diff --git a/tox.ini b/tox.ini
index 8328bc5..e7e9713 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,7 +25,7 @@ commands=
     core: py.test {posargs:tests/core}
     doctest: make -C {toxinidir}/docs doctest
 basepython =
-    python
+    doctest: python
     py35: python3.5
     py36: python3.6
     pypy3: pypy3
@@ -35,6 +35,7 @@ extras=
 whitelest_externals=make
 
 [testenv:lint]
+basepython=python
 extras=lint
 commands=
   flake8 {toxinidir}/<MODULE_NAME> {toxinidir}/tests