diff --git a/src/test/validation_flush_tests.cpp b/src/test/validation_flush_tests.cpp
--- a/src/test/validation_flush_tests.cpp
+++ b/src/test/validation_flush_tests.cpp
@@ -58,7 +58,7 @@
 
     // Without any coins in the cache, we shouldn't need to flush.
     BOOST_CHECK_EQUAL(
-        chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES,
+        chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES,
                                           /*max_mempool_size_bytes*/ 0),
         CoinsCacheSizeState::OK);
 
@@ -75,7 +75,7 @@
         }
 
         BOOST_CHECK_EQUAL(
-            chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES,
+            chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES,
                                               /*max_mempool_size_bytes*/ 0),
             CoinsCacheSizeState::CRITICAL);
 
@@ -98,7 +98,7 @@
         print_view_mem_usage(view);
         BOOST_CHECK_EQUAL(view.AccessCoin(res).DynamicMemoryUsage(), COIN_SIZE);
         BOOST_CHECK_EQUAL(
-            chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES,
+            chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES,
                                               /*max_mempool_size_bytes*/ 0),
             CoinsCacheSizeState::OK);
     }
@@ -107,7 +107,7 @@
     for (int i{0}; i < 4; ++i) {
         add_coin(view);
         print_view_mem_usage(view);
-        if (chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES,
+        if (chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES,
                                               /*max_mempool_size_bytes*/ 0) ==
             CoinsCacheSizeState::CRITICAL) {
             break;
@@ -115,13 +115,13 @@
     }
 
     BOOST_CHECK_EQUAL(
-        chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES,
+        chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES,
                                           /*max_mempool_size_bytes*/ 0),
         CoinsCacheSizeState::CRITICAL);
 
     // Passing non-zero max mempool usage should allow us more headroom.
     BOOST_CHECK_EQUAL(
-        chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES,
+        chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES,
                                           /*max_mempool_size_bytes*/ 1 << 10),
         CoinsCacheSizeState::OK);
 
@@ -129,7 +129,7 @@
         add_coin(view);
         print_view_mem_usage(view);
         BOOST_CHECK_EQUAL(chainstate.GetCoinsCacheSizeState(
-                              tx_pool, MAX_COINS_CACHE_BYTES,
+                              &tx_pool, MAX_COINS_CACHE_BYTES,
                               /*max_mempool_size_bytes*/ 1 << 10),
                           CoinsCacheSizeState::OK);
     }
@@ -148,14 +148,14 @@
         BOOST_CHECK(usage_percentage >= 0.9);
         BOOST_CHECK(usage_percentage < 1);
         BOOST_CHECK_EQUAL(chainstate.GetCoinsCacheSizeState(
-                              tx_pool, MAX_COINS_CACHE_BYTES, 1 << 10),
+                              &tx_pool, MAX_COINS_CACHE_BYTES, 1 << 10),
                           CoinsCacheSizeState::LARGE);
     }
 
     // Using the default max_* values permits way more coins to be added.
     for (int i{0}; i < 1000; ++i) {
         add_coin(view);
-        BOOST_CHECK_EQUAL(chainstate.GetCoinsCacheSizeState(tx_pool),
+        BOOST_CHECK_EQUAL(chainstate.GetCoinsCacheSizeState(&tx_pool),
                           CoinsCacheSizeState::OK);
     }
 
@@ -163,7 +163,7 @@
     // preallocated memory that doesn't get reclaimed even after flush.
 
     BOOST_CHECK_EQUAL(
-        chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES, 0),
+        chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES, 0),
         CoinsCacheSizeState::CRITICAL);
 
     view.SetBestBlock(BlockHash(InsecureRand256()));
@@ -171,7 +171,7 @@
     print_view_mem_usage(view);
 
     BOOST_CHECK_EQUAL(
-        chainstate.GetCoinsCacheSizeState(tx_pool, MAX_COINS_CACHE_BYTES, 0),
+        chainstate.GetCoinsCacheSizeState(&tx_pool, MAX_COINS_CACHE_BYTES, 0),
         CoinsCacheSizeState::CRITICAL);
 }
 
diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -937,11 +937,11 @@
     //! Dictates whether we need to flush the cache to disk or not.
     //!
     //! @return the state of the size of the coins cache.
-    CoinsCacheSizeState GetCoinsCacheSizeState(const CTxMemPool &tx_pool)
+    CoinsCacheSizeState GetCoinsCacheSizeState(const CTxMemPool *tx_pool)
         EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
 
     CoinsCacheSizeState GetCoinsCacheSizeState(
-        const CTxMemPool &tx_pool, size_t max_coins_cache_size_bytes,
+        const CTxMemPool *tx_pool, size_t max_coins_cache_size_bytes,
         size_t max_mempool_size_bytes) EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
 
     std::string ToString() EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2077,17 +2077,17 @@
 }
 
 CoinsCacheSizeState
-CChainState::GetCoinsCacheSizeState(const CTxMemPool &tx_pool) {
+CChainState::GetCoinsCacheSizeState(const CTxMemPool *tx_pool) {
     return this->GetCoinsCacheSizeState(
         tx_pool, m_coinstip_cache_size_bytes,
         gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000);
 }
 
 CoinsCacheSizeState
-CChainState::GetCoinsCacheSizeState(const CTxMemPool &tx_pool,
+CChainState::GetCoinsCacheSizeState(const CTxMemPool *tx_pool,
                                     size_t max_coins_cache_size_bytes,
                                     size_t max_mempool_size_bytes) {
-    int64_t nMempoolUsage = tx_pool.DynamicMemoryUsage();
+    int64_t nMempoolUsage = tx_pool->DynamicMemoryUsage();
     int64_t cacheSize = CoinsTip().DynamicMemoryUsage();
     int64_t nTotalSpace =
         max_coins_cache_size_bytes +
@@ -2128,7 +2128,7 @@
             bool fFlushForPrune = false;
             bool fDoFullFlush = false;
             CoinsCacheSizeState cache_state =
-                GetCoinsCacheSizeState(::g_mempool);
+                GetCoinsCacheSizeState(&::g_mempool);
             LOCK(cs_LastBlockFile);
             if (fPruneMode && (fCheckForPruning || nManualPruneHeight > 0) &&
                 !fReindex) {