diff --git a/tox.ini b/tox.ini
index a6ea53cd..b0b2a1a9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,6 @@ minversion = 2.0
 envlist = py35,py27,pep8
 
 [testenv]
-basepython = python3
 setenv =
     VIRTUAL_ENV={envdir}
     BRANCH_NAME=master
@@ -15,10 +14,8 @@ commands =
   python setup.py test --coverage --coverage-package-name=oslo_log --slowest --testr-args='{posargs}'
   coverage report --show-missing
 
-[testenv:py27]
-basepython = python2.7
-
 [testenv:pep8]
+basepython = python3
 commands =
   flake8
   # Run security linter
@@ -28,14 +25,17 @@ commands =
 commands = {posargs}
 
 [testenv:docs]
+basepython = python3
 commands = python setup.py build_sphinx
 
 [testenv:cover]
+basepython = python3
 commands =
   python setup.py test --coverage --coverage-package-name=oslo_log --testr-args='{posargs}'
   coverage report --show-missing
 
 [testenv:bandit]
+basepython = python3
 commands = bandit -r oslo_log -x tests -n5
 
 [flake8]
@@ -49,10 +49,11 @@ exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build,__init__.py
 import_exceptions = oslo_log._i18n
 
 [testenv:releasenotes]
+basepython = python3
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
-
 [testenv:lower-constraints]
+basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt