The name buble-tape-runner is a bit misleading, because this tool uses both buble as well as reify to compile ES6 JavaScript into a form that Node can interpret. It also isn't really in any way restricted to running tape tests, that's just the purpose for which it was born. The name is simply a followup for babel-tape-runner.
Install with npm i buble-tape-runner, with appropriate save flags if you wish. Then in your test (or other) package.json script, enter buble-tape-runner <glob pattern>, where glob-pattern is e.g. test/*.js.
Babel is an amazing project, which I use often and a lot, but sometimes it can feel a bit like overkill, when you don't need all the latest and greatest of the shiny things available. Buble is a turnkey ES6 to ES5 transpiler, and Reify tackles the new module import and export to CommonJS transpilation. Installation is fast and zero configuration.
Buble Tape Runner is MIT licensed.