[Adonis 5] I get env error when running japa test

[idylicaro]

I'm using "japa": "^4.0.0", "@adonisjs/core": "^5.4.0".
When I try to run yarn test I get:

yarn run v1.22.11
$ node -r @adonisjs/assembler/build/register japaFile.ts

  Exception 

 E_MISSING_ENV_VALUE: Missing environment variable "HOST" 

japaFile.ts :

import 'reflect-metadata'
import { join } from 'path'
import getPort from 'get-port'
import { configure } from 'japa'
import sourceMapSupport from 'source-map-support'
import execa from 'execa'

process.env.NODE_ENV = 'testing'
process.env.ADONIS_ACE_CWD = join(__dirname)
sourceMapSupport.install({ handleUncaughtExceptions: false })

async function runMigrations() {
  await execa.node('ace', ['migration:run'], { stdio: 'inherit' })
}

async function rollbackMigrations() {
  await execa.node('ace', ['migration:rollback'], { stdio: 'inherit' })
}

async function startHttpServer() {
  const { Ignitor } = await import('@adonisjs/core/build/src/Ignitor')
  process.env.PORT = String(await getPort())
  await new Ignitor(__dirname).httpServer().start()
}

/**
 * Configure test runner
 */
configure({
  files: ['test/**/*.spec.ts'],
  before: [runMigrations, startHttpServer],
  after: [rollbackMigrations],
})

[idylicaro]

Solved by creating a copy of env.example (as .env) in the root folder.

In other discussions I had not understood if they were talking about the solution for deployment or for all kinds of environments