message: fix test stub
diff: @@ -6,7 +6,7 @@ import React from 'react';
  export default function({displayName = "StubComponent", render} = {}) {
  if (!render) {
  render = function() {
  - return <div>{ this.displayName }</div>;
  + return <div>{ displayName }</div>;
  };
  }
  