The objective of this qualitative study was to observe and empirically study how software organizations decide on which test cases to select for their software projects. As the software test processes are limited in resources such as time or money, a selection process usually exists for tested features. In this study we conducted a survey on 31 software-producing organizations, and interviewed 36 software professionals from 12 focus organizations to gain a better insight into testing practices. Our findings indicated that the basic approaches to test case selection are usually oriented towards two possible objectives. One is the risk-based selection, where the aim is to focus testing on those parts that are too expensive to fix after launch. The other is design-based selection, where the focus is on ensuring that the software is capable of completing the core operations it was designed to do. These results can then be used to develop testing organizations and to identify better practices for test case selection.