Testnet Stream only working for BTCUSDT

Hy
The Testnet Websocket seems to only stream BTCUSDT. I am working with BTCBUSD and yesterday it was working fine. Now I don’t get any response from the server. I tried other paris to see if it was an isolated case but other pairs like ETHBTC, LTCBTC, BNBBTC, ETHUSDT are not working either.
Could somebody check this please.

It is working. It’s just that the trading volume are low for these pairs which means that you have to wait for some time to see a trade. You can try it for ETHUSDT.