Websockets endopoints for testnet.binance.vision do not respond

Websocket
,
1

Hi,

I am struggling to connect to websockets on the testnet.binance.vision. The websockets work without any problem for binance network, but for development purposes I need to communicate with the sandbox.
According to this documentation: https://testnet.binance.vision/, I should just replace wss://stream.binance.com:9443/ws with wss://testnet.binance.vision/ws and it should work but for some reason it does not, i.e.:

pj@pj-desktop:~$ websocat wss://stream.binance.com:9443/ws/bnbbtc@depth
{"e":"depthUpdate","E":1610292416671,"s":"BNBBTC","U":1184182347,"u":1184182355,"b":[["0.00108960","47.70000000"],["0.00108890","187.28000000"],["0.00108800","1.50000000"],["0.00108790","187.29000000"],["0.00108680","5.44000000"]],"a":[["0.00109130","97.75000000"],["0.00109140","450.50000000"],["0.00109260","1.12000000"]]}
{"e":"depthUpdate","E":1610292418671,"s":"BNBBTC","U":1184182407,"u":1184182437,"b":[["0.00109000","3.64000000"],["0.00108990","9.55000000"],["0.00108920","159.06000000"],["0.00108850","176.13000000"],["0.00108800","502.05000000"],["0.00108740","5.44000000"],["0.00108720","0.00000000"],["0.00108210","8.37000000"],["0.00108190","1.15000000"],["0.00106410","30.19000000"]],"a":[["0.00109040","1.62000000"],["0.00109050","9.31000000"],["0.00109060","0.00000000"],["0.00109160","186.30000000"],["0.00109230","10.60000000"],["0.00109290","121.90000000"]]}
...

pj@pj-desktop:~$ websocat wss://testnet.binance.vision/ws/bnbbtc@depth
<no response, it just hangs>

I have also tried with different tickers but it does not change anything, it looks like the endopoint address is incorrect.

Does anybody know what is the issue here?

2

“bnbbtc” doesn’t have enough liquidity; please try bnbusdt

3

It looks like itr works for bnbusdt:

websocat wss://testnet.binance.vision/ws/bnbusdt@depth
{"e":"depthUpdate","E":1610357900082,"s":"BNBUSDT","U":2654553,"u":2654556,"b":[["39.58690000","2.03000000"]],"a":[["39.60920000","0.00000000"],["39.61170000","1.70000000"]]}
{"e":"depthUpdate","E":1610357901082,"s":"BNBUSDT","U":2654557,"u":2654560,"b":[["39.58740000","2.40000000"],["39.58690000","0.00000000"]],"a":[["39.60260000","0.00000000"]]}
{"e":"depthUpdate","E":1610357902082,"s":"BNBUSDT","U":2654561,"u":2654566,"b":[["39.58740000","0.00000000"],["39.58510000","0.28000000"],["29.82300000","0.00000000"]],"a":[["39.59430000","0.00000000"],["39.61170000","0.00000000"]]}
{"e":"depthUpdate","E":1610357903082,"s":"BNBUSDT","U":2654567,"u":2654568,"b":[["39.56560000","10.78000000"]],"a":[["39.59110000","6.13000000"]]}

Thank you!