Lines to modify in the cypress.config.js file import { defineConfig } from 'cypress' import index from './tests/cypress/plugins/index.js' export default defineConfig({ //... e2e: { setupNodeEvents(on, config) { return index(on, config) }, // ... }, }) Change ./tests/cypress/plugins/index.js file import { activateCypressEnvFile, activateLocalEnvFile} from './swap-env.js' export default (on, config) => { on('task', {activateCypressEnvFile, activateLocalEnvFile}); }; Change ./tests/cypress/plugins/swap-env.js file import { existsSync, renameSync } from 'fs'; export function activateCypressEnvFile() { if (existsSync('.env.cypress')) { renameSync('.env', '.env.backup'); renameSync('.env.cypress', '.env'); } return null; } export function activateLocalEnvFile() { if (existsSync('.env.backup')) { renameSync('.env', '.env.cypress'); renameSync('.env.backup', '.env'); } return null; }