notmuch tag +usertag1 '*'
-notmuch search '*' | notmuch_search_sanitize > initial-threads
-notmuch search --output=messages '*' > initial-message-ids
+notmuch search '*' 2>1 | notmuch_search_sanitize > initial-threads
+notmuch search --output=messages '*' 2>/dev/null > initial-message-ids
notmuch dump > initial-dump
test_begin_subtest 'reindex preserves threads'