: The increased usage of Web services for critical applications introduces a growing need for efficient testing approaches to assure their quality. The Testing and Test Control Notation (TTCN-3) is a standardised testing language that is well suited for black-box testing of distributed systems such as Web services. Also due to ract test specification methodology, it allows easy adaptation to different Web service frameworks or platforms. This paper presents a mapping from the Web Service Description Language (WSDL) to TTCN-3 and a corresponding automated translator.