HOME=$MH_TEST_DIR
export HOME
+#### If w3m is used, HOME needs to be set, assuming default w3m config.
+#### So make sure that HOME is set to avoid run-time warning about not
+#### being able to create config directory.
+test -z "$HOME" && HOME=$MH_TEST_DIR
+HOME=$MH_TEST_DIR
+export HOME
+
unset MAILDROP MHBUILD MHCONTEXT MHMTSUSERCONF MHN MHSHOW MHSTORE
-unset MHLDEBUG MHPDEBUG MHWDEBUG PAGER
+unset MHLDEBUG MHPDEBUG MHWDEBUG PAGER XOAUTH
#### Set LC_ALL in individual tests as needed. Unset these so
#### that we don't depend on user's settings in other tests.
unset LANG LC_ALL LC_CTYPE