global.process = { __proto__: process, pid: 123456 } Date.now = function () { return 1459875739796 } require('os').hostname = function () { return 'abcdefghijklmnopqr' } const pino = require(require.resolve('./../../../')) const log = pino({ prettyPrint: true }) const obj = Object.create(null) Object.assign(obj, { foo: 'bar' }) log.info(obj, 'hello')