Examples described relate to examples for testing a computer program. In an example, a first set of factors to be considered in a first test plan for testing a computer program may be selected. A first set of test data may be assigned to the first set of factors. A first test may be performed on the computer program, based on the first set of factors, considering the first set of test data. The first test results obtained in response to performing the first test on the computer program may be analyzed. In response to analyzing the first test results, at least one of the first test plan, the first set of factors, and the first set of test data for testing the computer program may be updated.