You can find the program and a way to test USB drives etc in the folder.
It's all command line stuff with a GUI for the desktop.
(See the blog for more info, near the bottom.)
Code is not available yet, the GitHub repro has nothing in it we can see.
Remember, most cards would probably fail, especially if you're still using you older carss.
They have picked a fast modern A1 spec as the baseline.
It doesn't mean your card will not work,nor is it about to fail. It just means the Desktop GUI experience is not as good as it could be.
"We are testing against the A1 specification, which requires a sequential write speed of 10MB/s, 500 random write operations per second, and 1500 random read operations per second; we run the test up to three times."
(Just info collected from the blog)