[Python] Environment variable coming up as 'None" using dotenv python

I am trying to use python-dotenv, but the environment variables I'm trying to pass keep coming up as 'None'. I have two files in the folder: .env & settings.py

I have the following in my .env file: TEST_VAR=jkh45k3j4h5k34j

And I have the following in the same folder in my settings.py:

import os
from dotenv import load_dotenv
load_dotenv()

test_var = os.getenv("TEST_VAR")

print(test_var)


The output I get when running python3 settings.py is: None

Why am I not able to get the variable passed through to settings.py?

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