diff --git a/tox.ini b/tox.ini
index fbfac02..3ec1157 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@
 envlist = py{36,37,38},flake8,mypy
 
 [testenv]
-commands = {envpython} -m unittest discover --start-directory ./tests
+commands = python -m unittest discover --start-directory ./tests
 
 [testenv:flake8]
 deps =