Yes, actually that failure was on purpose. It demonstrates we haven't fixed the bug and should help us to actually fix it.

It looks to me today that the is_cached_notfoud() method I added is overnegineered. Maybe we can simply remove it and replace the test with
```
self.assertEqual(template_loader.inspect_cache["missing.html"], TemplateDoesNotExist)
```
The intention was to avoid  accessing the guts (`inspect_cache`) of the loader, but we are doing it above already.