Scala unit testing - stubing a singleton

I'm new to unit testing in Scala and I can't find a way to stub a function defined in a singleton object.

For example:

class Profile {
  def getLatest
    ...
    Feed.getLatestEntries
    ...
}

object Feed(title: String) {
  def getLatestEntries: Future[List[FeedEntry]] { /* Access some API*/ }
}

I'm trying to unit test the getLatest function defined in the Profile class. Since I don't want to actually access an external API through the web in my unit tests I'm trying to stub the Feed object and its getLatestEntries function to return some predefined value.

I've looked into the ScalaMock, EasyMock and Mockito frameworks but could not find a way to stub a method of a singleton object. ScalaMock states

How come all the mocking frameworks do not offer this functionality? How can I do this? stub Feed.getLatestEntries ?

Thanks