Python Unit Testing Mock incorrectly

I am new to unit testing in Python. I trying to write unit tests for my class. However I am running into issues:

from <path1> import InnerObj
from <path2> import new_obj
from <path3> import XYZ

class ClassToBeTested(object):

def __init__(self):
    obj = new_obj(param1 = "XYZ", time = 1, innerObj = InnerObj())
    self.attr1 = XYZ(obj)


 def method(self, random, paramStr):

 // Remainder of class

Test class:

from mock import patch, PropertyMock, MagicMock
from <path1> import InnerObj
from <path2> import new_obj
from <path3> import XYZ


@pytest.fixture()
@patch('<path1>.InnerObj', new=MagicMock())
@patch('<path2>.new_obj', new=MagicMock())
@patch('<path3>.XYZ', new=MagicMock())
def mock_test():
    return ClassToBeTested()

def test_method_true(mock_test):
     random = Random_Object()

     booleanResult = mock_test.method(random, paramStr)
     assert booleanResult == True

The error I get is ERROR at setup of test_method_true ______

The error stack mentions innerObj/init.py:26: in init qwerty_main = qwerty_assistant.get_root()

I am likely to believe that mocking is not done correctly for InnerObj as it should not be invoking the code in the init method of mocked objects.

Am I doing something wrong here? Can someone please help in pointing to right direction?

Thanks