diff -r 6b3523f81f42 -r 26744ad37953 cubicweb/web/views/boxes.py
--- a/cubicweb/web/views/boxes.py	Fri Apr 05 17:21:14 2019 +0200
+++ b/cubicweb/web/views/boxes.py	Fri Apr 05 17:58:19 2019 +0200
@@ -28,8 +28,6 @@
 
 from cubicweb import _
 
-from six import text_type, add_metaclass
-
 from logilab.mtconverter import xml_escape
 
 from cubicweb import Unauthorized
@@ -212,7 +210,7 @@
 
     @property
     def domid(self):
-        return super(RsetBox, self).domid + text_type(abs(id(self))) + text_type(abs(id(self.cw_rset)))
+        return super(RsetBox, self).domid + str(abs(id(self))) + str(abs(id(self.cw_rset)))
 
     def render_title(self, w):
         w(self.cw_extra_kwargs['title'])