Thanks, I'm dumb -- how did I miss the actual relevant test case? :)

```python
Python 2.7.6 (default, Apr  9 2014, 11:48:52) 
[GCC 4.2.1 Compatible Apple LLVM 5.1 (clang-503.0.38)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> assert None, 5
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AssertionError: 5
```