Cakephp hasOne relationship with finder

Question

In the initialize function of OrdersTable.php, I have

$this->hasOne('CurrentReview', [
    'className' => 'Reviews',
    'finder' => 'latest',
    'foreignKey' => 'order_id 
]);

and in ReviewsTable.php, I have

public function findLatest(query $q)
{
    return $q->orderDesc('id')->limit(1);
}

I am trying to get only the latest review associated with the order, but I am only ever able to get the first one.

$order = $this->Orders->get($id, ['contain' => [
    'CurrentReview'
]]);

What am I missing?

I am almost getting what I need with

$order = $this->Orders->get($id, ['contain' => [
    'Reviews' => function ($q) {
        return $q->find('latest');
    }
]]);

but it's inside an array that I don't want