Documentation Request: How to get a waveform from PeekPokeTester?

[ccelio]

https://github.com/freechipsproject/chisel-testers/wiki/Using%20the%20PeekPokeTester

I've been reading the above documentation and it's not obvious to me how to use the verilator backend instead of the firrtl interpreter backend and how to get a vcd file from the simulation.

(Same for HardwareIOTester).

[chick]

I have "Things are still not working, more information needed" Section to the referenced document and smaller entry in the FAQ