title: Grunt + Watch + Jasmine works one time, fails the second
body: <p>Here is my Grumodule.exports = function(grunt) {</p>
  
  <pre><code>  grunt.initConfig({
      pkg: grunt.file.readJSON('package.json'),
      watch: {
        serve: {
          files: ['server.js', 'src/**/*.coffee'],
          tasks: ['coffee', 'develop', 'jasmine'],
          options: {
            nospawn: true
          }
        },
        test: {
          files: ['tests/*.spec.js', 'src/**/*.coffee'],
          tasks: ['coffee', 'jasmine_node'],
          options: {
            nospawn: true
          }
        }
      },
  
      jasmine_node: {
        options: {
          forceExit: true,
          match: '.',
          matchall: false,
          extensions: 'js',
          specNameMatcher: 'spec',
          jUnit: {
            useDotNotation: true,
            consolidate: true
          }
        },
        all: ['tests/']
      },
      develop: {
        server: {
          file: 'server.js'
        }
      },
      coffee: {
        compile: {
          expand: true,
          bare: true,
          cwd: 'src/',
          src: ['**/*.coffee'],
          dest: 'lib/',
          ext: '.js'
        }
      },
      copy: {
        main: {
          expand: true,
          cwd: 'src/views/',
          src: ['**'],
          dest: 'lib/views/'
        }
      },
  
      less: {...}
    });
  
    grunt.loadNpmTasks('grunt-contrib-coffee');
    grunt.loadNpmTasks('grunt-contrib-copy');
    grunt.loadNpmTasks('grunt-contrib-less');
    grunt.loadNpmTasks('grunt-contrib-jasmine');
    grunt.loadNpmTasks('grunt-jasmine-node');
    grunt.loadNpmTasks('grunt-develop');
    // grunt.loadNpmTasks('grunt-contrib-jasmine');
    grunt.loadNpmTasks('grunt-contrib-less');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.registerTask('serve', ['coffee', 'develop', 'watch:serve']);
    grunt.registerTask('test', ['coffee', 'jasmine_node', 'watch:test']);
    grunt.registerTask('build', ['coffee', 'less']);
    grunt.registerTask('templates', ['copy']);
  
  };
  </code></pre>
  
  <p>And when I run <code>$ grunt test</code>:</p>
  
  <pre><code>Running "coffee:compile" (coffee) task
  
  Running "jasmine_node:all" (jasmine_node) task
  
  mods
      ... [all good]
  
  Finished in 0.211 seconds
  19 tests, 60 assertions, 0 failures
  
  
  
  Running "watch:test" (watch) task
  Waiting...
  &gt;&gt; File "tests/mods.spec.js" changed. // I JUST ADDED A BLANK LINE
  
  Running "coffee:compile" (coffee) task
  
  Running "jasmine_node:all" (jasmine_node) task
  ...
  
  [Some goods, other wrong]
  
  Failures:
  
    1) ...
  
    2) ...
  
    3) ..
  
  Finished in 5.26 seconds
  19 tests, 57 assertions, 3 failures
  </code></pre>
  
  <p><strong>Why? I must precise that I use mockgoose to test</strong></p>