Promise.all() does not seem to work

The following code demonstrates that Promise.all() never resolves:

var p1 = Promise.resolve(1).then(function () {
  console.log('p1');
});
var p2 = Promise.resolve(2).then(function () {
  console.log('p2');
});

var all = Promise.all([p1, p2]).then(function () {
  console.log('done');
}).catch(function () {
  console.log('FAIL');
});

console.log('Promise test');

The output is:

p1
p2
> Promise test
=undefined