diff --git a/tox.ini b/tox.ini
index 0cc9e2333..cb6aa2698 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,12 +14,14 @@ setenv=
   PYTHONPATH = {toxinidir}
 
 [testenv:jjb]
+basepython = python3
 deps =
   jenkins-job-builder==2.5.0
 commands=
   jenkins-jobs test -o job_output -r {posargs:"jjb/"}
 
 [testenv:docs]
+basepython = python3
 deps = -r{toxinidir}/docs/requirements.txt
 commands =
     sphinx-build -b html -n -d {envtmpdir}/doctrees ./docs {toxinidir}/docs/_build/html
@@ -27,5 +29,6 @@ commands =
 whitelist_externals = echo
 
 [testenv:docs-linkcheck]
+basepython = python3
 deps = -r{toxinidir}/docs/requirements.txt
 commands = sphinx-build -b linkcheck -d {envtmpdir}/doctrees ./docs {toxinidir}/docs/_build/linkcheck