diff --git a/.gitignore b/.gitignore
index 66d0c82d..a74bc767 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,14 +11,6 @@ __pycache__/
 # graphviz
 *.gv*
 
-# test outputs
-diagram-*
-diagrams_image
-example_*
-my_custom_name
-test_diagram.py
-test_resources_render
-
 # dist
 dist
 website/build
diff --git a/pyproject.toml b/pyproject.toml
index 903ba270..664d24a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,6 +30,7 @@ dev = [
     "rope~=1.13",
     "isort~=6.0",
     "black~=24.4",
+    "pre-commit~=4.0",
 ]
 
 [tool.hatch.build]