Deepak Tiwari refactored the Export Stock Salable Quantity tests in the magento/inventory repository, focusing on improving reliability and maintainability for backend inventory features. By narrowing the test scope to simple and virtual products and excluding downloadable products, Deepak reduced data noise and test flakiness, which enabled faster and more accurate feedback on stock export changes. The work involved PHP and Magento testing frameworks, with careful attention to streamlining test structure and clarifying coverage boundaries. This targeted refactor aligned with ongoing quality initiatives, enhancing the maintainability of the codebase and supporting more deterministic and efficient backend development workflows.