Testing reducers which change multiple properties with Immutable.js

I'm attempting to migrate a React/Redux app to Immutable.JS and have a question about testing.

Given a reducer which does something like this:

export default (state = initialState, action) => {
  switch (action.type) {

  case RUN_ENDED:
    return state.set('isRunning', false)
                .set('roundResult', action.data)
  default:
   return state
}

I would like to test that both properties have been set correctly.

My old tests would have looked like this:

it('should handle the RUN_ENDED action', () => {

  const action = {
    type: RUN_ENDED,
    data: {
      winnerId: 0
    }
  }

  const result = simulatorReducer(undefined, action)

  expect(result).to.deep.equal({
    isRunning: false,
    roundResult: action.data
  })

})

With Immutable I don't seem able to do these comparisons in quite the same way. I can explicitly check each value in result with result.get('theProperty') but this seems a bit laborious if I have 5-6 values.

Is there some way to do this with Immutable?