diff --git a/tox.ini b/tox.ini
index 6d72c6e..b54f815 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,15 +8,6 @@ minversion = 3.15
envlist = py27,py3{4,5,6,7,8,9},pypy,py{27,38,39}-flake8
[testenv]
-basepython =
- py27: {env:TOXPYTHON:python2.7}
- py34: {env:TOXPYTHON:python3.4}
- py35: {env:TOXPYTHON:python3.5}
- py36: {env:TOXPYTHON:python3.6}
- py37: {env:TOXPYTHON:python3.7}
- py38: {env:TOXPYTHON:python3.8}
- py39: {env:TOXPYTHON:python3.9}
- pypy: {env:TOXPYTHON:pypy}
commands =
{envpython} --version
{envpython} -c "import struct; print(struct.calcsize('P') * 8)"