Run 'pester' in the directory that you want to watch for changes.
Pest will look for a custom 'runtests' script, then a django 'manage.py' script, then will assume the nosetest runner. You can manage more then one directory as well. If no test runners are found, pest will look for a test runner under each directory in 'src' if it is found. For a directory under 'src', say 'dir1', pest will look for a test runner in 'src/dir1/dir1', then in 'src/dir1'.