Since manual black-box testing of GUI-based APplications (GAPs) is tedious and laborious, test engineers create test scripts to automate the testing process. These test scripts interact with GAPs by performing actions on their GUI objects. An extra effort that test engineers put in writing test scripts is paid off when these scripts are run repeatedly. Unfortunately, releasing new versions of GAPs breaks their corresponding test scripts thereby obliterating benefits of test automation. We propose a tool called Reducing Effort in Script-based Testing (REST) for guiding test personnel through changes in test scripts so that they can use these modified scripts to test new versions of their respective GAPs. During demonstration of REST we will show how this tool enables test personnel to maintain and evolve test scripts with a high degree of automation and precision. Categories and Subject Descriptors D.2.5 [Testing and Debugging]: Testing tools General Terms Test scripts, test autom...