According to Google, it’ll start deprecating the Structured Data Testing Tool, saying that the old Structured Data Testing Tool “will still be available for the time being.” At some point in the future, it does plan to go away, so it’s being “strongly recommended” by Google that you use the Rich Results Test to test and validate your structured data.
Google says that these are some of the reasons to use the Rich Results Test over the Structured Data Testing tool:
- It shows which Search feature enhancements are valid for the markup you are providing.
- It handles dynamically loaded structured data markup more effectively.
- It renders both mobile and desktop versions of a result.
- It is fully aligned with Search Console reports.