ng test --watch=false ERR code ELIFECYCLE when test fail

i have a problem, i don't think it's normal.

When i launch the command 'ng test --watch=false' with at least one test in error (wrong expect) the command quit with this error

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! ulys-nav@0.0.1 test: `ng test --watch=false`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the ulys-nav@0.0.1 test script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/martels3/.npm/_logs/2019-10-21T11_20_00_883Z-debug.log

But when i fix the test (correct expect), every is normal (without error).

Here is my karma.conf.js

const puppeteer = require('puppeteer');
process.env.CHROME_BIN = puppeteer.executablePath();

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular-devkit/build-angular/plugins/karma')
    ],
    client: {
      clearContext: false, // leave Jasmine Spec Runner output visible in browser
      jasmine: {
        random: false
      }
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, '../coverage'),
      reports: ['html', 'lcovonly'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome', 'ChromeHeadless'],
    customLaunchers: {
      ChromeHeadlessCI: {
        base: 'ChromeHeadless',
        flags: ['--no-sandbox', '--disable-gpu']
      }
    },
    singleRun: false,
    captureTimeout: 210000,
    browserDisconnectTolerance: 3,
    browserDisconnectTimeout: 210000,
    browserNoActivityTimeout: 210000
  });
};

Is it normal to have this horrible error? Because when i launch this command in the CI (bitRise), it quit because of this and i don't want to !