+if ! ${TEST_DIRECTORY}/have-compact; then
+ test_begin_subtest "Compact unsupported: error message"
+ output=$(notmuch compact --quiet 2>&1)
+ test_expect_equal "$output" "notmuch was compiled against a xapian version lacking compaction support.
+Compaction failed: Unsupported operation"
+
+ test_expect_code 1 "Compact unsupported: status code" "notmuch compact"
+
+ test_done
+fi
+