diff -r 6b3523f81f42 -r 26744ad37953 cubicweb/devtools/qunit.py
--- a/cubicweb/devtools/qunit.py	Fri Apr 05 17:21:14 2019 +0200
+++ b/cubicweb/devtools/qunit.py	Fri Apr 05 17:58:19 2019 +0200
@@ -15,16 +15,13 @@
 #
 # You should have received a copy of the GNU Lesser General Public License along
 # with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
-from __future__ import absolute_import, print_function
-
 import os, os.path as osp
 import errno
 import shutil
-from tempfile import mkdtemp
+from queue import Queue, Empty
+from tempfile import mkdtemp, TemporaryDirectory
 from subprocess import Popen, PIPE, STDOUT
 
-from six.moves.queue import Queue, Empty
-
 # imported by default to simplify further import statements
 from logilab.common.testlib import Tags
 import webtest.http
@@ -34,7 +31,6 @@
 from cubicweb.web.controller import Controller
 from cubicweb.web.views.staticcontrollers import StaticFileController, STATIC_CONTROLLERS
 from cubicweb.devtools import webtest as cwwebtest
-from cubicweb.devtools.testlib import TemporaryDirectory
 
 
 class FirefoxHelper(object):