With DevOps, automated tests have become a crucial necessity. Tests need to be thorough, and their automation should be stable. In fact, tests have to meet quality and robustness criteria that are similar to the application under test, but tests seldom get the attention and investments that the applications get. Where sources and components of applications are considered products that are designed and developed, tests play a mere supporting role. In Scrum projects you will not see tests specified in the backlog. Rather, they are seen as a part of the production for the user stories.