Ensure we do not try to test _erfa, to avoid deprecation warning
Ensure we do not try to test _erfa, to avoid deprecation warning

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