"The naive solution is obviously to run $NCPU+1 tests in parallel. But there is a catch, some of the tests utilize global system resources or state and running

"The naive solution is obviously to run $NCPU+1 tests in parallel. But there is a catch, some of the tests utilize global system resources or state and running two such tests in parallel would lead to false negatives." Couldn't multiple test environments run even these tests in parallel?