On Sep 8, 2016, at 5:34 AM, Arek Bulski <arek.bulski@gmail.com> wrote:

So, why can't you call random.shuffle(all_tests) if you want to run your tests in random order?

I dont randomize test order. People should stop assuming that they know better.
That's the best I could do given the minimal explanation that you provided. 
I need to randomize some arguments for one particular test and I cannot call shuffle between tests.
I still don't understand what you want. 
Its a continous list of declarative tests.
What is "Its"?
Needs to be shuffled().
This sentence would benefit from having a subject. 

No.  Not without further assumptions.
No way to put imperative code between tests.
Maybe you could show how you would write what you want with a "shuffled" function.