Contributed to the Orange-OpenSource/a11y-guidelines repository by delivering a focused update to the WCAG 2.5.3 testing article, enhancing both content clarity and accessibility guidance. The work involved refining accessible name explanations, correcting grammar in the accessible masking section, and updating image paths to ensure accurate asset referencing. Publication metadata was improved by adding and updating relevant fields to support future content refreshes. Collaboration with other contributors and alignment with reviewer feedback and translations ensured the changes met accessibility standards. The update was implemented using Markdown and demonstrated skills in WCAG compliance, accessibility standards, and content writing for technical documentation.