I removed the usage of six, configobj, ply, jquery and jquery.dataTables in the git repository. However, I still cannot remove the use of the local pytest, since astropy doesn't test successfully with the current version in Debian (3.0.5). See also
https://github.com/astropy/astropy/issues/5277 https://github.com/astropy/astropy/issues/5670 Once this is fixed, I will remove that as well. It will be switched off in astropy/tests/helper.py then.
