This chapter summarizes the experience of the Royal Military Academy in testing and evaluating new tools for mine action. It first underscores the importance of testing and evaluating new methods in general and in mine action in particular. Some recommendations are given to help the design of test protocols: defining carefully the objectives of the test and what is to be measured, the importance of blind and double‐blind tests, choosing between realism and statistical relevance, the importance of how to display the results, etc. These recommendations are illustrated by real‐life examples, mainly from test and evaluation of detectors of mines in which RMA has been involved. A test protocol is detailed. It is the one that RMA designed and used to evaluate a detector that was proven to be useless and that led to the criminal conviction of its designer in the United Kingdom. Sources of available test protocols and test reports are also listed.