-find t | grep "\.t$" | grep -v '^t/old' | HARNESS_OPTIONS=j:c xargs perl -Imodules/fallback -MTest::Harness -e 'BEGIN { unshift @INC, "modules/override" } runtests(@ARGV)'
+#!/bin/bash
+
+{
+ if [[ -z $1 ]]; then
+ find t -type f -name '*.t'
+ else
+ echo -- "$@"
+ fi
+} | HARNESS_OPTIONS=j:c xargs perl -X -Imodules/override -MTest::Harness -e 'BEGIN { push @INC, "modules/fallback" } runtests(@ARGV)'