-#### 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=$MH_TEST_DIR
-export HOME
-
-#### If w3m is used, HOME needs to be set, assuming default w3m config.
-#### So make sure that HOME is set to avoid run-time warning about not
-#### being able to create config directory.
-test -z "$HOME" && HOME=$MH_TEST_DIR
-HOME=$MH_TEST_DIR
+#### Make sure that HOME is set to avoid run-time warning from w3m about
+#### not being able to create config directory.
+HOME="$MH_TEST_DIR"