Systems and methods to dynamically allocate resources in product test automation. In a testing lab, multiple tests are run on multiple machines to test multiple products, where each product has an initial priority. A test distributor calculates, for each product, a specific number of machines on which that product is to be tested based on the initial priority of that product; determines a number of remaining machines not being used in testing; determines one or more products being tested that need one or more additional machines for testing; and determines, for each product identified as needing one or more additional machines for testing, a number of machines to be allocated to run the tests for that product.