diff --git a/tox.ini b/tox.ini
index 8193562c..40d4f927 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,6 +4,7 @@ minversion = 2.0
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
 setenv =
@@ -18,7 +19,6 @@ whitelist_externals = bash
 commands = bash -c "find {toxinidir} -not -wholename \*.tox/\* -and \( -name \*.sh -or -wholename \*.d/\* -and -not -name \*.md -and -not -name \*.rst -and -not -name \*.py \) -print0 | xargs -0 bashate -v"
 
 [testenv:pep8]
-basepython = python3
 setenv =
     ELEMENTS_DIR=elements
 commands =
@@ -39,7 +39,6 @@ builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt