How to manually instantiate a SearchFilter in Django Rest Framework?

Question

I have the following view but the search filter is not being applied. What am I missing?

class ListMyModelView(generics.ListAPIView):

    permission_classes = (IsAuthenticated,)
    authentication_classes = (SessionAuthentication,)
    serializer_class = MyModelSerializer
    pagination_class = StandardResultsSetPagination
    filter_backends = (filters.SearchFilter,)
    search_fields = ('field1', 'field2')

    def get_queryset(self):
        results = MyModel.objects.all()
        return results.order_by('-last_modified').distinct()

    def get(self, request):
        paginator = self.pagination_class()
        queryset = self.get_queryset()
        results_page = paginator.paginate_queryset(queryset, request)
        serializer = self.serializer_class(results_page, many=True)
        return paginator.get_paginated_response(serializer.data)