Unable to test provider in v0.15.1+ with new gpg key

Hello,

I am developing a terraform provider for vercel and I lost my private gpg key and had to create a new one.

I followed the same steps as the first time from this tutorial to add my new gpg key but eversince my tests for terraform versions 0.15.1 and above fail with the following error:
cannot run Terraform provider tests: unexpected error: openpgp: signature made by unknown entity

Here is an example failed run.