the test script when running under -i). Valgrind errors
go to stderr, so you might want to pass the -v option, too.
+ Since it makes no sense to run the tests with --valgrind and
+ not see any output, this option implies --verbose. For
+ convenience, it also implies --tee.
+
--tee::
In addition to printing the test output to the terminal,
write it to files named 't/test-results/$TEST_NAME.out'.