In Pharo 5, it was possible to do...

TestCase subclass: #Example
....etc

Example >> test1
[ Transcript
crShow: Processor activeProcess priority printString;
tab;
show: Processor activeProcess name.
self halt.
Transcript
crShow: Processor activeProcess effectiveProcess priority printString;
tab;
show: Processor activeProcess effectiveProcess name��
] forkAt: 39 named: 'TEST'.

...and when this was run, a debugger would show for the forked code��
and stepping through it would produce the following output...
39 TEST
39 TEST


In Pharo 71047, no debugger shows up,��
and you only get one...
39 TEST


I guess this because more cleanup of tests is being done,
but it makes it harder to debug multi-threaded tests when��
debugger can't replicate the way the code normally runs.

cheers -ben