They may be part of it, but as a publicly traded company, there's got to be a at least a few people there with a fancy pedigree (not that that actually means they are good at their job or care). But if such a test existed, they presumably would have passed it.

They also have an ISO 27001 certificate (they try to claim a bunch of AWSs certs by proxy on their security page, which is ironic as they say AWS stores most of their data while apparently all uploads are on this).