Use importorskip for asdf import in test
Use importorskip for asdf import in test

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