Fix sidereal test correctly
Fix sidereal test correctly

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