fix bug run mining tests
fix bug run mining tests

mlgruby/mining,jgabriellima/mining,jgabriellima/mining,mlgruby/mining,AndrzejR/mining,seagoat/mining,chrisdamba/mining,mining/mining,seagoat/mining,avelino/mining,AndrzejR/mining,mining/mining,avelino/mining,chrisdamba/mining,mlgruby/mining