diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000000..2876ddeffe
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,19 @@
+[tox]
+min_version = 4.0
+env_list = unitest,type,dictionaries
+
+[testenv:unitest]
+description = run unit tests
+extras = dev
+commands = pytest --cov=codespell_lib codespell_lib
+
+[testenv:type]
+description = run type checks
+extras = types
+commands = mypy codespell_lib
+
+[testenv:dictionaries]
+description = run dictionary checks
+skip_install = true
+allowlist_externals = make
+commands = make check-dictionaries