--- a/tox.ini	Fri Apr 05 17:21:14 2019 +0200
+++ b/tox.ini	Fri Apr 05 17:58:19 2019 +0200
@@ -1,12 +1,12 @@
 [tox]
 envlist =
   check-manifest,flake8,
-  py{27,3}-{server,web,misc}
+  py3-{server,web,misc}
 
 [testenv]
+basepython=python3
 deps =
   -r{toxinidir}/requirements/dev.txt
-  py27: backports.tempfile
   misc: -r{toxinidir}/requirements/test-misc.txt
   server: -r{toxinidir}/requirements/test-server.txt
   web: -r{toxinidir}/requirements/test-web.txt
@@ -17,7 +17,6 @@
   web: {envpython} -m pytest {posargs} {toxinidir}/cubicweb/web/test
 
 [testenv:flake8]
-basepython=python3
 skip_install = true
 deps =
   flake8 >= 3.6