diff --git a/tox.ini b/tox.ini
index ea6af8f..30cb77a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,3 +22,4 @@ commands =
     # TODO: Add the tests/ folder back to pylint
     pylint --rcfile={toxinidir}/.pylintrc libp2p examples
     mypy -p libp2p -p examples --config-file {toxinidir}/mypy.ini
+    black --check examples libp2p/__init__.py libp2p/host libp2p/kademlia libp2p/network libp2p/peer libp2p/protocol_muxer libp2p/pubsub/*.py libp2p/routing libp2p/security libp2p/stream_muxer libp2p/transport tests setup.py