test_begin_subtest "database upgrade from format version 1"
output=$(notmuch new | sed -e 's/^Backing up tags to .*$/Backing up tags to FILENAME/')
test_expect_equal "$output" "\
Welcome to a new version of notmuch! Your database will now be upgraded.
This process is safe to interrupt.
Backing up tags to FILENAME
test_begin_subtest "database upgrade from format version 1"
output=$(notmuch new | sed -e 's/^Backing up tags to .*$/Backing up tags to FILENAME/')
test_expect_equal "$output" "\
Welcome to a new version of notmuch! Your database will now be upgraded.
This process is safe to interrupt.
Backing up tags to FILENAME