diff --git a/src/miner.h b/src/miner.h
--- a/src/miner.h
+++ b/src/miner.h
@@ -203,7 +203,8 @@
 
     // helper function for addPriorityTxs
     /** Test if tx will still "fit" in the block */
-    TestForBlockResult TestForBlock(CTxMemPool::txiter iter);
+    TestForBlockResult TestForBlock(const Config &config,
+                                    CTxMemPool::txiter iter);
     /** Test if tx still has unconfirmed parents not yet in block */
     bool isStillDependent(CTxMemPool::txiter iter);
 
diff --git a/src/miner.cpp b/src/miner.cpp
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -310,7 +310,7 @@
 }
 
 BlockAssembler::TestForBlockResult
-BlockAssembler::TestForBlock(CTxMemPool::txiter it) {
+BlockAssembler::TestForBlock(const Config &config, CTxMemPool::txiter it) {
     auto blockSizeWithTx =
         nBlockSize +
         ::GetSerializeSize(it->GetTx(), SER_NETWORK, PROTOCOL_VERSION);
@@ -344,7 +344,7 @@
     // Must check that lock times are still valid. This can be removed once MTP
     // is always enforced as long as reorgs keep the mempool consistent.
     CValidationState state;
-    if (!ContextualCheckTransaction(*config, it->GetTx(), state, nHeight,
+    if (!ContextualCheckTransaction(config, it->GetTx(), state, nHeight,
                                     nLockTimeCutoff, nMedianTimePast)) {
         return TestForBlockResult::TXCantFit;
     }
@@ -639,7 +639,7 @@
             continue;
         }
 
-        TestForBlockResult testResult = TestForBlock(iter);
+        TestForBlockResult testResult = TestForBlock(config, iter);
         // Break if the block is completed
         if (testResult == TestForBlockResult::BlockFinished) {
             break;