fixes a flaky lytesttools unit test

Signed-off-by: evanchia <evanchia@amazon.com>

Tools/LyTestTools/tests/unit/test_builtin_helpers.py

@@ -7,6 +7,7 @@ SPDX-License-Identifier: Apache-2.0 OR MIT
 Unit tests for ly_test_tools.builtin.helpers functions.
 """
 import unittest.mock as mock
+import os
 
 import pytest
 
@@ -41,6 +42,8 @@ class MockedWorkspaceManager(ly_test_tools._internal.managers.workspace.Abstract
         )
 
 
+@mock.patch('ly_test_tools._internal.managers.abstract_resource_locator._find_project_json',
+            mock.MagicMock(return_value=os.path.join("mocked", "path")))
 @mock.patch(
     'ly_test_tools._internal.managers.abstract_resource_locator.AbstractResourceLocator',
     mock.MagicMock(return_value=MockedAbstractResourceLocator)