diff --git a/tox.ini b/tox.ini
index 864b989..f1c95c5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,12 +12,15 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:docs]
+basepython = python3
 commands = python setup.py build_sphinx
 
 [testenv:pep8]
+basepython = python3
 description = Runs set of linters against codebase (checkniceness)
 commands = {[testenv:checkniceness]commands}