wct failure output

[16:44:51] Using gulpfile ~/polymer/gulpfile.js
[16:44:51] Starting 'wct:local'...
Starting Selenium server for local browsers
Selenium server running on port 40499
Web server running on port 2000 and serving from ~/polymer
chrome 46                Beginning tests via http://localhost:2000/components/polymer/generated-index.html?cli_browser_id=0
chrome 46                ✖ Test Suite Initialization

  Failed to execute 'registerElement' on 'Document': Registration failed for type 'dom-module'. A type with that name is already registered.
    <unknown> at   <unknown> at /components/polymer/app/bower_components/polymer/polymer-micro.html:308:0
    <unknown> at   <unknown> at /components/polymer/app/bower_components/polymer/polymer-micro.html:323:0

chrome 46                ✖ Test Suite Initialization

  Polymer.Base._getExtendedPrototype is not a function
    <unknown> at          desugar at /components/polymer/app/bower_components/polymer/polymer-micro.html:71:0
    <unknown> at   window.Polymer at /components/polymer/app/bower_components/polymer/polymer-micro.html:58:0
    <unknown> at        <unknown> at /components/polymer/app/bower_components/polymer/polymer.html:3512:0
    <unknown> at        <unknown> at /components/polymer/app/bower_components/polymer/polymer.html:3579:0

chrome 46                ✖ Test Suite Initialization

  this._desugarBehaviors is not a function
    <unknown> at   HTMLElement.Polymer.Base.registerCallback at /components/polymer/app/bower_components/polymer/polymer-micro.html:181:0
    <unknown> at                                    desugar at /components/polymer/app/bower_components/polymer/polymer-micro.html:74:0
    <unknown> at                             window.Polymer at /components/polymer/app/bower_components/polymer/polymer-micro.html:58:0
    <unknown> at                                  <unknown> at /components/polymer/app/elements/r-api/r-api.html:31:0
    <unknown> at                                  <unknown> at /components/polymer/app/elements/r-api/r-api.html:92:0

chrome 46                ✖ Test Suite Initialization

  this._desugarBehaviors is not a function
    <unknown> at   HTMLElement.Polymer.Base.registerCallback at /components/polymer/app/bower_components/polymer/polymer-micro.html:181:0
    <unknown> at                                    desugar at /components/polymer/app/bower_components/polymer/polymer-micro.html:74:0
    <unknown> at                             window.Polymer at /components/polymer/app/bower_components/polymer/polymer-micro.html:58:0
    <unknown> at                                  <unknown> at /components/polymer/app/test/r-api-basic.html:33:0