Timeout when testing with mocha

I am trying to write a test case using mocha and mongoose. But the following piece of code I wrote gives me a "Todo" error before each "hook: Error: Exceeded 2000ms. Make sure the done () callback is called in this test." I can't iron out the problem. I am a beginner at node. Can someone please help me on this issue. Thanks in advance.

 var Todo = require('../models/Todo'),
     should = require('Should');

    describe('Todo', function(){

      beforeEach(function(done){
        faketodo = {
          name    : 'xyz',
          completed     : true,
          note  : "This is test note"
        }
        Todo.remove(done);
      });

      describe('#save()', function(){
        var todo;

        beforeEach(function(done){

          console.log('before each todo entry');
          todo = new Todo(faketodo);
          console.log('before each todo exit');
          done();
        });


        it('should have name property', function(done){
          todo.save(function(err, todo){

            should.not.exist(err);
            todo.should.have.property('name', 'xyz');
            done();
          });
        });


        it('should not save if name is not present', function(done){
          todo.name = '';
          todo.save(function(err, todo){
            should.exist(err);
            should.not.exist(todo.name);
            done();
          });
        });
      });

    });