I have a legacy database from which my Django application must migrate data 
into a Django database. The relevant date fields are actually TIMESTAMP 
columns in the database, but something (perhaps Django, or python's MySQL 
driver?) loads these columns as timezone naive datetime objects, rather 
than integers. So I wrote my migration code under the assumption that the 
dates coming out of the legacy database are timezone naive.

Unfortunately, now that I'm trying to write tests for this migrator, I 
can't find any way to load timezone naive datetimes *into* my test legacy 
database. I can't use integer timestamps, because the DateTimeField doesn't 
accept that kind of input (I get a JSON serialization error when I try), so 
I'm using datetime strings like this: "2014-08-01T00:00:00" in my fixture. But 
regardless of whether or not I include a UTC offset in the string, the 
datetime objects that come out of the database during my tests are somehow 
timezone aware. This causes my code to crash because it calls make_aware(), 
which throws ValueError('Not naive datetime (tzinfo is already set)'). 

It seems like having USE_TZ = True is forcibly making my fixture dates 
timezone aware, which I don't want. But USE_TZ will be True during the 
actual migration, so I can't just turn it off during the tests. So how can 
I load timezone naive dates into my test database?

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