Comment 7 for bug 1807043

After adding the PPA from the test case and using the ubuntu-release-upgrader packages from -proposed I received the following message when the upgrade was being calculated:

"Some third party entries in your sources.list were disabled. You can
re-enable them after the upgrade with the 'software-properties' tool
or your package manager."

bdmurray@clean-bionic-amd64:~$ apt-cache policy ubuntu-release-upgrader-core
ubuntu-release-upgrader-core:
  Installed: 1:18.04.30
  Candidate: 1:18.04.30