Map<String, Object> flatParams = new HashMap<>();
        flatParams.put("flat", "value");
        assertNull(queryRescorer.evaluate(flatParams));
    }

    @Test
    public void test_evaluate_withLargeParams() {
        queryRescorer = new QueryRescorer() {
            @Override
            public RescorerBuilder<?> evaluate(Map<String, Object> params) {
                if (params != null && params.size() > 100) {