Marcus Hoeppner enhanced end-to-end test reliability for kebab menu interactions in the hpi-schul-cloud/e2e-system-tests repository. He introduced a generic action selector and updated test steps to standardize interaction patterns, ensuring consistency and maintainability across the test suite. By aligning automated tests with the current UI, including reverting a previous change to accurately reflect room and board management features, Marcus reduced test flakiness and supported faster, safer UI iterations. His work leveraged Cypress and JavaScript, demonstrating a strong grasp of end-to-end testing principles and version control practices. The improvements contributed to a more robust and maintainable quality assurance pipeline.