[mjhea0]

Have you looked into e2e tests? They verify that the system works as expected - so they should catch those areas that you are not testing for in your unit and integrations tests.

Check out TestCafe. You can see an example of TestCafe in action with a React + Python/Flask app -> https://testdriven.io/part-four-e2e-test-setup/

[virtualmic]

Thanks for the suggestion and this is definitely one option. However, I was hoping to gain more insight into improving my unit and integration tests (which have high coverage), to cover most scenarios and break, if the integration breaks.