ES6 module weirdness

lib.js

export default function foo() {
  return 'foo';
};

export function bar() {
  return 'bar';
};

package.json

{
  "name": "blah",
  "version": "0.0.1",
  "scripts": {
    "test": "mocha --compilers js:babel/register"
  },
  "devDependencies": {
    "babel": "^6.2.0",
    "mocha": "^2.2.5"
  }
}

test.js

import lib from './lib';
import assert from 'assert';

describe('module layout', () => {
  it('exports a top-level function', () => {
    assert.equal(typeof lib, 'function', 'top-level export is not a function');
  });
  it('exports member functions', () => {
    assert.equal(typeof lib.bar, 'function', 'module.bar is not a function');
  });
});

Can any ES6 wizards tell me why this doesn't work? Is there a more elegant way to export an ES6 module with a default function and named exports, that you can import in one go? E.g.

import lib from './lib';
var foo = lib();
var bar = lib.bar();