Flatten test namespaces

Forgive this silly PR but this has annoyed me for a while: clickety-clickety-clickety-click
This flattens the namespaces of our MD tests, because the tooling is not all that good.
![clickety](https://cloud.githubusercontent.com/assets/445888/3577965/f9f9099c-0ba2-11e4-9127-f2449120de8f.gif)