assertDoesNotThrow(() -> concreteImplementation.replaceCache());
        }

        @Test
        @DisplayName("Should overwrite existing cache entry")
        void testReplaceCacheOverwrite() {
            String key = "existing-key";
            DfsReferralDataInternal oldEntry = mock(DfsReferralDataInternal.class);

            // Add existing entry
            cacheMap.put(key, oldEntry);