How to override a log configuration in tests?

Question

In my application, there is a log configuration coming from a file, set like this:

somefile.py

from logging.config import fileconfig
fileconfig('filename') 

But in my test cases, I would like to not have this configuration, I commented the line above to run my tests and I could run my functions and capture the logs I wanted just fine. So my question is how in my test.py file can I override this logging config? Because in production I can't just go there and comment that line. I'm kinda new to the logging, my problem looks basic, but I'm having trouble with it.