To run a single test and get stdout, with proper env config:
python manage.py cms --settings test test contentstore.tests.test_import_nostatic -s
To run a single test and get stdout and get coverage:
python -m coverage run --rcfile=./common/lib/xmodule/.coveragerc which ./manage.py cms --settings test test --traceback --logging-clear-handlers --liveserver=localhost:8000-9000 contentstore.tests.test_import_nostatic -s # cms example
python -m coverage run --rcfile=./lms/.coveragerc which ./manage.py lms --settings test test --traceback --logging-clear-handlers --liveserver=localhost:8000-9000 courseware.tests.test_module_render -s # lms example
coverage html --rcfile=./common/lib/xmodule/.coveragerc
then browse reports/common/lib/xmodule/cover/index.html
Very handy: if you uncomment the `pdb=1` line in `setup.cfg`, it will drop you into pdb on error. This lets you go up and down the stack and see what the values of the variables are. Check out [the pdb documentation](http://docs.python.org/library/pdb.html)