After seven years of working as an embedded systems tester for various devices in automotive and industrial automation areas, I thought about summarizing some of my experiences in this field. This isn’t by any chance a complete or exhaustive list of items, though it comes from many different test campaigns that I took part in or led. During this time, I also researched the subject vigorously trying to learn and implement good practices to the process. These experiences have equipped me with insights and lessons that have shaped my perspective on the art and science of testing. However, the field is so vast and continually evolving that I still continue to encounter surprising facets.