Tell HN: Default emojis with “test” in the name do not currently work in Slack

I just found this out. If I try to write ":test_tube:" no emoji appears on the preview and the same behaviour is exhibited on both mobile and desktop clients. If I edit an old message with the emoji on it, it is replaced with the textual representation of it.

Seems like someone removed a bit too many test cases from the source. :)