Openssl, git bash, winpty

I’m trying to use Windows environment to replicate testing of my ansible role.
In the appveyor/2012 working version, I have a powershell script using openssl to create certificate
It fails on creating pfx under travis/2016 and I ask myself if it is not due to git-bash & pty interaction as described here


if that’s really the reason, it would be nice to integrate winpty inside image.