diff --git a/.gitignore b/.gitignore
index c9d38a9..bdcbff5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,7 +6,6 @@ __pycache__/
 *.pyc
 .eggs/
 *.egg-info/
-.tox/
 .hypothesis
 
 tmp/
diff --git a/setup.cfg b/setup.cfg
index 0c7a0f5..6301536 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -51,7 +51,7 @@ ignore =
     W503
 max-line-length = 100
 statistics = True
-exclude = venv,build,.tox,.eggs
+exclude = venv,build,.eggs
 
 [mypy]
 ignore_missing_imports = True
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 38ab5c0..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,37 +0,0 @@
-[tox]
-envlist =
-    py36
-    py37
-    py38
-    py39
-    flake8
-    black
-    mypy
-
-[testenv:py36]
-basepython = python3.6
-commands = python -m unittest {posargs}
-
-[testenv:py37]
-basepython = python3.7
-commands = python -m unittest {posargs}
-
-[testenv:py38]
-basepython = python3.8
-commands = python -m unittest {posargs}
-
-[testenv:py39]
-basepython = python3.9
-commands = python -m unittest {posargs}
-
-[testenv:flake8]
-deps = flake8
-commands = flake8 . {posargs}
-
-[testenv:black]
-deps = black
-commands = black --check . {posargs}
-
-[testenv:mypy]
-deps = mypy
-commands = mypy cmaes {posargs}