Fix test failure.
Fix test failure.

likangning93/cesium,geoscan/cesium,YonatanKra/cesium,josh-bernstein/cesium,likangning93/cesium,kaktus40/cesium,YonatanKra/cesium,jasonbeverage/cesium,josh-bernstein/cesium,likangning93/cesium,likangning93/cesium,likangning93/cesium,AnalyticalGraphicsInc/cesium,AnalyticalGraphicsInc/cesium,progsung/cesium,CesiumGS/cesium,YonatanKra/cesium,YonatanKra/cesium,progsung/cesium,CesiumGS/cesium,CesiumGS/cesium,jasonbeverage/cesium,CesiumGS/cesium,geoscan/cesium,kaktus40/cesium,CesiumGS/cesium