Provide a way to control the randomiser

[Altreus]

Test methods within a class are called in a random order, to help avoid tests accidentally depending on side-effects of other test methods.

This is great, except that sometimes, there is a problem in the random order of the tests, and I'd like to debug it.

Can we please have a way of specifying the order? You can specify a seed, but finding a seed that happens to run the tests in the right order is not really an efficient way of doing it, especially if you're changing the tests.