Wallet is already running more than 1.5 hours and still no signs of mined coins

{
  "blocks": 5811,
  "currentblocksize": 1932,
  "currentblocktx": 3,
  "difficulty": 13.99374421339739,
  "errors": "This is a pre-release test build - use at your own risk - do not use for staking or merchant applications!",
  "genproclimit": 8,
  "networkhashps": 810472360,
  "pooledtx": 3,
  "testnet": false,
  "chain": "main",
  "generate": true,
  "hashespersec": 1350438
}