Minitest - A test suite with method-level granularity

After an upgrade, I'm finding the same several test methods failing, so I'd like to automate testing just those instead of all methods in all classes. I want to list each class-method pair (e.g. TestBlogPosts.test_publish, TestUsers.test_signup) and have them run together as a test suite. Either in a file or on the command-line, I don't really care.

I'm aware of these techniques to run several entire classes, but I'm looking for finer granularity here. (Similar to what -n /pattern/ does on the command-line - to run a subset of test methods - but across multiple classes.)