Error.stackTraceLimit = Infinity; require('core-js/proposals/reflect-metadata'); require('zone.js/dist/zone'); require('zone.js/dist/zone-testing'); const testing = require('@angular/core/testing'); const browser = require('@angular/platform-browser-dynamic/testing'); testing.getTestBed().initTestEnvironment( browser.BrowserDynamicTestingModule, browser.platformBrowserDynamicTesting() ); // Then we find all the tests. const context = require.context('./../app', true, /\.spec\.ts$/); // And load the modules. context.keys().map(context);