What version of Test::Builder are you running? This sounds like an issue that was fixed in the Test::Simple 0.47 release. From the Changes file:

- Peter Scott made the ending logic not fire on child processes when forking.

I don't see the behaviour you're getting in my version. If you can't update Test::Builder, then calling Test::More->builder->no_ending in the child process should stop the error.

In reply to Re^3: Getting Test::More to ignore forked children by adrianh
in thread Getting Test::More to ignore forked children by diotalevi

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