diff --git a/tox.ini b/tox.ini
index 7ac65526..5c038138 100644
--- a/tox.ini
+++ b/tox.ini
@@ -48,7 +48,7 @@ deps =
     ruff
 
 commands =
-    ruff s3upload
+    ruff check s3upload
 
 [testenv:mypy]
 description = Python source code type hints (mypy)