Comment 2 for bug 1576313

Yes, it seems to be the same one. That one was fixed here https://github.com/juju/juju/commit/8ff118b17bcb0a0b491806e6606ed482a601edce

Then reverted here https://github.com/juju/juju/commit/cb9cf61b026c314b2ea66d6877cbae461071a72e

But it looks like at least the registry key stuck around on the machine running the tests so the warning did not come up anymore.