Dynamic Parameter Overrides

Pass different parameter values per region using the object form of regions:

tests:
  app:
    provider: aws-cloudformation
    template: templates/app.yaml
    parameters:
      Environment: shared
    regions:
      - region: us-east-1
        parameters:
          VpcId: vpc-123456
      - region: us-west-2
        parameters:
          VpcId: vpc-789012

Region-level keys override test-level parameters for that region only.

For a full runnable sample (static + dynamic tokens + per-region overrides), see aws-cloudformation-parameters.