In case you have registered a custom implementation of DeploymentScenarioGenerator you cannot guarantee the order of execution here: https://github.com/arquillian/arquillian-core/commit/af9f07060f81db062db848b98cc776d4c7ba207a#diff-d3da9d1cfef4453a56074c1080a43a97R79

In my case the custom implementation is executed first (on empty list of deployments) and then is executed AutomaticDeploymentScenarioGenerator which creates a list of deployments based on @Deployment annotation in testClass

I would need the opposite way.