This is some great news, not only for me, but for everyone out there who regularly used the Structured Data Test Tool: Google announced last week that it will no longer deprecate the Structured Data Test Tool!
As you can read on their blogpost, the Structured Data Test Tool gets a new home. It will be hosted on a new domain as of April 2021. “The main purpose of the tool will be to check syntax and compliance of markup with schema.org standards”, does the article say. Of course, the tool will no longer check if the code that you’ve generated is valid for Google (and other search engines). For this, the Rich Results Tool was made and will still be available.