Mobile is close to our heart - we love seeing more and more sites make their content available in useful & accessible ways for mobile users. To help keep the ball rolling, we've now launched a new Mobile Friendly Test.
The new tool is linked from Search Console's mobile usability report or available directly at https://search.google.com/search-console/mobile-friendly
The updated tool provides us with room to continue to improve on its functionality, and over time, we expect it to replace the previous Mobile Friendly Test. Additionally, of course this tool also works well on your smartphone, if you need to double-check something there!
We'd like to invite you to take it for a spin, try your website and other sites that you're curious about! Let us know how you like it - either here in the comments or in our webmaster help forums.