AWSTemplateFormatVersion : '2010-09-09' Transform: AWS::Serverless-2016-10-31 Description: A hello world application. Parameters: LayerOneArn: Default: arn:aws:lambda:us-west-2:111111111111:layer:layer:1 Type: String LayerTwoArn: Default: arn:aws:lambda:us-west-2:111111111111:layer:layer2:1 Type: String ChangedLayerArn: Default: arn:aws:lambda:us-west-2:111111111111:layer:changed_layer:1 Type: String NonExistentLayerArn: Default: arn:aws:lambda:us-west-2:111111111111:layer:non_existent_layer:1 Type: String Resources: SubApp: Type: AWS::Serverless::Application Properties: Location: ../layers/layer-template.yml Parameters: LayerOneArn: !Ref LayerOneArn LayerTwoArn: !Ref LayerTwoArn ChangedLayerArn: !Ref ChangedLayerArn NonExistentLayerArn: !Ref NonExistentLayerArn