sources and installation
+update: install-poetry  ## update the sources and installation and generate "conf/requirements.txt"
+	poetry run pip install -U pip
 	poetry update
+	poetry export -f requirements.txt --output conf/requirements.txt
 
-local-test: check-poetry  ## Run local_test.py to run the project locally
-	poetry run ./local_test.py
+lint: ## Run code formatters and linter
+	poetry run flynt --fail-on-change --line_length=${MAX_LINE_LENGTH} .
+	poetry run isort --check-only .
+	poetry run flake8 .
+
+fix-code-style: ## Fix code formatting
+	poetry run flynt --line_length=${MAX_LINE_LENGTH} .
+	poetry run black --verbose --safe --line-length=${MAX_LINE_LENGTH} --skip-string-normalization .
+	poetry run isort .
+
+tox-listenvs: check-poetry ## List all tox test environments
+	poetry run tox --listenvs
+
+tox: check-poetry ## Run pytest via tox with all environments
+	poetry run tox
+
+pytest: install  ## Run pytest
+	poetry run python3 ./run_pytest.py
+
+local-test: install  ## Run local_test.py to run the project locally
+	poetry run python3 ./local_test.py
 
 local-diff-settings:  ## Run "manage.py diffsettings" with local test
 	poetry run python3 local_test/opt_yunohost/manage.py diffsettings
diff --git a/README.md b/README.md
index 8a13efb..4c58880 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ You can edit the file `$final_path/local_settings.py` to enable or disable featu
 
 ## SSO authentication
 
-[SSOwat](https://github.com/YunoHost/SSOwat) is fully supported:
+[SSOwat](https://github.com/YunoHost/SSOwat) is fully supported via [django_ynh](https://github.com/YunoHost-Apps/django_ynh):
 
 * First user (`$YNH_APP_ARG_ADMIN`) will be created as Django's super user
 * All new users will be created as normal users
diff --git a/pyproject.toml b/pyproject.toml
index 4d17b07..357acab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,8 +8,20 @@ license = "GPL"
 [tool.poetry.dependencies]
 python = ">=3.7,<4.0.0"
 django-for-runners = "*"
+django_ynh = "*"
 
 [tool.poetry.dev-dependencies]
+bx_py_utils = "*"
+tox = "*"
+pytest = "*"
+pytest-cov = "*"
+pytest-django = "*"
+coveralls = "*"
+isort = "*"
+flake8 = "*"
+flynt = "*"
+black = "*"
+pyupgrade = "*"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]