Is sendrawtransaction JSON-RPC work?

[zeroFruit]

Is sendrawtransaction JSON-RPC works on testnet?

symtoms

I got 200 success response code with result field of the array with transaction hash. But that transaction hash not shown up Bitcoin explorer: https://www.blockchain.com/, https://blockstream.info/testnet/

And I found the test code of sendrawtransaction with PR

Is this test runs on locally with mocked BTC client? Because I also cannot find transaction hash 34acbc23f60064e0a6e45d9633f5efa5eb068188ff231050fec535d0ccef9107 (this is the result of test code) on Bitcoin explorer.

update
my node is connected with other 10 nodes (with getaddednodeinfo JSON-RPC call)