Worked on the web-platform-tests/wpt repository to migrate all prerender-related tests from HTTP to HTTPS, addressing upcoming security requirements for web platform testing. The migration involved updating routing logic and renaming test files to use the .https.html extension, ensuring that all prerender scenarios are executed exclusively over secure connections. This change prepares the test suite for future restrictions that will disallow plaintext prerendering, reducing maintenance overhead and mitigating security risks. The work was implemented using HTML and web platform testing tools, focusing on maintaining comprehensive test coverage while aligning with evolving security standards in browser test environments. No bugs were reported.