Fix test failure on OS X
Fix test failure on OS X

BanzaiMan/pyenv,BanzaiMan/pyenv,cehoffman/pyenv,pyenv/pyenv,yyuu/pyenv,pyenv/pyenv,cehoffman/pyenv,yyuu/pyenv,sebhahn/pyenv,sebhahn/pyenv,zmwangx/pyenv,zmwangx/pyenv,sebhahn/pyenv,pyenv/pyenv