I decided to place an order but my deposit address is for the test-net only.
Yeah, the BTC side is on the testnet at the moment, I couldn't get the BTE testnet to work, it's giving me some error about the genesis block.
So far as I know, only Bitcoin and Terracoin have testnets. I haven't looked for Litecoin, but I would assume they have one as well. Most other coins, it seems, don't feel the need to have a testnet.