Return on Investment: Mobile test automation saves time and money. Tests are typically repeated often during development cycles to ensure quality. Each time source code or the operating system is upgraded, the modified software tests should be repeated. Doing so manually is time-consuming and costly. But with test automation, we can run tests over and over again, as needed, at no additional cost — and much faster. To illustrate the speed that can be realized, consider the following example: Typically, 1 manual tester can test 50 scenarios in an 8-hour day. Using a 1000-test-regression-set, the tests can be completed in less than a day. Without automation, it would take days.