Try to fix failure in travis
Try to fix failure in travis

k0kubun/byebug,saisai/byebug,webdev1001/byebug,yui-knk/byebug,yui-knk/byebug,ozydingo/byebug,deivid-rodriguez/byebug,icebreaker/byebug,miamiruby/byebug,k0kubun/byebug,saisai/byebug,webdev1001/byebug,deivid-rodriguez/byebug,os97673/byebug,yui-knk/byebug,deivid-rodriguez/byebug,icebreaker/byebug,k0kubun/byebug,miamiruby/byebug,guilherme/byebug,os97673/byebug,scalp42/byebug,scalp42/byebug,guilherme/byebug,guilherme/byebug,ozydingo/byebug