diff --git a/src/test/blockcheck_tests.cpp b/src/test/blockcheck_tests.cpp
--- a/src/test/blockcheck_tests.cpp
+++ b/src/test/blockcheck_tests.cpp
@@ -39,6 +39,10 @@
     BOOST_CHECK_EQUAL(state.GetRejectReason(), reason);
 }
 
+static COutPoint InsecureRandOutPoint() {
+    return COutPoint(TxId(InsecureRand256()), 0);
+}
+
 BOOST_AUTO_TEST_CASE(blockfail) {
     SelectParams(CBaseChainParams::MAIN);
 
@@ -63,7 +67,7 @@
     RunCheckOnBlock(config, block);
 
     // No coinbase
-    tx.vin[0].prevout = COutPoint(InsecureRand256(), 0);
+    tx.vin[0].prevout = InsecureRandOutPoint();
     block.vtx[0] = MakeTransactionRef(tx);
 
     RunCheckOnBlock(config, block, "bad-cb-missing");
@@ -82,7 +86,7 @@
     auto maxTxCount = ((DEFAULT_MAX_BLOCK_SIZE - 1) / txSize) - 1;
 
     for (size_t i = 1; i < maxTxCount; i++) {
-        tx.vin[0].prevout = COutPoint(InsecureRand256(), 0);
+        tx.vin[0].prevout = InsecureRandOutPoint();
         block.vtx.push_back(MakeTransactionRef(tx));
     }
 
@@ -91,7 +95,7 @@
 
     // But reject it with one more transaction as it goes over the maximum
     // allowed block size.
-    tx.vin[0].prevout = COutPoint(InsecureRand256(), 0);
+    tx.vin[0].prevout = InsecureRandOutPoint();
     block.vtx.push_back(MakeTransactionRef(tx));
     RunCheckOnBlock(config, block, "bad-blk-length");
 }
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
@@ -23,6 +23,10 @@
 
 BOOST_FIXTURE_TEST_SUITE(blockencodings_tests, RegtestingSetup)
 
+static COutPoint InsecureRandOutPoint() {
+    return COutPoint(TxId(InsecureRand256()), 0);
+}
+
 static CBlock BuildBlockTestCase() {
     CBlock block;
     CMutableTransaction tx;
@@ -37,12 +41,12 @@
     block.hashPrevBlock = InsecureRand256();
     block.nBits = 0x207fffff;
 
-    tx.vin[0].prevout = COutPoint(InsecureRand256(), 0);
+    tx.vin[0].prevout = InsecureRandOutPoint();
     block.vtx[1] = MakeTransactionRef(tx);
 
     tx.vin.resize(10);
     for (size_t i = 0; i < tx.vin.size(); i++) {
-        tx.vin[i].prevout = COutPoint(InsecureRand256(), 0);
+        tx.vin[i].prevout = InsecureRandOutPoint();
     }
     block.vtx[2] = MakeTransactionRef(tx);