 <p>By looking at the <a href="https://github.com/brunoscopelliti/ng-unique/blob/master/Gruntfile.js#L128" rel="nofollow" title="Gruntfile.js">Gruntfile.js</a> you can see the tasks registered.</p> <p>There is currently three registered tasks; </p> <pre><code>grunt.registerTask('build-js', ['jshint', 'karma:unit', 'uglify:ngUnique']); grunt.registerTask('build-css', ['sass:prod']); grunt.registerTask('build-all', ['build-css', 'build-js']); </code></pre> <p>As you can see from the source, the <code>build-js</code> task includes running the <code>karma:unit</code> configuration.</p> <p>To trigger this registered task, you have to run <code>grunt build-js</code>, or if you just want to run the Karma configuration you have to run <code>grunt karma:unit</code>.</p>