@ Georg Brandl
> I don't think this feature is generally useful enough to be included.
>
> * Since you need to modify the test code anyway (adding the try-except), it is probably just as much work to do the selection there.


You seem to be confusing the feature itself with the implementation.
This feature is generally useful.
The fact that there is an acceptable implementation is another matter (and subtest_in_range.diff is not an implementation).