webspecter -- Trouble getting wait() to accept timeout option

env.coffee

exports.config =
  baseUrl: 'http://localhost:3137'

exports.selectors = {}

exports.helpers =
  appReady: (done) ->
    browser = @browser
    ready = () -> browser.evaluate(() -> window.app.initialized)
    ready.message = "Timed out waiting for the app to be ready"
    wait.until ready, {for: 20000}, done

errors.bash

Homepage Access
    1) "before all" hook

  ✖ 1 of 1 test failed:

  1) Homepage Access "before all" hook:
     Error: Timeout waiting until: function () {
            return fToBind.apply(this instanceof fNOP 
                                   ? this 
                                   : oThis || window, 
                                 aArgs.concat(Array.prototype.slice.call(arguments)));
          }
      at :19
      at ../nodify/nodify.js:243

homepage.coffee

feature "Homepage Access", (context, browser, $) ->
  before (done) -> 
    browser.visit '/#', () ->
      wait.until context.appReady, done

  it "finds header", ->
    $('h1').text.should.contain "SeaSketch Supports Collaborative"