diff --git a/tox.ini b/tox.ini
index a738e33349..69cd121ac1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ passenv = *_proxy *_PROXY
 commands = {posargs}
 
 [testenv:docs]
+basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
   bash -c "rm -rf doc/build"