diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..8d79b7e
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,6 @@
+[flake8]
+# E203: whitespaces before ':' <https://github.com/psf/black/issues/315>
+# E231: missing whitespace after ','
+# W503: line break before binary operator <https://github.com/psf/black/issues/52>
+ignore = E203,E231,W503
+max-line-length = 88
diff --git a/tox.ini b/tox.ini
index 7010ca3..041cd4a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,27 +1,34 @@
 [tox]
-envlist=flake8,mypy,py3
+envlist=black,flake8,mypy,py3
 
 [testenv:py3]
 deps =
   .[testing]
   pytest-cov
 commands =
   pytest --doctest-modules \
          {envsitepackagesdir}/swh/icinga_plugins \
          --cov={envsitepackagesdir}/swh/icinga_plugins \
          --cov-branch {posargs}
 
+[testenv:black]
+skip_install = true
+deps =
+  black
+commands =
+  {envpython} -m black --check swh
+
 [testenv:flake8]
 skip_install = true
 deps =
   flake8
 commands =
   {envpython} -m flake8
 
 [testenv:mypy]
 skip_install = true
 deps =
   .[testing]
   mypy
 commands =
   mypy swh