/usr/share/common-lisp/systems/babel-tests.asd is in cl-babel 0.3.0+20091229-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/common-lisp/systems/../source/babel/babel-tests.asd
/usr/share/common-lisp/systems/../source/babel/babel-tests.asd