如何轻松地将开发目录中已卸载的Perl模块添加到@INC？

I'm writing Perl t/*.t tests for an existing project. During development, I'd like to use 'prove' to run select tests at arbitrary depths in the module directory hierarchy. I've created some t/ directories at the same depth as the *.pm files I'd like to test. Unfortunately, the lib/ at the base of the project's code is not in @INC.I'm writing Perl t/*.t tests for an existing pr