"done() called multiple times" error with restler when testing with mocha

I'm getting a done() called multiple times error when I'm testing a restler call. It doesn't error if I only make the restler call onece, however it errors if I call the same method twice in one test run.

Here is the simplified version of the test

myModule = require 'myModule'

describe 'foo', ->
    describe 'bar', ->
        it "should hi", (done) ->
            myModule.hi done
        it "should hi again", (done) ->
            myModule.hi done

and here is myModule

rest = require 'restler'
exports.hi = (done) ->

    rest.get('http://google.com'
    ).on "complete", (data, response) ->
      console.log 'getting called once'             
      done null, data

Should I be worried about async multiple requests with restler? What is causing this error?

console log output when I add

  ◦ should hi: getting called once
  ✓ should hi (221ms)
  ◦ should hi again: getting called once
  1) should hi
 getting called once
  ✓ should hi again (211ms)