The onchain tests are supposed to run on a forked chains - mainnet or testnet.

set ACC_QTY node env var to 20 before running hardhat node:

export ACC_QTY=20 && npx hardhat node ... 

npx hardhat node --fork https://mainnet-dev.sovryn.app/rpc --no-deploy --fork-block-number 5103312

where --fork-block-number is optional - use to time travel back to a needed state

npx hardhat test tests-onchain/test-file-name.js --network X

where X: either rskForkedMainnet or rskForkedTestnet use an ad-hoc rskForkedMainnetFlashback / rskForkedMainnetFlashback use the former if all the hardhat deployments were deployed at the forked block number use the latter and put all the needed deployments to the external/deployments/rskForkedMainnetFlashback/external/deployments/rskForkedTestnetFlashback folder otherwise - you normally want to use this to exclude contracts that were not deployed by the time of the forked block, so only the ones put there will be seen as deployed