Google’s retired standalone mobile-usability testing tool, discontinued alongside the Search Console Mobile Usability report in December 2023.
The old test supplied a convenient mobile assessment for a URL. Older audits may still link to it or ask for its pass result. That requirement should be updated to a usable testing process, not treated as a missing SEO deliverable.
Mobile usability remains important even though the tool was retired. A page can load quickly yet have a cramped form, hidden navigation or text that requires zooming. Conversely, a usable layout can still have performance problems. These are connected checks, but they are not interchangeable measurements.
Use current browser testing and relevant diagnostics, such as Lighthouse and PageSpeed Insights, alongside actual phone tasks. These tools are alternatives for investigation, not a promise that the old test’s exact verdict has moved unchanged into another product.
Takeaway: Test whether customers can read, navigate and complete important actions on a phone, rather than chasing a retired badge.
Example
A booking page receives a good performance score but its date selector extends beyond the screen. A real-device check catches the problem before customers abandon the form.
What to check
Test common viewport sizes, keyboard interaction and the main conversion path. Keep screenshots and reproducible steps for the developer.
For more detail, see Google page experience and mobile testing changes.