When tests are skipped due to missing prereqs, those prereqs are only
displayed when running with the `--verbose' option.  This is essential
information when troubleshooting, so always send to stdout.
 
 test_check_missing_external_prereqs_ () {
        if test -n "$test_subtest_missing_external_prereqs_"; then
-               say_color skip >&3 "missing prerequisites:"
-               echo "$test_subtest_missing_external_prereqs_" >&3
+               say_color skip >&1 "missing prerequisites:"
+               echo "$test_subtest_missing_external_prereqs_" >&1
                test_report_skip_ "$@"
        else
                false