diff --git a/cache/cache_reservation_manager.h b/cache/cache_reservation_manager.h
index 9511a4bfa..cc69de8d8 100644
--- a/cache/cache_reservation_manager.h
+++ b/cache/cache_reservation_manager.h
@@ -75,6 +75,8 @@ class CacheReservationManager {
   Status UpdateCacheReservation(std::size_t new_memory_used);
   std::size_t GetTotalReservedCacheSize();
 
+  static constexpr std::size_t GetDummyEntrySize() { return kSizeDummyEntry; }
+
  private:
   static constexpr std::size_t kSizeDummyEntry = 256 * 1024;
   // The key will be longer than keys for blocks in SST files so they won't
@@ -95,4 +97,4 @@ class CacheReservationManager {
   // The non-prefix part will be updated according to the ID to use.
   char cache_key_[kCacheKeyPrefixSize + kMaxVarint64Length];
 };
-}  // namespace ROCKSDB_NAMESPACE
\ No newline at end of file
+}  // namespace ROCKSDB_NAMESPACE
diff --git a/cache/cache_reservation_manager_test.cc b/cache/cache_reservation_manager_test.cc
index be548d3af..06a50edc8 100644
--- a/cache/cache_reservation_manager_test.cc
+++ b/cache/cache_reservation_manager_test.cc
@@ -25,7 +25,8 @@ class CacheReservationManagerTest : public ::testing::Test {
   static constexpr std::size_t kOneGigabyte = 1024 * 1024 * 1024;
   static constexpr int kNumShardBits = 0;  // 2^0 shard
 
-  static constexpr std::size_t kSizeDummyEntry = 256 * 1024;
+  static constexpr std::size_t kSizeDummyEntry =
+      CacheReservationManager::GetDummyEntrySize();
   static const std::size_t kCacheKeyPrefixSize =
       BlockBasedTable::kMaxCacheKeyPrefixSize + kMaxVarint64Length;
   static constexpr std::size_t kMetaDataChargeOverhead = 10000;
@@ -143,7 +144,8 @@ TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,
      IncreaseCacheReservationOnFullCache) {
   constexpr std::size_t kOneMegabyte = 1024 * 1024;
   constexpr std::size_t kOneGigabyte = 1024 * 1024 * 1024;
-  constexpr std::size_t kSizeDummyEntry = 256 * 1024;
+  constexpr std::size_t kSizeDummyEntry =
+      CacheReservationManager::GetDummyEntrySize();
   constexpr std::size_t kMetaDataChargeOverhead = 10000;
 
   LRUCacheOptions lo;
@@ -307,7 +309,8 @@ TEST_F(CacheReservationManagerTest,
 TEST(CacheReservationManagerWithDelayedDecreaseTest,
      DecreaseCacheReservationWithDelayedDecrease) {
   constexpr std::size_t kOneGigabyte = 1024 * 1024 * 1024;
-  constexpr std::size_t kSizeDummyEntry = 256 * 1024;
+  constexpr std::size_t kSizeDummyEntry =
+      CacheReservationManager::GetDummyEntrySize();
   constexpr std::size_t kMetaDataChargeOverhead = 10000;
 
   LRUCacheOptions lo;
@@ -379,7 +382,8 @@ TEST(CacheReservationManagerWithDelayedDecreaseTest,
 TEST(CacheReservationManagerDestructorTest,
      ReleaseRemainingDummyEntriesOnDestruction) {
   constexpr std::size_t kOneGigabyte = 1024 * 1024 * 1024;
-  constexpr std::size_t kSizeDummyEntry = 256 * 1024;
+  constexpr std::size_t kSizeDummyEntry =
+      CacheReservationManager::GetDummyEntrySize();
   constexpr std::size_t kMetaDataChargeOverhead = 10000;
 
   LRUCacheOptions lo;
@@ -408,4 +412,4 @@ TEST(CacheReservationManagerDestructorTest,
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
\ No newline at end of file
+}