old_contents: module.exports = function(grunt) {
      require('load-grunt-tasks')(grunt);
  
      grunt.initConfig({
          pkg: grunt.file.readJSON('package.json'),
  
          phplint: {
              options: {
                  swapPath: '/tmp'
              },
              application: ['src/*.php']
          },
          phpcs: {
              options: {
                  bin: './vendor/bin/phpcs',
                  standard: './phpcs.xml'
              },
              application: {
                  dir: ['./src']
              }
          },
          phpmd: {
              options: {
                  bin: './vendor/bin/phpmd',
                  rulesets: './phpmd.xml',
                  reportFormat: 'text'
              },
              application: {
                  dir: './src'
              }
          },
          phpdcd: {
              options: {
                  bin: './vendor/bin/phpdcd'
              },
              application: {
                  dir: ['src']
              }
          },
          phpunit: {
              options: {
                  bin: './vendor/bin/phpunit'
              },
              application: {
                  configuration: './phpunit.xml'
              }
          }
      });
  
      grunt.registerTask('default', ['phplint', 'phpcs', 'phpmd', 'phpdcd']);
  };
  
new_contents: module.exports = function(grunt) {
      require('load-grunt-tasks')(grunt);
  
      grunt.initConfig({
          pkg: grunt.file.readJSON('package.json'),
  
          phplint: {
              options: {
                  swapPath: '/tmp'
              },
              application: ['src/*.php']
          },
          phpcs: {
              options: {
                  bin: './vendor/bin/phpcs',
                  standard: './phpcs.xml'
              },
              application: {
                  dir: ['./src']
              }
          },
          phpmd: {
              options: {
                  bin: './vendor/bin/phpmd',
                  rulesets: './phpmd.xml',
                  reportFormat: 'text'
              },
              application: {
                  dir: './src'
              }
          },
          phpdcd: {
              options: {
                  bin: './vendor/bin/phpdcd'
              },
              application: {
                  dir: ['src']
              }
          },
          phpunit: {
              options: {
                  bin: './vendor/bin/phpunit'
              },
              application: {
                  configuration: './phpunit.xml'
              }
          }
      });
  
      grunt.registerTask('default', ['phplint', 'phpcs', 'phpmd', 'phpdcd', 'phpunit']);
  };
  
subject: add phpunit to grunt task