title: Test run fails: Disconnected (0 times), because no message in 30000 ms
body: <p>I am working on a angular application, when I run "ng test" command it shows some error and says 'Disconnected (0 times), because no message in 30000 ms.
  '. I tried updating karma, jasmine packages and did 'npm install', but still it didn't help any. Here are the dependency packages and karma.conf.js files. Am I missing something here? Any package Upgrade is needed?</p>
  
  <pre><code>"devDependencies": {
      "@angular-devkit/build-angular": "~0.13.0",
      "@angular/animations": "^5.0.0",
      "@angular/cli": "~7.3.2",
      "@angular/compiler-cli": "~7.2.0",
      "@angular/language-service": "~7.2.0",
      "@types/jasmine": "~2.8.8",
      "@types/jasminewd2": "~2.0.3",
      "@types/node": "~8.9.4",
      "codelyzer": "~4.4.2",
      "husky": "^0.13.4",
      "jasmine-core": "^2.5.2",
      "jasmine-spec-reporter": "~4.2.1",
      "karma": "^3.1.4",
      "karma-chrome-launcher": "^2.2.0",
      "karma-coverage-istanbul-reporter": "~2.0.1",
      "karma-jasmine": "^1.1.2",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.4.0",
      "ts-node": "~7.0.0",
      "tslint": "~5.11.0",
      "typescript": "~3.2.2",
      "typescript-formatter": "^7.2.2",
      "webpack": "^4.9.2"
    },
  
  
  
  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
      },
      files: [
        {
          pattern: 'specs.ts',
          included: false
          }
      ],
      preprocessors: {
  
      },
      mime: {
        'text/x-typescript': ['ts', 'tsx']
      },
      coverageIstanbulReporter: {
        dir: require('path').join(__dirname, 'coverage'), reports: ['html', 'lcovonly'],
        reports: ['html', 'lcovonly', 'text-summary'],
        fixWebpackSourcePaths: true,
        thresholds: {
          statements: 80,
          lines: 80,
          branches: 80,
          functions: 80
        }
      },
      reporters: config.angularCli &amp;&amp; config.angularCli.codeCoverage
        ? ['progress', 'coverage-istanbul']
        : ['progress', 'kjhtml'],
      port: 9876,
      colors: true,
      logLevel: config.LOG_INFO,
      autoWatch: true,
      browsers: ['Chrome'],
      customLaunchers: {
        ChromeHeadlessCI: {
          base: 'ChromeHeadless',
          flags: ['--no-sandbox']
        }
      },
      singleRun: false,
      restartOnFileChange: true
    });
  };
  </code></pre>