Testing tools for Kubernetes

Hi all, I am looking for ways to test my code before going through the cycles of integration tests in CI. The code i'm working on is part of a bigger project, 40-50 containers, some are Java based (memory consumption can be high);

I can unit-test my code but it's out of the application context so it gets me so far. Run time of the entire application may be too long and require a lot of resources for me (others) to run it frequently enough to test every code change.

I tried to "minimize" the app and used Minikube but it does not scale high enough for the tests i need to run.

What other alternatives are available if the test requires more than one kubernetes node, or the load is greater than what a laptop can hold in a single node (which is what Minikube lets you run)?

Thanks.