Lean Software Development is an agile software development methodology that focuses on reducing waste and maximizing value delivery to customers. It is based on the principles of the Toyota Production System and emphasizes continuous improvement, teamwork, and customer focus.

In Lean Software Development, testing is an integral part of the development process. Testing is not considered a separate phase but is instead integrated throughout the development cycle. This is because Lean Software Development emphasizes the need for continuous feedback and continuous improvement, which can only be achieved through continuous testing.

Testing in Lean Software Development is carried out in various forms, including unit testing, acceptance testing, and exploratory testing. Test automation is also an essential component of Lean Software Development, as it helps to reduce waste and improve efficiency. Automated testing helps to detect defects early in the development process, which reduces the cost of rework and improves the overall quality of the software.