Callback not called by request in chai tests

The callback for request does not seem to get called and the test passes as a result. I presume this may have to do with it being an async call, but I am not sure how to resolve the issue.

var expect = require('chai').expect                                              
var request = require('request'); 

describe('Test http', function(){                                                                             

it('get', function(){                                                        
  request('http://www.google.com', function (error, response, body) {                                       
    throw new Error("test get")                                                                             
  })                                                                                                        
})                                                                                                          

})