I finished the remaining tests for Micropub clients today!
You can now use the test suite to test updating, deleting, undeleting and querying from your client. As you progress through the tests, the specific features in the implementation report are checked off as you go! There are still a few things in the implementation report that will need to be self-reported, because I can't really tell whether your client considered an update successful for example.
I hope this is helpful to people making Micropub clients! As always, feel free to open an issue if you notice a problem or have a request!