If you want to improve your virtualization security testing skills, you need to do some things. First, you need to keep yourself updated with the latest trends, developments, and challenges in the field of virtualization security testing, such as new tools, frameworks, standards, vulnerabilities, attacks, and best practices. You can do this by reading blogs, articles, books, podcasts, webinars, courses, or certifications related to virtualization security testing. Second, you need to practice your virtualization security testing skills regularly, using different tools, frameworks, methodologies, scenarios, and environments. You can do this by setting up your own virtualized lab, using online platforms, joining online communities, or participating in online challenges or competitions related to virtualization security testing. Third, you need to seek feedback and guidance from others who have more experience or expertise in virtualization security testing, such as mentors, peers, instructors, or consultants. You can do this by asking questions, sharing your work, joining discussions, or seeking reviews or advice related to virtualization security testing.