diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1a4d90f..ac84864 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -45,6 +45,7 @@ jobs:
         run: |
           ruff -V
           ruff check  --output-format=github nutree tests setup.py
+          ruff format --check nutree tests setup.py
 
       - name: Test with pytest
         run: |
diff --git a/tox.ini b/tox.ini
index ac41178..c713a35 100644
--- a/tox.ini
+++ b/tox.ini
@@ -62,20 +62,7 @@ deps =
 commands =
     ruff -V
     ruff check nutree tests setup.py 
-
-
-; [testenv:check]
-; description = Check Black formatting, isort compliance, and flake8
-; ; skip_install = true
-; deps =
-;     black[jupyter] ~=24.3
-;     isort
-;     {[testenv:lint]deps}
-; changedir = {toxinidir}
-; commands =
-;     isort --check-only --profile black nutree tests setup.py
-;     black --check --diff nutree tests setup.py
-;     {[testenv:lint]commands}
+    ruff format --check nutree tests setup.py 
 
 
 [testenv:format]
@@ -96,23 +83,6 @@ commands =
     ; black nutree tests setup.py
     {[testenv:lint]commands}
 
-; [testenv:format-no-pyupgrade]
-; description = Same a `format` but without pyupgrade, so it runs on windows
-; # skip_install = true
-; deps =
-;     {[testenv:check]deps}
-;     pyupgrade
-; allowlist_externals:
-;     bash
-; changedir = {toxinidir}
-; commands =
-;     ; bash -ec 'pyupgrade --py38-plus --exit-zero-even-if-changed nutree/*.py tests/*.py setup.py'
-;     ruff check --fix nutree tests setup.py 
-;     ; ruff format nutree tests setup.py 
-;     isort --profile black nutree tests setup.py {posargs}
-;     black nutree tests setup.py
-;     {[testenv:lint]commands}
-
 
 [testenv:docs]
 description = Build Sphinx documentation (output directory: docs/sphinx-build)
@@ -122,7 +92,6 @@ deps =
     fabulist
     pydot
     rdflib
-    ; recommonmark
     sphinx
     sphinx_rtd_theme
     myst-parser[linkify]