Jasmine toThrow does not work even though an error is thrown

This code fails even though an error is thrown.

it('should throw error when foo config value is falsey', (done) => {
  const config = { foo: null, bar: 'some-name' };
  expect(quux.withConfig(config).load('*', (err, inst) => { done(); })).toThrow();
});

I've also tried this

it('should throw error when foo config value is falsey', (done) => {
  const config = { foo: null, bar: 'some-name' };
  expect(SelfServiceCompletedJobStore.withConfig(config).load('*', (err, inst) => { })).toThrow();
  done();
});

Error Message:

should throw error when foo config value is falsey
  - Error: Requires a non-empty foo:String