diff --git a/src/test/base58_tests.cpp b/src/test/base58_tests.cpp
index 0531aaadf..c099a461e 100644
--- a/src/test/base58_tests.cpp
+++ b/src/test/base58_tests.cpp
@@ -121,7 +121,6 @@ public:
 BOOST_AUTO_TEST_CASE(base58_keys_valid_parse)
 {
     UniValue tests = read_json(std::string(json_tests::base58_keys_valid, json_tests::base58_keys_valid + sizeof(json_tests::base58_keys_valid)));
-    std::vector<unsigned char> result;
     CBitcoinSecret secret;
     CTxDestination destination;
     SelectParams(CBaseChainParams::MAIN);
@@ -177,7 +176,6 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_parse)
 BOOST_AUTO_TEST_CASE(base58_keys_valid_gen)
 {
     UniValue tests = read_json(std::string(json_tests::base58_keys_valid, json_tests::base58_keys_valid + sizeof(json_tests::base58_keys_valid)));
-    std::vector<unsigned char> result;
 
     for (size_t idx = 0; idx < tests.size(); idx++) {
         UniValue test = tests[idx];
@@ -239,7 +237,6 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_gen)
 BOOST_AUTO_TEST_CASE(base58_keys_invalid)
 {
     UniValue tests = read_json(std::string(json_tests::base58_keys_invalid, json_tests::base58_keys_invalid + sizeof(json_tests::base58_keys_invalid))); // Negative testcases
-    std::vector<unsigned char> result;
     CBitcoinSecret secret;
     CTxDestination destination;
 
diff --git a/src/test/pmt_tests.cpp b/src/test/pmt_tests.cpp
index f6d06d680..3975dff2e 100644
--- a/src/test/pmt_tests.cpp
+++ b/src/test/pmt_tests.cpp
@@ -120,7 +120,6 @@ BOOST_AUTO_TEST_CASE(pmt_malleability)
     std::vector<bool> vMatch = boost::assign::list_of(false)(false)(false)(false)(false)(false)(false)(false)(false)(true)(true)(false);
 
     CPartialMerkleTree tree(vTxid, vMatch);
-    std::vector<uint256> vTxid2;
     BOOST_CHECK(tree.ExtractMatches(vTxid).IsNull());
 }
 
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
index 6eb5ce563..0fcdd6530 100644
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -234,11 +234,7 @@ BOOST_AUTO_TEST_CASE(util_IsHex)
 
 BOOST_AUTO_TEST_CASE(util_seed_insecure_rand)
 {
-    int i;
-    int count=0;
-
     seed_insecure_rand(true);
-
     for (int mod=2;mod<11;mod++)
     {
         int mask = 1;
@@ -247,10 +243,9 @@ BOOST_AUTO_TEST_CASE(util_seed_insecure_rand)
         //mask is 2^ceil(log2(mod))-1
         while(mask<mod-1)mask=(mask<<1)+1;
 
-        count = 0;
+        int count = 0;
         //How often does it get a zero from the uniform range [0,mod)?
-        for (i=0;i<10000;i++)
-        {
+        for (int i = 0; i < 10000; i++) {
             uint32_t rval;
             do{
                 rval=insecure_rand()&mask;