For Cardano chain, the following list of tokens are supported in testnet environment.

Testnet

Token Name	Symbol	Native Coin	Token Address
Testtoken	Testtoken	ADA	bfc7197e735d2748024be222ed510a23d8682e9f912769e6d922a276
SecondTesttoken	SecondTesttoken	ADA	bfc7197e735d2748024be222ed510a23d8682e9f912769e6d922a276
Test token 1	TT1	ADA	24b908240b5d1c5d477d443630539793ba9454cb4b9db1df01741b81
Nikel	Nikel	ADA	44096c7a6386b0614b22f2ca9e600bc418907b2fe6f4afc89b336b95

To add new tokens, raise a support ticket as directed in the Add new tokens guide.