Alumnium is an innovative, open-source testing automation tool that employs AI to merge human input with automated testing by converting straightforward language test directives into actionable commands for browsers. It works harmoniously with well-known web automation frameworks such as Selenium and Playwright, enabling software developers and testers to speed up the creation of browser tests while maintaining accuracy and oversight. Supporting any Python-based testing framework, Alumnium capitalizes on advanced language models from leading providers like Anthropic, Google Gemini, OpenAI, and Meta Llama to interpret user instructions and produce browser interactions. Users can craft test scenarios using intuitive commands: "do" for actions, "check" for validations, and "get" for data retrieval from the web page. Additionally, Alumnium references the accessibility tree of the web page and can utilize screenshots when necessary to run tests, thereby ensuring that it works effectively across a range of web applications. This capability not only enhances testing efficiency but also broadens accessibility for diverse users.