def test_revision_diff_modified(self):
        payload = base.DocumentFixture.get_minimal_multi_fixture(count=3)
        bucket_name = test_utils.rand_name('bucket')
        documents = self.create_documents(bucket_name, payload)
        revision_id = documents[0]['revision_id']

        payload[0]['data'] = {'modified': 'modified'}
        comparison_documents = self.create_documents(bucket_name, payload)
        comparison_revision_id = comparison_documents[0]['revision_id']

        self._verify_buckets_status(
            revision_id, comparison_revision_id, {bucket_name: 'modified'})