A computer system, method and computer program product for automatically converting, through automating-test-automation software, a manual test case representation (in a natural language), for testing a target software, into a machine-readable test case representation. In preferred embodiments, the machine-readable test case is in the form of a keyword-based test case that is made from action-target-data tuples. The automation-test-software uses a methodical process of trial-and-error to resolve ambiguities that are generally present (and generally resolvable by humans) in the manual test case representation.