I have been working on a Test Library that basically adds support for Primitive Variants of Guavas Test Lib.
And some of my implementations require to change how iterators are checked and I noticed when disabling that the removeIf tests get disabled too.

While looking through that class I noticed that tests check if "SUPPORTS_ITERATOR_REMOVE" flag is set, but if you have the "SUPPORTS_REMOVE" flag missing it tries to test if removeIf throws exceptions.

There is clearly some inconsistencies/bug in there.
https://github.com/google/guava/blob/master/guava-testlib/src/com/google/common/collect/testing/testers/CollectionRemoveIfTester.java

My suggested fix is make them all "SUPPORTS_REMOVE", since the iterator has nothing to do with the removeIf function.
While that there could be a case made for it, though at that point a dedicated flag for lambdas/functions could be made.

Would be nice if this could be addressed, because I kinda either need to copy your class just to fix it or not test removeIf.

Edit: ListListIteratorTester has also these issues, where a dedicated "ITERATOR_MODIFIABLE" would be nice and would simplify the Selection of Features.