-test_begin_subtest "Support single-message mbox (deprecated)"
-cat > "${MAIL_DIR}"/mbox_file1 <<EOF
-From test_suite@notmuchmail.org Fri Jan 5 15:43:57 2001
-From: Notmuch Test Suite <test_suite@notmuchmail.org>
-To: Notmuch Test Suite <test_suite@notmuchmail.org>
-Subject: Test mbox message 1
-
-Body.
-EOF
-output=$(NOTMUCH_NEW 2>&1)
-test_expect_equal "$output" \
-"Warning: ${MAIL_DIR}/mbox_file1 is an mbox containing a single message,
-likely caused by misconfigured mail delivery. Support for single-message
-mboxes is deprecated and may be removed in the future.
-Added 1 new message to the database."
-