Python regular and unittest import models conflict

I'm having problems with two different import ways requested by running my project and it's unittest. The project has the following structure:

project
|-- app
|   |-- __init__.py
|   |-- model.py
|   |-- other.py
|
|-- test
    |-- __init__.py
    |-- model.py

Well, while I use python3 project to run it, I'm using the -m flag to run unittest, however the way you need to write imports for this two methods are different.

while for unittest I need to use the models to find each archive I want to import, I can't do this way for the regular interpretation.

How to go around it?