Code review comment for autopkgtest-cloud:lpci-run-unit-tests

The issue may be related to the http proxy, and to the fact that the proxy may deny connections to launchpad.net. Can you try adding this mapping:

environment:
  no_proxy: .launchpad.net

to the unit_test job in .launchpad.yaml? E.g.

    [...]
    snaps:
      - name: yq
    environment:
      no_proxy: .launchpad.net
    run-before: |
    [...]

and push the change to this branch? Let's see how it behaves. (Add it to a separate commit so it's easy to drop if proven useless).