add extra test
add extra test

MSeifert04/astropy,bsipocz/astropy,larrybradley/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,MSeifert04/astropy,DougBurke/astropy,dhomeier/astropy,MSeifert04/astropy,astropy/astropy,astropy/astropy,larrybradley/astropy,dhomeier/astropy,astropy/astropy,stargaser/astropy,saimn/astropy,stargaser/astropy,StuartLittlefair/astropy,lpsinger/astropy,funbaker/astropy,stargaser/astropy,pllim/astropy,pllim/astropy,saimn/astropy,mhvk/astropy,mhvk/astropy,saimn/astropy,pllim/astropy,lpsinger/astropy,pllim/astropy,astropy/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,bsipocz/astropy,DougBurke/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,dhomeier/astropy,mhvk/astropy,dhomeier/astropy,StuartLittlefair/astropy,larrybradley/astropy,saimn/astropy,DougBurke/astropy,funbaker/astropy,saimn/astropy,astropy/astropy,lpsinger/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,dhomeier/astropy,bsipocz/astropy,mhvk/astropy,DougBurke/astropy,bsipocz/astropy,funbaker/astropy,mhvk/astropy,lpsinger/astropy,pllim/astropy,funbaker/astropy,aleksandr-bakanov/astropy,stargaser/astropy,lpsinger/astropy