Thank you, I had not realised failure_output without any args returns the file handle already in use.

On the other issue, it is a combination of Test::More duplicating the handles on load AND the fact it does not copy the IO layers when it duplicates them. As a result, I would not expect setting binmode in BEGIN to help.

In reply to Re^4: How can I enable utf8 layer on Test::More diag output by mje
in thread How can I enable utf8 layer on Test::More diag output by mje

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