Thank you for taking the time to answer, jeffa.

Apologies, the code was highly work-specific and it felt like it would have taken a long time to create an example test and module without adding anything.

I was interested in the general case of running the standard debugger on any Test::Most (or presumable Test::More or Test::Simple) test script and stopping after a certain test, by number. So I felt that to post code would not necessarily add much helpful info.