diff --git a/src/test/pmt_tests.cpp b/src/test/pmt_tests.cpp
index 277ff3dfb..368a96d5f 100644
--- a/src/test/pmt_tests.cpp
+++ b/src/test/pmt_tests.cpp
@@ -65,7 +65,7 @@ BOOST_AUTO_TEST_CASE(pmt_test1)
             std::vector<bool> vMatch(nTx, false);
             std::vector<uint256> vMatchTxid1;
             for (unsigned int j=0; j<nTx; j++) {
-                bool fInclude = (insecure_rand() & ((1 << (att/2)) - 1)) == 0;
+                bool fInclude = insecure_randbits(att / 2) == 0;
                 vMatch[j] = fInclude;
                 if (fInclude)
                     vMatchTxid1.push_back(vTxid[j]);
diff --git a/src/test/sighash_tests.cpp b/src/test/sighash_tests.cpp
index 3552fcaed..0b45a9730 100644
--- a/src/test/sighash_tests.cpp
+++ b/src/test/sighash_tests.cpp
@@ -119,7 +119,7 @@ void static RandomTransaction(CMutableTransaction &tx, bool fSingle, uint32_t co
         }
         tx.nExpiryHeight = (insecure_randrange(2)) ? insecure_randrange(TX_EXPIRY_HEIGHT_THRESHOLD) : 0;
     } else {
-        tx.nVersion = insecure_rand() & 0x7FFFFFFF;
+        tx.nVersion = insecure_randbits(31);
     }
     tx.vin.clear();
     tx.vout.clear();