How to unit test a repository method that uses 3rd party library in LINQ query?

Question

I am trying to unit test the following method (repo is mocked):

public List<StatusLevelDTO> FindAllTranslated(string locale)
{
    var statusLevels = Context.StatusLevels
        .IncludeFilter(sl => sl.Translations
            .Where(t => t.Locale.Name == locale))
        .Where(sl => !sl.Deleted)
        .ToList();
    return Mapper.Map<List<StatusLevelDTO>>(statusLevels);
}

It uses a 3rd party library called EntityFramework Plus which I believe uses projection to filter included entities.

Now, when I run the whole project, everything is fine, but unit test seems to ignore this method and returns everything.

Is there any way to make IncludeFilter extension method simply do its work?

Mock configuration:

public static DbSet<T> GetMockedDbSet<T>(List<T> sourceList) where T : class
    {
        var queryableList = sourceList.AsQueryable();
        var dbSetMock = new Mock<DbSet<T>>();
        dbSetMock.As<IQueryable<T>>().Setup(x => x.GetEnumerator()).Returns(() => queryableList.GetEnumerator());
        dbSetMock.As<IQueryable<T>>().Setup(m => m.Provider).Returns(queryableList.Provider);
        dbSetMock.As<IQueryable<T>>().Setup(m => m.Expression).Returns(queryableList.Expression);
        dbSetMock.As<IQueryable<T>>().Setup(m => m.ElementType).Returns(queryableList.ElementType);
        dbSetMock.Setup(d => d.Add(It.IsAny<T>())).Callback<T>(s => sourceList.Add(s));
        dbSetMock.Setup(d => d.Include(It.IsAny<string>())).Returns(dbSetMock.Object);
        return dbSetMock.Object;
    }

A possible duplicate, e.g. Mocking Extension Methods with Moq doesn't answer my question as I'm not asking how to mock/stub extension methods. The question is: is it possible to somehow call its logic without mocking/stubbing it?