In most environments systems are already distributed, it's just that each "component" is a massive monolith. Sometimes, it's the cobol monolith, the .Net monoli

In most environments systems are already distributed, it's just that each "component" is a massive monolith. Sometimes, it's the cobol monolith, the .Net monolith that partially replaced it, and the NodeJS monolith that is going to replace everything (for sure, this time we mean it). Integration testing is already complex in these environments, regardless of whether the components are monoliths or microservices. BDD style integration tests should be almost equivalent, regardless of the architecture, since they are driven by the business domain.