How to create Binance test API key
Try this : https://testnet.binance.vision/ Sign in with github and then press Generate HMAC_SHA256 Key
For futures testnet, register and login here: https://testnet.binancefuture.com/
You will see "API KEYS" tab in the panel just below the main chart panel
(the other tabs in this panel are: Positions(0) / Open Orders(0) / Order History / Trade History / Transaction History / Assets / and, finally, API Key)
I hope this will save your time