DYdX announced that it will close its trading services on the Goerli testnet at 22:00 on December 11th Beijing time and launch dYdX v3 on the Sepolia testnet. All the same features, including the deposit button, will be available and users can access the testnet through the same URL as before. Developers need to update their clients to the latest version. Additionally, this migration only affects the v3 testnet and does not affect the dYdX Chain testnet.