create the nodes file in a 'test' subdirectory and not the current directory

create the nodes file in a 'test' subdirectory and not the current directory

delete all persistent databases when the test starts
(the tests only uses test databases in a special test directory)

do not set up any public addresses in the tests

wait until there are no disconnected or unhealthy nodes when starting the
test daemons instead of waiting for the recovery mode to change.
we do want to wait until the system has recovered and ALL nodes are ok.