Along with the continuous development of big and complex Web applications such as dotLRN [8], it is mandatory to execute in a scheduled way a set of test cases to assure its functional stability and to make sure that the web application still runs whatever the modifications applied to the implementation. This article highlights the importance of testing and presents the types of test that are needed to assure not just the stability but also the scalability of the dotLRN platform by testing some non-functional aspects. This article presents different methods that can be applied to test in general anyWeb application. Then a methodology to manually develop the test conformance in order to automatically test the regression of the implementation is proposed. Finally this paper presents our proposal to cover the performance and load tests of the dotLRN web application