oppia: Backend Tests throwing Attribute Error

Describe the bug Backend tests are not running. They are throwing the error: AttributeError: 'module' object has no attribute 'xxxx_test'. The tests were running correctly before I pulled from develop.

To Reproduce Steps to reproduce the behavior:

1. Pull from latest develop branch
2. Run any backend test say python -m scripts.run_backend_tests --test_target=jobs.types.audit_errors_test

Observed behavior This throws error AttributeError: 'module' object has no attribute 'audit_errors_test'

Expected behavior The tests should run.

Screenshots

Desktop (please complete the following information; delete this section if the issue does not arise on desktop):

• OS: Ubuntu 20.04
• Browser Chrome