diff --git a/src/js/bitcoinjs-extensions.js b/src/js/bitcoinjs-extensions.js
index 84de8da..cc28677 100644
--- a/src/js/bitcoinjs-extensions.js
+++ b/src/js/bitcoinjs-extensions.js
@@ -1531,6 +1531,17 @@ libs.bitcoin.networks.bitcoinprivate = {
   wif: 0x80,
 };
 
+libs.bitcoin.networks.bitcoinprivatetestnet = {
+  messagePrefix: '\x18BitcoinPrivate Signed Message:\n',
+  bip32: {
+    public: 0x043587CF,
+    private: 0x04358394,
+  },
+  pubKeyHash: 0x1957,
+  scriptHash: 0x19E0,
+  wif: 0xEF,
+};
+
 libs.bitcoin.networks.bitcoinz = {
   messagePrefix: '\x18BitcoinZ Signed Message:\n',
   bip32: {
diff --git a/src/js/index.js b/src/js/index.js
index 2235be4..6110e25 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -2410,6 +2410,13 @@
                 setHdCoin(183);
             },
         },
+        {
+            name: "BTCPt - Bitcoin Private Testnet",
+            onSelect: function() {
+                network = libs.bitcoin.networks.bitcoinprivatetestnet;
+                setHdCoin(1);
+            },
+        },
         {
             name: "BSC - Binance Smart Chain",
             onSelect: function() {
diff --git a/tests/spec/tests.js b/tests/spec/tests.js
index 87ecb55..05982e3 100644
--- a/tests/spec/tests.js
+++ b/tests/spec/tests.js
@@ -997,6 +997,16 @@ it('Allows selection of Bitcoin Private', function(done) {
     };
     testNetwork(done, params);
 });
+it('Allows selection of Bitcoin Private testnet', function(done) {
+    var params = {
+        selectText: "BTCPt - Bitcoin Private Testnet",
+        phrase: "abandon abandon ability",
+        firstAddress: "n1UcUUSDfDppfzh7XLJNHmZkLdbTQg3VAZL",
+        firstPubKey: "0382a5450765e2025bdb5f7d109c9254a11ef97a566228bf171d80ecb348763bb0",
+        firstPrivKey: "cV3coiYD2NhHKfhC6Gb8DzpvPzcGYYExYxuNxpUtKq3VUJrkFLZx",
+    };
+    testNetwork(done, params);
+});
 it('Allows selection of Bitcoin SV', function(done) {
     var params = {
         selectText: "BSV - BitcoinSV",