order_market_buy(), easy problem

Hello fellows, i am an API-newbie and have got an easy problem:

client = Client(api_key, api_secret)
client.API_URL = 'https://testnet.binance.vision/api'

print("BTCUSDT-balance:", client.get_asset_balance('BTCUSDT'))
print("USDT-balance:", client.get_asset_balance('USDT')['free'])

order = client.order_market_buy(
    symbol='BTCUSDT',
    quantity=0.10000)

print(client.get_open_orders(symbol='BTCUSDT'))
print(client.get_all_orders(symbol='BTCUSDT'))
print("BTCUSDT-balance:", client.get_asset_balance('BTCUSDT'))
print("USDT-balance:", client.get_asset_balance('USDT')['free'])

This dumps me:

BTCUSDT-balance: None
USDT-balance: 10000.00000000

[{
‘symbol’: ‘BTCUSDT’,
‘orderId’: 44499,
‘orderListId’: -1,
‘clientOrderId’: ‘meG93IF7eLlkMPaccBgL4o’,
‘price’: ‘0.00000000’,
‘origQty’: ‘0.10000000’,
‘executedQty’: ‘0.00000000’,
‘cummulativeQuoteQty’: ‘0.00000000’,
‘status’: ‘EXPIRED’,
‘timeInForce’: ‘GTC’,
‘type’: ‘MARKET’,
‘side’: ‘BUY’,
‘stopPrice’: ‘0.00000000’,
‘icebergQty’: ‘0.00000000’,
‘time’: 1615543607027,
‘updateTime’: 1615543607027,
‘isWorking’: True,
‘origQuoteOrderQty’: ‘0.00000000’
}]
BTCUSDT-balance: None
USDT-balance: 10000.00000000

Something should change, but after buying, everything same. What is the/my fault?

Try different symbol like BNBUSDT. BTCUSDT doesn’t have liquidity in testnet

Well, that was (too) easy. thanks.