When users launch an AWS CloudFormation template, they get charged for AWS usage even if the stack fails and the instance runs for a very brief time. For this reason, you need to test your Quick Start thoroughly before we publish it. Testing becomes even more important for complex stacks and expensive stacks (such as those that use the X1 instance type).
We have provided a list of guidelines for manually testing and debugging your Quick Start. In addition, we provide an automated testing tool called TaskCat that you can use to validate your templates.