Comment 8 for bug 1649300

> So it looks to me like sometimes the mocking/faking here isn't effective and we call out to the real glance_store during the unit tests

Agreed. Dharini and I came to that conclusion yesterday in IRC but I can't figure out how that's happening. The set up fixtures seem completely reliable. The only thing I could guess would be problematic is mox, but that's a different thing and I can't understand why it would fail transitively.