Invalid symbols error on OCO order trade

'https://testnet.binance.vision/api/v3/order/oco?stopLimitTimeInForce=GTC&symbol=XEMUSDT&side=BUY&quantity=10&price=0.1869&stopPrice=0.1877&stopLimitPrice=0.1849&timestamp=1622493743496&signature=18e5d0aa0b954ea2328b2d16036cdb90b5364a242ca9c4e25fd78787c304cbb

returns : code: -1121, and message Error: invallid symbol

Am I doing something wrong ?

XEMUSDT is not a valid symbol on SPOT testnet.

https://testnet.binance.vision/api/v3/exchangeInfo?symbol=XEMUSDT will return an error

Thanks… i see too