Why is testnet prices of assets, like BTC, different from live prices?

When using the testnet and retrieving a price from an asset - such as BTC - the price (10.6k) is way off the original price (26.7k). Why is this?
Is there a setting I can set to get the original prices?

there is not enough liquidity on testnet, please try symbol BNBUSDT, which has more open orders.