On master I'm getting this:

keypool.py | False | 0 s
p2p-fullblocktest.py | True | 180 s
prioritise_transaction.py | False | 0 s

every time I run rpc tests batched with multiple threads(and sometimes with 1), certain tests basically fail to start:
Unexpected exception caught during testing: Exception('bitcoind exited with status 1 during initialization',)

Running them individually allows them to pass. This is making it annoying to test changes locally. I have not been able to reproduce this on another machine since I don't have access to another one at the moment.

This is on a fairly beefy Intel NUC.