test failures only visible when lxml is installed
there are quite some converter test failures that only show when lxml is installed into the virtualenv. usually it is some xpath-based test failing.
our quickinstall script does not install lxml this, due to the issues often seen when installing lxml fails due to missing compiler / header files / due to header files not found at the expected place.
this bug is just a reminder that the failures need to get fixed as they more or less block other global work that should have working tests.