+ # Delete cached discovery documents.
+ #
+ # This will clear cached docs that belong to other processes (like
+ # concurrent test suites) even if they're still running. They should
+ # be able to tolerate that.
+ for fn in glob.glob(os.path.join(arvados.http_cache('discovery'),
+ '*,arvados,v1,rest,*')):
+ os.unlink(fn)