usage: runtest.py [-h] [-i] [-v] [-x] [-s test [test ...]] [-f [FILE]]
                  [-e [MAPFILE]] [-b BRANCH] [--merge_target MERGE_TARGET]
                  [-p PKG] [-w WORK_DIR] [-n NCORES] [-t TEST_PATHS]
                  [-l TEST_LIST] [-c TEST_CONFIG] [-j TEST_GROUP] [-m PMODE]
                  [--bamboo] [-r CACHEDIR] [--ignore_list IGNORE_LIST]
runtest.py: error: argument --merge_target: expected one argument
HAVE_PYTEST: True