parser.add_argument('--ci',action='store_true',help='Run checks and code that are usually only enabled in a continuous integration environment')
parser.add_argument('--exclude','-x',help='specify a comma-separated-list of scripts to exclude.')
parser.add_argument('--extended',action='store_true',help='run the extended test suite in addition to the basic tests')
parser.add_argument('--force','-f',action='store_true',help='run tests even on platforms where they are disabled by default (e.g. windows).')
parser.add_argument('--help','-h','-?',action='store_true',help='print help text and exit')
parser.add_argument('--jobs','-j',type=int,default=4,help='how many test scripts to run in parallel. Default=4.')
parser.add_argument('--keepcache','-k',action='store_true',help='the default behavior is to flush the cache directory on startup. --keepcache retains the cache from the previous testrun.')