What role does QA play in DevOps?

Developers and testers both play a significant role in DevOps. When it comes to their individual responsibilities and job role in DevOps, it seems that the difference is too thin. If you want an application or for that matter a software running, both development and operations are important which comprises QA. Every business that is aiming for success makes sure that each if their software and application have quality and stability.  Developers more often act like testers as they intend to check their own codes to look for any possible error. A tester is completely responsible for testing an application/software by using testing tools or even methods. If an organization is not backed up by a team of strong QA who can test the software/application continuously, then they might get troubled in delivering their projects instantly.