Improve checking of test images
Improve checking of test images

TheBrainTech/xwt,steffenWi/xwt,mono/xwt,residuum/xwt,akrisiun/xwt,hwthomas/xwt,mminns/xwt,antmicro/xwt,lytico/xwt,sevoku/xwt,cra0zy/xwt,iainx/xwt,directhex/xwt,mminns/xwt,hamekoz/xwt