diff -r 9a78d50a1ff6 -r 4443ae7c9a2d cubicweb/skeleton/tox.ini.tmpl
--- a/cubicweb/skeleton/tox.ini.tmpl	Tue Jan 29 14:02:19 2019 +0100
+++ b/cubicweb/skeleton/tox.ini.tmpl	Tue Jan 29 14:04:28 2019 +0100
@@ -8,6 +8,7 @@
   {envpython} -m pytest {posargs:test}
 
 [testenv:flake8]
+basepython = python3
 skip_install = true
 deps =
   flake8