And very cosmetic point, I was not aware of Freshen, but since it is no more maintained I understand why. Have you already considered Aloe ? I moved from Lettuce to Aloe without noticeable troubles and you can export your results to xunit format.
Aren’t you stuck with python 2.x with freshen ?
Source: https://support.nitrokey.com/t/decipher-with-ecdh-key/2375/3?u=szszszsz