--- /dev/null
+#!/usr/bin/env bash
+
+test_description="command line arguments"
+. ./test-lib.sh || exit 1
+
+NOTMUCH_NEW > /dev/null
+
+test_begin_subtest 'bad option to show'
+notmuch show --frobnicate >& OUTPUT
+cat <<EOF > EXPECTED
+Unrecognized option: --frobnicate
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_done