A quick guide
Add tests you have. Pick what you want back. Andesite exchanges them when both sides agree.
Add your tests
Sign in and open Add tests. Paste Google Drive links, one per line, with sharing set to Anyone with the link. Include tests and answer keys you have permission to share. For an unrecognized packet, add tournament details and the tournament website (not the Drive link), and an admin reviews it before it is added. A school's tryout test is welcome too: it trades like any other test and carries a Tryout tag wherever it appears.
Choose your returns
In Preferences, choose the seasons you want and authorize automatic exchanges. In My tests, edit a listing to choose ranked returns or any test from your accepted seasons.
Your tests are listed for you
Once your preferences are set, every verified test you hold is listed, and so is each one you add later. When two listings meet each other's settings, both accounts get access automatically, without another approval. Pause any test whenever you want to keep it out of future matches.
Open what you receive
Received tests appear in My tests. Trades shows your requests and exchanges. Report problems there. Andesite checks links automatically. Use Update link if you move a packet.
Public tests are open without an account. You can also browse the catalog and request a packet, but receiving it still requires a matching active listing.