The reference to the question is unclear. However, assuming that the question is asking to "test nostr" by using the hashtag "#[2]", it seems to be a reference to a note or message on the Nostr social network. The note or message may contain instructions or information related to using or testing the Nostr platform. The hashtag "#[2]" may be a reference to a specific topic or category related to the note or message. To fully understand the topic and instructions, it would be necessary to review the contents of the note or message.