How to change the order of python unit test cases in 'tests' directory

I have flask project. I want to run unit test cases which are in tests directory using test suite. As we know that python modules in the tests directory get executed alphabetically. Can I change that order of execution?

Suppose I have a directory structure like:

/tests
     test_add.py
     test_delete.py
     test_get.py
     test_put.py

But I want to run add, get, delete then put. Is that possible?