+start_test 'incompatible locale'
+# Show that LC_CTYPE is sufficient, if LC_ALL is unset.
+unset LC_ALL
+LC_CTYPE=C; export LC_CTYPE
+cat >"$MH_TEST_DIR/test.format" <<EOF
+; Doesn't decode From: or Subject:, to be really sure
+; that character replacement works.
+overflowtext="***",overflowoffset=5
+leftadjust,compwidth=9
+Date:formatfield="%<(nodate{text})%{text}%|%(pretty{text})%>"
+To:
+cc:
+From:
+Subject:
+EOF
+
+run_test "$mhl -form "$MH_TEST_DIR/test.format" `mhpath last`" \
+'Date: 20 May 2014 14:28:51 +0200
+To: recipient??@example.com,
+ recipient2@example.com
+cc: recip--??@example.com
+From: sender--??@example.com
+Subject: Bl??b??rsyltet??y'
+rm -f "$MH_TEST_DIR/test.format"
+
+