.NET Aspire does not have any impact on how you structure, write, or execute your unit tests. It does, however, offer support for making broader tests involving more of your running system easier to write and execute. Including a test project in your .NET Aspire solutions will enable running your system and arranging system state, acting by interacting with the running system, and making assertions that compare system outputs and state against expectations. You can then execute such tests expediently, both on developer workstations and in pipelines.