Careful here, because you are manually setting `p1.opponent = p2` in the lines above, so you're not really testing what `.initialize` does on its own. It should have been something like:
```ruby
it 'sets the opponent for each player' do
  expect(game.player1.opponent).to eq(game.player2)
  expect(game.player2.opponent).to eq(game.player1)
end
```