diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ead9f51..95690ce 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -14,4 +14,4 @@ repos:
     rev: 23.10.0
     hooks:
     -   id: black
-        args: [--config=.\pyproject.toml]
+        args: [--config=./pyproject.toml]
diff --git a/tox.ini b/tox.ini
index b49de4a..397d767 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,7 +43,7 @@ description = Format with black
 skip_install = true
 deps =
     black
-commands = black . --check
+commands = black . --check --diff --color
 
 [testenv:erase]
 description = Erase previous coverage