notmuch insert +unmboxed < "${TEST_DIRECTORY}"/corpora/indexing/mbox-attachment.eml
output=$(notmuch count tag:unmboxed)
test_expect_equal "${output}" 1
notmuch insert +unmboxed < "${TEST_DIRECTORY}"/corpora/indexing/mbox-attachment.eml
output=$(notmuch count tag:unmboxed)
test_expect_equal "${output}" 1