start_test 'incompatible locale'
# Show that LC_CTYPE is sufficient, if LC_ALL is unset.
unset LC_ALL
-LC_CTYPE=C
+LC_CTYPE=C; export LC_CTYPE
cat >"$MH_TEST_DIR/test.format" <<EOF
; Doesn't decode From: or Subject:, to be really sure
; that character replacement works.