python - running module within a package getting no module error

I want to organize my python project like so:

/proj

   /test
      __init__.py
      test.py
   /utils
      __init__.py
      util.py

Inside test.py I have want to import a class from utils.util

from utils.util import classA

However, I get an error when I run test.py when I am in the /proj directory:

$ python test/test.py 
Traceback (most recent call last):
  File "test/test.py", line 1, in 
    from utils.util import classA
ImportError: No module named utils.util

However, if I make these changes, the code runs fine (python test.py)

/proj
   test.py
   /utils
      __init__.py
      util.py

I would really like to be able to organize my code like I did at the first example without getting errors. How can I enable myself to do this?

Answer

You can run it as a package.

python -m test.test