The Test Maturity Model integration (TMMi) has a rapidly growing uptake, and is now the de-facto world-wide standard for test process improvement. An overview is provided of the TMMi model, especially TMMi levels 2 and 3 and the way TMMi supports business-driven test process improvement. In addition, the latest developments around the TMMi will be discussed, e.g., TMMi in an Agile context and the result of the world-wide TMMi user survey. The remainder of this halve day tutorial will be spent on how to use and benefit from TMMi as a Test Manager/QA Lead in your project. We will discuss which parts of the TMMi model are especially useful to evaluate and improve your testing practices at project level.