diff --git a/tox.ini b/tox.ini
index 9182487..be1679d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,5 +18,7 @@ deps =
   mock<4
   httmock
   xmlschema<1.1
+  pre-commit
 commands =
   py.test {posargs: --junitxml=junit-{envname}.xml tests/}
+  pre-commit run --all-files --show-diff-on-failure