default: DRIVER=WATIR --no-source --color --format pretty --tags ~@selenium_only
watir: DRIVER=WATIR --no-source --color --format pretty --tags ~@selenium_only
selenium: DRIVER=SELENIUM --no-source --color --format pretty --tags ~@watir_only
autotest: DRIVER=WATIR --no-source --color --format pretty --tags ~@selenium_only