This paper describes the concepts of TEA, a flexible tool that supports user tests by automating repetitive tasks and collecting data of user inputs and actions. TEA was specifically designed for user studies in the World Wide Web and is able to interact with a web browser. Building on a web intermediary (WBI) and a framework for web enhancement tools (SCONE), TEA can be applied in a range of test settings ? providing either a controlled laboratory environment or a quick tool for collecting informal data. Author Keywords WWW, Usability Testing Methods, Test Automation ACM Classification Keywords H5.2 Information interfaces and presentation (e.g. HCI): User Interfaces ? Evaluation/methodology. USER TESTS FOR WEBSITES Costs and effectiveness of usability evaluation methods are of great practical relevance and often the main factors for neglecting tests. This also became evident in the discount usability discussion, focusing on the question of how many users are needed to identify an acc...