You can now a/b test product prices for products that have bundles and subscriptions. This is possible by creating duplicate products and a URL split mechanism to make sure that for each product, a visitor sees the subscriptions or the bundles assigned to it.

Note that you have to configure a subscription or bundle for each of the products individually, in case you want them to be specific to that variation.

Also, make sure to swap the variation products in case you are planning to delete the campaign, so that the customers can keep their subscription running.