Describes what a Web-based language test (WBT) is, how WBTs differ from traditional computer-based tests, and what uses WBTs have in language testing. After a brief review of computer-based testing, WBTs are defined and categorized as low-tech or high tech. Advantages and design and implementation issues of WBTs are considered before examining the role that testing consequences play in deciding whether a WBT is an appropriate assessment instrument. (Author)