Integration tests in Python

Me and my team have been developing and using a library for a while now and we would like to start writing tests to it. I've seen a lot of tutorials and documentation about unit testing and understood it well, but a Google search did not provide much info/documentation about Python integration tests, which are more important to us as we need to be able to know if a change made to a function ruined other functions that depended on it for example.

So I'd like to know, is there a standart/good examples of integration testing in Python?