Fix warning tests for JRuby.
Fix warning tests for JRuby.

Closes gh-73

srawlins/sass,DanteKaris/sass,tenderlove/sass,Galactix/sass,modulexcite/sass,MetaAshley/sass,cmpereirasi/sass,saper/sass,Andrey-Pavlov/sass,amitsuroliya/sass,Nzaga/sass,dylannnn/sass,Industrys/sass,Andrey-Pavlov/sass,nicklima/sass,schneems/sass,amitsuroliya/sass,srinivashappy/sass,JuanitoFatas/sass,14113/sass,xzyfer/sass,antonifs/sass,jaroot32/sass,tangposmarvin/sass,briangonzalez/sass,PMArtz92/sass,stewx/sass,danielfein/sass,danielfein/sass,HugoRLopes/sass,Anshdesire/sass,dylannnn/sass,Ahnita/sass,rammy7219/sass,baiyanghese/sass,MetaAshley/sass,lmetla/sass,stewx/sass,srawlins/sass,nickg33/sass,OrenBochman/sass,liquidmetal/sass,JuanitoFatas/sass,Nzaga/sass,modulexcite/sass,DanteKaris/sass,StephanieMak/sass,ridixcr/sass,liquidmetal/sass,schneems/sass,cmpereirasi/sass,Industrys/sass,hcatlin/sass,rammy7219/sass,Ahnita/sass,hcatlin/sass,antonifs/sass,StephanieMak/sass,saper/sass,Galactix/sass,jaroot32/sass,askl56/sass,xzyfer/sass,askl56/sass,zaru/sass,ridixcr/sass,srinivashappy/sass,oss-practice/sass,OrenBochman/sass,Iamronan/sass,tangposmarvin/sass,HugoRLopes/sass,chriseppstein/sass,Anshdesire/sass,PMArtz92/sass,Iamronan/sass,lmetla/sass,nicklima/sass,nickg33/sass,zaru/sass