测试失败，Angular6

我有一个项目从Angular4升级到6。

一切都很好，但是ng test无法正常工作：

ERROR [karma-server]: Server start failed on port 9876: Error: No provider for "framework:@angular/cli"! (Resolving: framework:@angular/cli)

请帮忙

karma.conf.js

// Karma configuration file, see link for more information
// https://karma-runner.github.io/0.13/config/configuration-file.html

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular/cli' , '@angular-devkit/build-angular'],    
    files: [
      {pattern: './node_modules/@angular/material/prebuilt-themes/indigo-pink.css', included: true, watched: true}
    ],
    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
    },
    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,
    autoWatchBatchDelay: 3000,
    browsers: ['Chrome'],
    singleRun: false,
    customLaunchers: {
      ChromeHeadless: {
        base: 'Chrome',
        flags: [
          // See https://chromium.googlesource.com/chromium/src/+/lkgr/headless/README.md
          '--headless',
          '--disable-gpu',
          // Without a remote debugging port, Google Chrome exits immediately.
          '--remote-debugging-port=9222',
        ],
      }
    } 
  });
};