Unit testing can be hard. It’s made even harder when tests share variables and state leaks between tests. Using SIFERS or Simple Injectable Functions Explicitly Returning State, we can create a setup function that allows us to manage the state of each individual test without worrying about previous tests causing issues. In this talk we will go over the theory behind SIFERS testing, create a few examples to illustrate the concept, and discuss how to start implementing SIFERS in your application. The concepts in this talk are framework agnostic and can be applied to any unit test suite without adding additional app dependencies.