Worked on the contentful/marketplace-partner-apps repository to enhance the testability of the EntryEditor component, focusing on improving element identification in multi-locale and focused locale scenarios. Introduced data-field-id and data-field-api-name attributes to the EntryEditor wrapper around DefaultField, enabling more reliable automated testing and smoother integration workflows. The implementation was scoped to minimize changes while addressing the specific needs of automated test frameworks. Utilized React for front end development, leveraging both JavaScript and TypeScript to ensure type safety and maintainability. The work targeted a single feature, reflecting a focused approach to solving integration and testability challenges within the codebase.