+test_begin_subtest "Bad utf8 reported as error"
+cp initial-config bad-config
+printf '[query]\nq3=from:\xff\n' >>bad-config
+test_expect_code 1 "notmuch --config=./bad-config config list"
+
+test_begin_subtest "Specific error message about bad utf8"
+notmuch --config=./bad-config config list 2>ERRORS
+cat <<EOF > EXPECTED
+GLib: Key file contains key “q3” with value “from:�” which is not UTF-8
+Error: unable to load config file.
+EOF
+test_expect_equal_file EXPECTED ERRORS
+