Docker Cloud Build External Pull Requests

I have setup CI/CD using Docker Cloud and I have checked the box for Source repository and external pull requests but when someone submits a pull request against my repository I see an attempted run in my build timeline for Tests in <user>:<branch> but in the log it just says Ignoring tests in external pull requests in public repositories for security reasons and the build fails.

How can I make it so external pull requests have the tests run?

I run my project using the forking model and I want to not only get the tests running, but also deploy to a staging server on successful build. I really need a way to unblock external pull requests.