diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 8e8811510..301c7508b 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -145,13 +145,17 @@ static CMainParams mainParams;
 /**
  * Testnet (v3)
  */
-class CTestNetParams : public CMainParams {
+class CTestNetParams : public CChainParams {
 public:
     CTestNetParams() {
         strNetworkID = "test";
+        consensus.nSubsidyHalvingInterval = 210000;
         consensus.nMajorityEnforceBlockUpgrade = 51;
         consensus.nMajorityRejectBlockOutdated = 75;
         consensus.nMajorityWindow = 100;
+        consensus.powLimit = uint256S("00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
+        consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
+        consensus.nPowTargetSpacing = 10 * 60;
         consensus.fPowAllowMinDifficultyBlocks = true;
         pchMessageStart[0] = 0x0b;
         pchMessageStart[1] = 0x11;
@@ -161,9 +165,7 @@ public:
         nDefaultPort = 18333;
         nPruneAfterHeight = 1000;
 
-        //! Modify the testnet genesis block so the timestamp is valid for a later start.
-        genesis.nTime = 1296688602;
-        genesis.nNonce = 414098458;
+        genesis = CreateGenesisBlock(1296688602, 414098458);
         consensus.hashGenesisBlock = genesis.GetHash();
         assert(consensus.hashGenesisBlock == uint256S("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
 
@@ -204,7 +206,7 @@ static CTestNetParams testNetParams;
 /**
  * Regression test
  */
-class CRegTestParams : public CTestNetParams {
+class CRegTestParams : public CChainParams {
 public:
     CRegTestParams() {
         strNetworkID = "regtest";
@@ -213,13 +215,14 @@ public:
         consensus.nMajorityRejectBlockOutdated = 950;
         consensus.nMajorityWindow = 1000;
         consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
+        consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
+        consensus.nPowTargetSpacing = 10 * 60;
+        consensus.fPowAllowMinDifficultyBlocks = true;
         pchMessageStart[0] = 0xfa;
         pchMessageStart[1] = 0xbf;
         pchMessageStart[2] = 0xb5;
         pchMessageStart[3] = 0xda;
-        genesis.nTime = 1296688602;
-        genesis.nBits = 0x207fffff;
-        genesis.nNonce = 2;
+        genesis = CreateGenesisBlock(1296688602, 2, 0x207fffff);
         consensus.hashGenesisBlock = genesis.GetHash();
         nDefaultPort = 18444;
         assert(consensus.hashGenesisBlock == uint256S("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
@@ -242,6 +245,11 @@ public:
             0,
             0
         };
+        base58Prefixes[PUBKEY_ADDRESS] = std::vector<unsigned char>(1,111);
+        base58Prefixes[SCRIPT_ADDRESS] = std::vector<unsigned char>(1,196);
+        base58Prefixes[SECRET_KEY] =     std::vector<unsigned char>(1,239);
+        base58Prefixes[EXT_PUBLIC_KEY] = boost::assign::list_of(0x04)(0x35)(0x87)(0xCF).convert_to_container<std::vector<unsigned char> >();
+        base58Prefixes[EXT_SECRET_KEY] = boost::assign::list_of(0x04)(0x35)(0x83)(0x94).convert_to_container<std::vector<unsigned char> >();
     }
 };
 static CRegTestParams regTestParams;
diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
index 7d82d689e..9c87bf215 100644
--- a/src/chainparamsbase.cpp
+++ b/src/chainparamsbase.cpp
@@ -25,7 +25,7 @@ static CBaseMainParams mainParams;
 /**
  * Testnet (v3)
  */
-class CBaseTestNetParams : public CBaseMainParams
+class CBaseTestNetParams : public CBaseChainParams
 {
 public:
     CBaseTestNetParams()
@@ -39,11 +39,12 @@ static CBaseTestNetParams testNetParams;
 /*
  * Regression test
  */
-class CBaseRegTestParams : public CBaseTestNetParams
+class CBaseRegTestParams : public CBaseChainParams
 {
 public:
     CBaseRegTestParams()
     {
+        nRPCPort = 18332;
         strDataDir = "regtest";
     }
 };