+export MH_TEST_COMMON=$PWD/common.sh
+
+#### Some tests use mhshow to display headers. It relies on mhl's
+#### default mhl.headers, which runs the date through the pretty
+#### function. That displays the date with the user's current
+#### timezone. All of the tests expect GMT, so fool them into using
+#### that.
+export TZ=GMT
+
+[ -d $MH_TEST_DIR ] || ./setup-test