diff --git a/src/bench/mempool_eviction.cpp b/src/bench/mempool_eviction.cpp
--- a/src/bench/mempool_eviction.cpp
+++ b/src/bench/mempool_eviction.cpp
@@ -97,7 +97,7 @@
     tx7.vout[1].scriptPubKey = CScript() << OP_7 << OP_EQUAL;
     tx7.vout[1].nValue = 10 * COIN;
 
-    CTxMemPool pool(CFeeRate(Amount(1000)));
+    CTxMemPool pool;
 
     CTransaction t1(tx1);
     CTransaction t2(tx2);
diff --git a/src/policy/fees.h b/src/policy/fees.h
--- a/src/policy/fees.h
+++ b/src/policy/fees.h
@@ -221,7 +221,7 @@
      * Create new BlockPolicyEstimator and initialize stats tracking classes
      * with default values.
      */
-    CBlockPolicyEstimator(const CFeeRate &minRelayFee);
+    CBlockPolicyEstimator();
 
     /** Process all the transactions that have been included in a block */
     void processBlock(unsigned int nBlockHeight,
@@ -266,7 +266,6 @@
 
 private:
     //!< Passed to constructor to avoid dependency on main
-    CFeeRate minTrackedFee;
     unsigned int nBestSeenHeight;
     struct TxStatsInfo {
         unsigned int blockHeight;
diff --git a/src/policy/fees.cpp b/src/policy/fees.cpp
--- a/src/policy/fees.cpp
+++ b/src/policy/fees.cpp
@@ -338,13 +338,12 @@
     return true;
 }
 
-CBlockPolicyEstimator::CBlockPolicyEstimator(const CFeeRate &_minRelayFee)
+CBlockPolicyEstimator::CBlockPolicyEstimator()
     : nBestSeenHeight(0), trackedTxs(0), untrackedTxs(0) {
     static_assert(MIN_FEERATE > Amount(0), "Min feerate must be nonzero");
     CFeeRate minFeeRate(MIN_FEERATE);
-    minTrackedFee = _minRelayFee < minFeeRate ? minFeeRate : _minRelayFee;
     std::vector<double> vfeelist;
-    for (double bucketBoundary = minTrackedFee.GetFeePerK().GetSatoshis();
+    for (double bucketBoundary = minFeeRate.GetFeePerK().GetSatoshis();
          bucketBoundary <= double(MAX_FEERATE.GetSatoshis());
          bucketBoundary *= FEE_SPACING) {
         vfeelist.push_back(bucketBoundary);
diff --git a/src/test/blockencodings_tests.cpp b/src/test/blockencodings_tests.cpp
--- a/src/test/blockencodings_tests.cpp
+++ b/src/test/blockencodings_tests.cpp
@@ -62,7 +62,7 @@
 #define SHARED_TX_OFFSET 2
 
 BOOST_AUTO_TEST_CASE(SimpleRoundTripTest) {
-    CTxMemPool pool(CFeeRate(Amount(0)));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     CBlock block(BuildBlockTestCase());
 
@@ -172,7 +172,7 @@
 };
 
 BOOST_AUTO_TEST_CASE(NonCoinbasePreforwardRTTest) {
-    CTxMemPool pool(CFeeRate(Amount(0)));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     CBlock block(BuildBlockTestCase());
 
@@ -253,7 +253,7 @@
 }
 
 BOOST_AUTO_TEST_CASE(SufficientPreforwardRTTest) {
-    CTxMemPool pool(CFeeRate(Amount(0)));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     CBlock block(BuildBlockTestCase());
 
@@ -314,7 +314,7 @@
 }
 
 BOOST_AUTO_TEST_CASE(EmptyBlockRoundTripTest) {
-    CTxMemPool pool(CFeeRate(Amount(0)));
+    CTxMemPool pool;
     CMutableTransaction coinbase;
     coinbase.vin.resize(1);
     coinbase.vin[0].scriptSig.resize(10);
diff --git a/src/test/mempool_tests.cpp b/src/test/mempool_tests.cpp
--- a/src/test/mempool_tests.cpp
+++ b/src/test/mempool_tests.cpp
@@ -48,7 +48,7 @@
         txGrandChild[i].vout[0].nValue = Amount(11000LL);
     }
 
-    CTxMemPool testPool(CFeeRate(Amount(0)));
+    CTxMemPool testPool;
 
     // Nothing in pool, remove should do nothing:
     unsigned int poolSize = testPool.size();
@@ -115,7 +115,7 @@
         txParent.vout[i].nValue = Amount(33000LL);
     }
 
-    CTxMemPool testPool(CFeeRate(Amount(0)));
+    CTxMemPool testPool;
 
     // Nothing in pool, clear should do nothing:
     testPool.clear();
@@ -148,7 +148,7 @@
 }
 
 BOOST_AUTO_TEST_CASE(MempoolIndexingTest) {
-    CTxMemPool pool(CFeeRate(Amount(0)));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
 
     /* 3rd highest fee */
@@ -365,7 +365,7 @@
 }
 
 BOOST_AUTO_TEST_CASE(MempoolAncestorIndexingTest) {
-    CTxMemPool pool(CFeeRate(Amount(0)));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
 
     /* 3rd highest fee */
@@ -480,7 +480,7 @@
 }
 
 BOOST_AUTO_TEST_CASE(MempoolSizeLimitTest) {
-    CTxMemPool pool(CFeeRate(Amount(1000)));
+    CTxMemPool pool;
     TestMemPoolEntryHelper entry;
     entry.dPriority = 10.0;
 
diff --git a/src/test/policyestimator_tests.cpp b/src/test/policyestimator_tests.cpp
--- a/src/test/policyestimator_tests.cpp
+++ b/src/test/policyestimator_tests.cpp
@@ -15,7 +15,7 @@
 BOOST_FIXTURE_TEST_SUITE(policyestimator_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(BlockPolicyEstimates) {
-    CTxMemPool mpool(CFeeRate(Amount(1000)));
+    CTxMemPool mpool;
     TestMemPoolEntryHelper entry;
     Amount basefee(2000);
     Amount deltaFee(100);
diff --git a/src/txmempool.h b/src/txmempool.h
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -561,7 +561,7 @@
 
     /** Create a new CTxMemPool.
      */
-    CTxMemPool(const CFeeRate &_minReasonableRelayFee);
+    CTxMemPool();
     ~CTxMemPool();
 
     /**
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -379,8 +379,7 @@
     assert(int(nSigOpCountWithAncestors) >= 0);
 }
 
-CTxMemPool::CTxMemPool(const CFeeRate &_minReasonableRelayFee)
-    : nTransactionsUpdated(0) {
+CTxMemPool::CTxMemPool() : nTransactionsUpdated(0) {
     // lock free clear
     _clear();
 
@@ -389,7 +388,7 @@
     // pool
     nCheckFrequency = 0;
 
-    minerPolicyEstimator = new CBlockPolicyEstimator(_minReasonableRelayFee);
+    minerPolicyEstimator = new CBlockPolicyEstimator();
 }
 
 CTxMemPool::~CTxMemPool() {
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -84,7 +84,7 @@
 CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
 Amount maxTxFee = DEFAULT_TRANSACTION_MAXFEE;
 
-CTxMemPool mempool(::minRelayTxFee);
+CTxMemPool mempool;
 
 static void CheckBlockIndex(const Consensus::Params &consensusParams);