diff --git a/setup.cfg b/setup.cfg
index dc26ecf..126d585 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,7 +2,7 @@
 universal = 1
 
 [flake8]
-exclude = .tox,colorlog/tests,venv
+exclude = .tox,.venv
 ignore = W503
 max-line-length = 88
 
@@ -10,4 +10,5 @@ max-line-length = 88
 addopts = -p no:logging
 
 [mypy]
+files = colorlog,doc
 ignore_missing_imports = True
diff --git a/tox.ini b/tox.ini
index 79718ae..34dece3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,23 @@
 [tox]
-envlist = py36,py37,py38,py39,py310
+envlist = black,flake8,mypy,py36,py37,py38,py39,py310
 
 [testenv]
 deps = pytest
 commands = pytest -v
+
+[testenv:black]
+deps = black
+commands = black --check colorlog doc
+skip_install = true
+
+[testenv:flake8]
+deps = flake8
+commands = flake8 colorlog doc
+skip_install = true
+
+[testenv:mypy]
+deps =
+  mypy
+  types-PyYAML
+commands = mypy colorlog doc
+skip_install = true