[Python] How to fix discovery of module-under-test in test code with unittest?

I've been struggling with this error and I have no idea of why it happens.

ModuleNotFoundError: No module named 'lambdaFunction'
​

This is the folder structure.



And for some reason when I try to run the lambda_unit_test.py it keeps failing.

This is the code in there:

import unittest
from lambdaFunction import index


class LambdaTest(unittest.TestCase):
def lambda_returns_Rick_Sanchez(self):
self.assertEquals(index.lambda_handlerx(), "Should return Rick Sanchez")


if __name__ == '__main__':
unittest.main()


I've also tried things like import lambdaFunction without any luck.

These are the command line outputs:

python3 -m unittest test.lambda_unit_test.py
E
======================================================================
ERROR: lambda_unit_test (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: lambda_unit_test
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/unittest/loader.py", line 154, in loadTestsFromName
module = __import__(module_name)
ModuleNotFoundError: No module named 'test.lambda_unit_test'


----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (errors=1)


If I try running python3 -m unittest test.lambda_unit_test from the root folder it does not run any test:

python3 -m unittest test.lambda_unit_test

----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK


Any ideas on how to fix this?

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