I'd recommend setting verbose-tests = true in config.toml so you can see the name of the tests.
In addition to looking at the ignore rules at the top of each test, also keep in mind that compiletest uses a fingerprinting mechanism to skip tests if it thinks nothing has changed since the last time it ran. The fingerprinting is somewhat simple, so it can be incorrect sometimes. In that case, you have to delete the build/*/test directory, though hopefully that is almost never needed.