As the Aspect-Oriented Software Development gains popularity, there is growing interest as developing for existing object-oriented software aspects to address the crosscutting problems of those systems. Existing object-oriented regression test selection techniques select tests that execute a different control flow path for the new program version. However, as aspect-oriented features emerge, the selection becomes imprecise and thus is incapable for analyzing the aspect code. In this position paper, we define a new test selection criterion for aspect-oriented programs to achieve higher precision. This criterion is based on the impact that an aspect may have on the main classes. We present a technique that safely selects tests from the old test suite for testing the new aspect-oriented features. It pre-selects a set of candidate tests based on the differences of control flow paths of two program versions and uses dynamic analysis to re-select the tests from the candidate set based on th...