\fpart{ ID: 4, Content-type: text/plain
 This is a test encrypted message.
 \fpart}
-\fattachment{ ID: 5, Content-type: application/octet-stream
-Attachment: TESTATTACHMENT (application/octet-stream)
+\fattachment{ ID: 5, Filename: TESTATTACHMENT, Content-type: application/octet-stream
 Non-text part: application/octet-stream
 \fattachment}
 \fpart}
 
 Non-text part: text/html
 \fpart}
 \fpart}
-\fattachment{ ID: 5, Content-type: text/plain
-Attachment: attachment (text/plain)
+\fattachment{ ID: 5, Filename: attachment, Content-type: text/plain
 This is a text attachment.
 \fattachment}
 \fpart{ ID: 6, Content-type: text/plain
 Non-text part: text/html
 \fpart}
 \fpart}
-\fattachment{ ID: 5, Content-type: text/plain
-Attachment: attachment (text/plain)
+\fattachment{ ID: 5, Filename: attachment, Content-type: text/plain
 This is a text attachment.
 \fattachment}
 \fpart{ ID: 6, Content-type: text/plain
 Non-text part: text/html
 \fpart}
 \fpart}
-\fattachment{ ID: 5, Content-type: text/plain
-Attachment: attachment (text/plain)
+\fattachment{ ID: 5, Filename: attachment, Content-type: text/plain
 This is a text attachment.
 \fattachment}
 \fpart{ ID: 6, Content-type: text/plain
 test_begin_subtest "--format=text --part=5, inline attachment"
 notmuch show --format=text --part=5 'id:87liy5ap00.fsf@yoom.home.cworth.org' >OUTPUT
 cat <<EOF >EXPECTED
-\fattachment{ ID: 5, Content-type: text/plain
-Attachment: attachment (text/plain)
+\fattachment{ ID: 5, Filename: attachment, Content-type: text/plain
 This is a text attachment.
 \fattachment}
 EOF