Mark test as requiring jplephem.
Mark test as requiring jplephem.

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