diff --git a/src/chainparamsbase.h b/src/chainparamsbase.h
--- a/src/chainparamsbase.h
+++ b/src/chainparamsbase.h
@@ -24,9 +24,11 @@
     const std::string &DataDir() const { return strDataDir; }
     int RPCPort() const { return nRPCPort; }
 
-protected:
-    CBaseChainParams() {}
+    CBaseChainParams() = delete;
+    CBaseChainParams(const std::string &data_dir, int rpc_port)
+        : nRPCPort(rpc_port), strDataDir(data_dir) {}
 
+private:
     int nRPCPort;
     std::string strDataDir;
 };
diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
--- a/src/chainparamsbase.cpp
+++ b/src/chainparamsbase.cpp
@@ -24,36 +24,6 @@
                  OptionsCategory::CHAINPARAMS);
 }
 
-/**
- * Main network
- */
-class CBaseMainParams : public CBaseChainParams {
-public:
-    CBaseMainParams() { nRPCPort = 8332; }
-};
-
-/**
- * Testnet (v3)
- */
-class CBaseTestNetParams : public CBaseChainParams {
-public:
-    CBaseTestNetParams() {
-        nRPCPort = 18332;
-        strDataDir = "testnet3";
-    }
-};
-
-/*
- * Regression test
- */
-class CBaseRegTestParams : public CBaseChainParams {
-public:
-    CBaseRegTestParams() {
-        nRPCPort = 18443;
-        strDataDir = "regtest";
-    }
-};
-
 static std::unique_ptr<CBaseChainParams> globalChainBaseParams;
 
 const CBaseChainParams &BaseParams() {
@@ -64,11 +34,11 @@
 std::unique_ptr<CBaseChainParams>
 CreateBaseChainParams(const std::string &chain) {
     if (chain == CBaseChainParams::MAIN)
-        return std::unique_ptr<CBaseChainParams>(new CBaseMainParams());
+        return std::make_unique<CBaseChainParams>("", 8332);
     else if (chain == CBaseChainParams::TESTNET)
-        return std::unique_ptr<CBaseChainParams>(new CBaseTestNetParams());
+        return std::make_unique<CBaseChainParams>("testnet3", 18332);
     else if (chain == CBaseChainParams::REGTEST)
-        return std::unique_ptr<CBaseChainParams>(new CBaseRegTestParams());
+        return std::make_unique<CBaseChainParams>("regtest", 18443);
     else
         throw std::runtime_error(
             strprintf("%s: Unknown chain %s.", __func__, chain));