[en] The design of a package for the transport or storage of radioactive materials is essentially a simple and logical process, but the nature of the content and the high public awareness of safety issues means the demonstration of design must be both rigorous and extensive. The regulation of the nuclear industry is second to none, and requirements are laid down in the IAEA Transport Regulations which have a major influence in package design and analysis requirements. In particular, the Transport Regulations require certain tests to be carried out to ensure the safety of the package. This paper discusses the tests undertaken in the design of a package for the transport of radioactive materials, and the influence of the design processes on the test requirements. (author)