If you are in bed with your partner but you are not collaborating, then nothing good is going to happen. This is thee same for quality assurance (QA) and software testing in Agile development projects.
Fully incorporating software testing into your Scrum project from the start is essential to cross-team collaboration. It is only by maintaining interaction between the software development and software testing perspectives that can you ensure a quality and secure end-product. So rather than leave software testing to the end, this presentations explains that software developers should get into bed with QA from the beginning, for a lasting relationship that keeps, both the Scrum team and the client, smiling.
Video producer: https://www.agile.cymru/
Slides: https://www.slideshare.net/AgileCymru/get-into-bed-with-qa-and-keep-testing-agile
Further reading: Coding and Testing: Testers and Programmers Working Together