diff --git a/cmd/addblock/config.go b/cmd/addblock/config.go
index 3f1c7c93..5f479003 100644
--- a/cmd/addblock/config.go
+++ b/cmd/addblock/config.go
@@ -42,7 +42,8 @@ type config struct {
 	Progress       int    `short:"p" long:"progress" description:"Show a progress message each time this number of seconds have passed -- Use 0 to disable progress announcements"`
 	RegressionTest bool   `long:"regtest" description:"Use the regression test network"`
 	SimNet         bool   `long:"simnet" description:"Use the simulation test network"`
-	TestNet3       bool   `long:"testnet" description:"Use the test network"`
+	TestNet3       bool   `long:"testnet" description:"Use the test network (version 3)"`
+	TestNet4       bool   `long:"testnet4" description:"Use the test network (version 4)"`
 	TxIndex        bool   `long:"txindex" description:"Build a full hash-based transaction index which makes all transactions available via the getrawtransaction RPC"`
 }
 
@@ -108,6 +109,10 @@ func loadConfig() (*config, []string, error) {
 		numNets++
 		activeNetParams = &chaincfg.TestNet3Params
 	}
+	if cfg.TestNet4 {
+		numNets++
+		activeNetParams = &chaincfg.TestNet4Params
+	}
 	if cfg.RegressionTest {
 		numNets++
 		activeNetParams = &chaincfg.RegressionNetParams
diff --git a/cmd/btcctl/config.go b/cmd/btcctl/config.go
index 44d28c60..023dd93a 100644
--- a/cmd/btcctl/config.go
+++ b/cmd/btcctl/config.go
@@ -106,7 +106,8 @@ type config struct {
 	RPCUser        string `short:"u" long:"rpcuser" description:"RPC username"`
 	SimNet         bool   `long:"simnet" description:"Connect to the simulation test network"`
 	TLSSkipVerify  bool   `long:"skipverify" description:"Do not verify tls certificates (not recommended!)"`
-	TestNet3       bool   `long:"testnet" description:"Connect to testnet"`
+	TestNet3       bool   `long:"testnet" description:"Connect to testnet (version 3)"`
+	TestNet4       bool   `long:"testnet4" description:"Connect to testnet (version 4)"`
 	SigNet         bool   `long:"signet" description:"Connect to signet"`
 	ShowVersion    bool   `short:"V" long:"version" description:"Display version information and exit"`
 	Wallet         bool   `long:"wallet" description:"Connect to wallet"`
@@ -125,6 +126,12 @@ func normalizeAddress(addr string, chain *chaincfg.Params, useWallet bool) (stri
 			} else {
 				defaultPort = "18334"
 			}
+		case &chaincfg.TestNet4Params:
+			if useWallet {
+				defaultPort = "48332"
+			} else {
+				defaultPort = "48334"
+			}
 		case &chaincfg.SimNetParams:
 			if useWallet {
 				defaultPort = "18554"
@@ -272,6 +279,10 @@ func loadConfig() (*config, []string, error) {
 		numNets++
 		network = &chaincfg.TestNet3Params
 	}
+	if cfg.TestNet4 {
+		numNets++
+		network = &chaincfg.TestNet4Params
+	}
 	if cfg.SimNet {
 		numNets++
 		network = &chaincfg.SimNetParams
diff --git a/cmd/findcheckpoint/config.go b/cmd/findcheckpoint/config.go
index fad01a03..d4ae5dfc 100644
--- a/cmd/findcheckpoint/config.go
+++ b/cmd/findcheckpoint/config.go
@@ -42,7 +42,8 @@ type config struct {
 	NumCandidates  int    `short:"n" long:"numcandidates" description:"Max num of checkpoint candidates to show {1-20}"`
 	RegressionTest bool   `long:"regtest" description:"Use the regression test network"`
 	SimNet         bool   `long:"simnet" description:"Use the simulation test network"`
-	TestNet3       bool   `long:"testnet" description:"Use the test network"`
+	TestNet3       bool   `long:"testnet" description:"Use the test network (version 3)"`
+	TestNet4       bool   `long:"testnet4" description:"Use the test network (version 4)"`
 }
 
 // validDbType returns whether or not dbType is a supported database type.
@@ -96,6 +97,10 @@ func loadConfig() (*config, []string, error) {
 		numNets++
 		activeNetParams = &chaincfg.TestNet3Params
 	}
+	if cfg.TestNet4 {
+		numNets++
+		activeNetParams = &chaincfg.TestNet4Params
+	}
 	if cfg.RegressionTest {
 		numNets++
 		activeNetParams = &chaincfg.RegressionNetParams