avoid failing tests on Travis CI
avoid failing tests on Travis CI

nakaji-dayo/persistent,superduper/persistent,meteficha/persistent,meteficha/persistent,creichert/persistent,mkscrg/persistent,nakaji-dayo/persistent,pseudonom/persistent,gbwey/persistent,junjihashimoto/persistent,gbwey/persistentold,greydot/persistent,bitemyapp/persistent,meteficha/persistent,jcristovao/persistent,plow-technologies/persistent,andrewthad/persistent,gbwey/persistent,mitchellwrosen/persistent,mkscrg/persistent,naushadh/persistent,andrewthad/persistent,greydot/persistent,superduper/persistent,andrewthad/persistent,jasonzoladz/persistent,rdnetto/persistent,rdnetto/persistent,nakaji-dayo/persistent,yesodweb/persistent,pseudonom/persistent,junjihashimoto/persistent,mkscrg/persistent,psibi/persistent,jcristovao/persistent,mitchellwrosen/persistent,mitchellwrosen/persistent,gbwey/persistentold,superduper/persistent,gbwey/persistent,jcristovao/persistent,paul-rouse/persistent,jasonzoladz/persistent,jasonzoladz/persistent,erikd/persistent,greydot/persistent