ModuleNotFoundError: No module named 'utils' for unittest in Python

Question

I'm trying to run a test and I keep getting ModuleNotFoundError: No module named 'utils'

I am running the command from within the utils\tests folder and this is the line:

python -m unittest test_helpers

This is the structure of my folders:

Project/
|-- src/
|   |-- utils/
|   |   |-- __init__.py
|   |   |-- helpers.py
|   |   |-- tests/
|   |   |   |-- __init__.py
|   |   |   |-- test_helpers.py

Here is the code:

import unittest
from utils.helpers import validate_folder_exists


class HelpersTest(unittest.TestCase):
    def test_folder_exists(self):
        self.assertTrue(
            validate_folder_exists('test_folder'))

I've looked at similar solutions over here and haven't found anything that works so far.