diff --git a/pyproject.toml b/pyproject.toml
index 40e37ffa..6518dccc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -276,12 +276,27 @@ python =
 install_command = python -I -m pip install --upgrade --upgrade-strategy=eager {opts} {packages}
 deps =
     poetry
+    setuptools
+    mdformat-admon
+    mdformat-beautysh
+    mdformat-footnote
+    mdformat-frontmatter
+    mdformat-gfm
+    mdformat-gfm-alerts
+    mdformat-mkdocs
+    mdformat-shfmt
+    mdformat-simple-breaks
+    mdformat-tables
+    mdformat-toc
+    mdformat-web
+    mdformat-wikilink
 setenv =
     # Skip pre-commit checks that are not needed
     SKIP = file-contents-sorter
 commands_pre =
     python -m poetry install --sync
 commands =
+    !tests: mdformat --check --number --end-of-line keep .
     !tests: pre-commit run --all-files
     pytest -vv -k "not test_docs" --showlocals --cov --junitxml={tox_root}/.results_{envname}/results.xml --cov-report=term --cov-report=xml:{tox_root}/.coverage_{envname}.xml --cov-report=html:{tox_root}/.results_{envname}/html --self-contained-html --html={tox_root}/.results_{envname}/results.html