This time we decided to start a little larger project that we will work on over several dojos. This lead to more design discussions and less coding than usual but hopefully it'll pay off the next time. Interestingly enough we did one mistake that I think is common when doing TDD; focus too much on low level details. In the retrospect we decided to continue next time by adding more tests at a higher abstraction level. That will hopefully help us make better design decisions than starting with the smallest building blocks which was what happened today.
And if you wonder what the big project is? Something inspired by CRobots but written in C#.