An effective testing strategy plays a quintessential role in the quality and overall success of any project. This is true in portal scenario as well. The portal platform addresses multiple concerns and is a composition of multiple technologies and integration with varied systems. This warrants a robust as well as multidimensional testing that can effectively test all portal usage scenarios. The portal testing complexity further increases due to the numerous delivery channels and vast diversity in the end user environments. Just because a portal system works fine in a controlled quality assurance (QA) environment, it does not necessarily imply that the end user will experience the same. There could be many variations between the QA environment and the end user environment and there could be multiple layers in the delivery pipeline that could impact the end user experience. The key motive of this chapter is to explore portal testing from these dimensions and see how the gap between experience at the testing environment and the end user environment can be minimized.