diff --git a/tox.ini b/tox.ini
index 01e27fc1..fab56784 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,6 +10,7 @@ deps = -r{toxinidir}/test-requirements.txt
 passenv = GENERATE_GRENADE_PLUGIN_LIST
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:bashate]
@@ -17,6 +18,7 @@ commands =
   bash -c "ls *.sh prep-* stop-* upgrade-* from-*/upgrade-* functions | xargs bashate -v {posargs}"
 
 [testenv:docs]
+basepython = python3
 whitelist_externals = bash
 setenv =
   TOP_DIR={toxinidir}