Truffle develop error with simple @openzeppelin/test-helpers

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1

Hello,

im trying to to use await time.latest(); but i get error

Error: Invalid JSON RPC response: ""
at Object.InvalidResponse (node_modules/web3-core-helpers/lib/errors.js:43:16)
at XMLHttpRequest.request.onreadystatechange (node_modules/web3-providers-http/lib/index.js:95:32)
at XMLHttpRequestEventTarget.dispatchEvent (node_modules/xhr2-cookies/xml-http-request-event-target.ts:44:13)
at XMLHttpRequest._setReadyState (node_modules/xhr2-cookies/xml-http-request.ts:219:8)
at XMLHttpRequest._onHttpRequestError (node_modules/xhr2-cookies/xml-http-request.ts:379:8)
at ClientRequest. (node_modules/xhr2-cookies/xml-http-request.ts:266:37)
at Socket.socketErrorListener (_http_client.js:427:9)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21)

even with the most basic test.js:

const { expectRevert, time } = require('@openzeppelin/test-helpers');

contract('X', ([alice, bob, carol, dev, minter]) => {
    beforeEach(async () => {
    });
    it('test', async () => {
        await time.latest();
    });
});

everything else in any test i did worked except im alwys getting that error with any function that uses time

im using truffle develop and:


 "dependencies": {
    "@openzeppelin/contracts": "^3.4.0",
    "@openzeppelin/test-helpers": "^0.5.6",
    "truffle": "^5.1.58",
    "truffle-flattener": "^1.4.4"
  },

EDIT:
i have noticed it works with a very simple Initial-migration:

Migrations = artifacts.require("Migrations");
module.exports = function(deployer) {
  deployer.deploy(Migrations);
};

but with the migration of my own which is:
with

`const Web3 = require('web3');
...

module.exports = async function(deployer, network, accounts) {
`

EDIT2:

probably the error was because i was importing const { expectRevert, time } = require('@openzeppelin/test-helpers');
also in the initial_migration

now its fixed, may i ask if there is an alternative to
time to use in the migration?

id need to do something like this
const eta = (await time.latest()).add(time.duration.hours(9));