<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=220814) </details> <!--IssueSummary end--> This issue is the outcome from discussion in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/32577#note_353955965 When adding new relations to Import/Export it's not obvious that certain tests need to be added to tree saver/restorer, fixture updates and possibly other places. Add a new section to https://docs.gitlab.com/ee/development/import_export.html specifying which tests and fixture need updates when adding new relations.