+ default=os.environ.get('TEST_CASE', 'fault_management'),
+ choices=['all', 'fault_management', 'maintenance'],
+ help="A name of test case to be executed,"
+ " choices are 'all', 'fault_management' or 'maintenance'."
+ " Set 'all' to execute all the test cases existing in"
+ " this repo. Default is 'fault_management'. Another test"
+ " case can be specified only if a function named"
+ " test_<test_case>() was implemented in DoctorTest.",