The purpose of this project is to assess and improve the quality (efficiency and completeness) of current regression tests. It includes the following activities:
 * Automatic test selection in a Build Bot (see [wiki:"SelectiveTestBuildBot"])
 * Selective testing in the Early Warning System (see [wiki:"SelectiveTestEWS"])
 * Extension with top-100 websites using automatic invariant analysis (see [wiki:"Top100Invariant"])
 * Research on isolation of flaky tests and further research topics (see [wiki:"RegressionTestResearch"])

The work is currently being performed by the Department of Software Engineering of the University of Szeged (see [wiki:"Companies and Organizations that have contributed to WebKit"]).