The Testnet currently does not behave like production because the amendments are still not enabled; the prior reset did not work as intended. The Tesnet is going to be reset again, in order to enable the amendments.
Anyone with tests or scripts that rely on data present on the Testnet ledger should create an automated script that re-creates the test data. If your test finds that the necessary data is not on the ledger, you can re-create it.
Do not rely on the Testnet ledger: the data on it can, and will, be deleted at any time.