The purpose of the present document is to provide broad guidelines on the use of a common method for developing test specifications for IPv6. This method is applicable to all IPv6 categories including the core specification@ mobility@ security and transitioning to IPv6 from IPv4. The underlying method is based on the methodologies specified in ISO/IEC 9646-1 [4] for conformance tests and ETSI TS 102 237-1 [1] for interoperability tests. It provides guidance on the development and use of the following key elements of the method: - a Requirements Catalogue (RC); - a Test Suite Structure (TSS) and Test Purposes (TP); - Test Descriptions (TD) - interoperability; - a TTCN-3 library of data types and values@ templates and functions; - an Abstract Test Suite (ATS) - conformance. The method also offers guidance on a naming convention and other style-related issues. Although the present document has been developed primarily for use in the testing of IPv6 standards@ it could equally be used in other areas of protocol test specification.