diff --git a/tox.ini b/tox.ini
index 1b050be..590d504 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ skip_install = true
 deps =
     -r requirements/test.txt
 commands =
+    ruff format . --check {posargs}
     ruff check . {posargs}
 
 [testenv:check-security]