as per the qarun manual 'getting started guide' it states that :
'A complete test suite contains many individual tests, executed at different points (test sites) within the target application. The tests are invoked by the controlling script, called a driver script.
Driver scripts are built the same way as test scripts are, but the driver does not actually test the target application. It merely “drives” the target system to the proper point to begin a test (called a test site) and then calls one or more test scripts to begin testing at that test site. When the test finishes, the driver regains control and proceeds to the next test site'.