diff --git a/CHANGELOG.md b/CHANGELOG.md
index 90ffbb385..4266f8f6e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ customers cannot upgrade their bootloader, its changes are recorded separately.
 ## Firmware
 
 ### [Unreleased]
+- Bitcoin: add support for regtest
 
 ### 9.20.0
 - Bitcoin: UX improvements for payment request confirmations
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6332b0665..2e7efd49f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,8 +96,8 @@ endif()
 #
 # Versions MUST contain three parts and start with lowercase 'v'.
 # Example 'v1.0.0'. They MUST not contain a pre-release label such as '-beta'.
-set(FIRMWARE_VERSION "v9.20.0")
-set(FIRMWARE_BTC_ONLY_VERSION "v9.20.0")
+set(FIRMWARE_VERSION "v9.21.0")
+set(FIRMWARE_BTC_ONLY_VERSION "v9.21.0")
 set(BOOTLOADER_VERSION "v1.0.6")
 
 find_package(PythonInterp 3.6 REQUIRED)
diff --git a/messages/btc.proto b/messages/btc.proto
index b37c06b67..9d1d56697 100644
--- a/messages/btc.proto
+++ b/messages/btc.proto
@@ -24,6 +24,8 @@ enum BTCCoin {
   TBTC = 1;
   LTC = 2;
   TLTC = 3;
+  // Regtest
+  RBTC = 4;
 };
 
 
diff --git a/py/bitbox02/CHANGELOG.md b/py/bitbox02/CHANGELOG.md
index bd97cef6c..caab10cba 100644
--- a/py/bitbox02/CHANGELOG.md
+++ b/py/bitbox02/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 # 8.0.0
 - SD card: Remove API to prompt removal of the microSD card from the device
+- Add support for regtest (supported from firmware version v9.21.0)
 
 # 7.0.0
 - get_info: add optional device initialized boolean to returned tuple
diff --git a/py/bitbox02/bitbox02/bitbox02/__init__.py b/py/bitbox02/bitbox02/bitbox02/__init__.py
index 368e59ca4..50d5ede42 100644
--- a/py/bitbox02/bitbox02/bitbox02/__init__.py
+++ b/py/bitbox02/bitbox02/bitbox02/__init__.py
@@ -16,7 +16,7 @@
 from __future__ import print_function
 import sys
 
-__version__ = "7.0.0"
+__version__ = "8.0.0"
 
 if sys.version_info.major != 3 or sys.version_info.minor < 6:
     print(
diff --git a/py/bitbox02/bitbox02/communication/generated/btc_pb2.py b/py/bitbox02/bitbox02/communication/generated/btc_pb2.py
index 7ac22c05c..c9fbc75b1 100644
--- a/py/bitbox02/bitbox02/communication/generated/btc_pb2.py
+++ b/py/bitbox02/bitbox02/communication/generated/btc_pb2.py
@@ -15,7 +15,7 @@
 from . import antiklepto_pb2 as antiklepto__pb2
 
 
-DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\tbtc.proto\x12\x14shiftcrypto.bitbox02\x1a\x0c\x63ommon.proto\x1a\x10\x61ntiklepto.proto\"\xc6\x04\n\x0f\x42TCScriptConfig\x12G\n\x0bsimple_type\x18\x01 \x01(\x0e\x32\x30.shiftcrypto.bitbox02.BTCScriptConfig.SimpleTypeH\x00\x12\x42\n\x08multisig\x18\x02 \x01(\x0b\x32..shiftcrypto.bitbox02.BTCScriptConfig.MultisigH\x00\x12>\n\x06policy\x18\x03 \x01(\x0b\x32,.shiftcrypto.bitbox02.BTCScriptConfig.PolicyH\x00\x1a\xd9\x01\n\x08Multisig\x12\x11\n\tthreshold\x18\x01 \x01(\r\x12)\n\x05xpubs\x18\x02 \x03(\x0b\x32\x1a.shiftcrypto.bitbox02.XPub\x12\x16\n\x0eour_xpub_index\x18\x03 \x01(\r\x12N\n\x0bscript_type\x18\x04 \x01(\x0e\x32\x39.shiftcrypto.bitbox02.BTCScriptConfig.Multisig.ScriptType\"\'\n\nScriptType\x12\t\n\x05P2WSH\x10\x00\x12\x0e\n\nP2WSH_P2SH\x10\x01\x1aK\n\x06Policy\x12\x0e\n\x06policy\x18\x01 \x01(\t\x12\x31\n\x04keys\x18\x02 \x03(\x0b\x32#.shiftcrypto.bitbox02.KeyOriginInfo\"3\n\nSimpleType\x12\x0f\n\x0bP2WPKH_P2SH\x10\x00\x12\n\n\x06P2WPKH\x10\x01\x12\x08\n\x04P2TR\x10\x02\x42\x08\n\x06\x63onfig\"\xfc\x02\n\rBTCPubRequest\x12+\n\x04\x63oin\x18\x01 \x01(\x0e\x32\x1d.shiftcrypto.bitbox02.BTCCoin\x12\x0f\n\x07keypath\x18\x02 \x03(\r\x12\x41\n\txpub_type\x18\x03 \x01(\x0e\x32,.shiftcrypto.bitbox02.BTCPubRequest.XPubTypeH\x00\x12>\n\rscript_config\x18\x04 \x01(\x0b\x32%.shiftcrypto.bitbox02.BTCScriptConfigH\x00\x12\x0f\n\x07\x64isplay\x18\x05 \x01(\x08\"\x8e\x01\n\x08XPubType\x12\x08\n\x04TPUB\x10\x00\x12\x08\n\x04XPUB\x10\x01\x12\x08\n\x04YPUB\x10\x02\x12\x08\n\x04ZPUB\x10\x03\x12\x08\n\x04VPUB\x10\x04\x12\x08\n\x04UPUB\x10\x05\x12\x10\n\x0c\x43\x41PITAL_VPUB\x10\x06\x12\x10\n\x0c\x43\x41PITAL_ZPUB\x10\x07\x12\x10\n\x0c\x43\x41PITAL_UPUB\x10\x08\x12\x10\n\x0c\x43\x41PITAL_YPUB\x10\tB\x08\n\x06output\"k\n\x1a\x42TCScriptConfigWithKeypath\x12<\n\rscript_config\x18\x02 \x01(\x0b\x32%.shiftcrypto.bitbox02.BTCScriptConfig\x12\x0f\n\x07keypath\x18\x03 \x03(\r\"\xc5\x02\n\x12\x42TCSignInitRequest\x12+\n\x04\x63oin\x18\x01 \x01(\x0e\x32\x1d.shiftcrypto.bitbox02.BTCCoin\x12H\n\x0escript_configs\x18\x02 \x03(\x0b\x32\x30.shiftcrypto.bitbox02.BTCScriptConfigWithKeypath\x12\x0f\n\x07version\x18\x04 \x01(\r\x12\x12\n\nnum_inputs\x18\x05 \x01(\r\x12\x13\n\x0bnum_outputs\x18\x06 \x01(\r\x12\x10\n\x08locktime\x18\x07 \x01(\r\x12H\n\x0b\x66ormat_unit\x18\x08 \x01(\x0e\x32\x33.shiftcrypto.bitbox02.BTCSignInitRequest.FormatUnit\"\"\n\nFormatUnit\x12\x0b\n\x07\x44\x45\x46\x41ULT\x10\x00\x12\x07\n\x03SAT\x10\x01\"\xfe\x02\n\x13\x42TCSignNextResponse\x12<\n\x04type\x18\x01 \x01(\x0e\x32..shiftcrypto.bitbox02.BTCSignNextResponse.Type\x12\r\n\x05index\x18\x02 \x01(\r\x12\x15\n\rhas_signature\x18\x03 \x01(\x08\x12\x11\n\tsignature\x18\x04 \x01(\x0c\x12\x12\n\nprev_index\x18\x05 \x01(\r\x12W\n\x1d\x61nti_klepto_signer_commitment\x18\x06 \x01(\x0b\x32\x30.shiftcrypto.bitbox02.AntiKleptoSignerCommitment\"\x82\x01\n\x04Type\x12\t\n\x05INPUT\x10\x00\x12\n\n\x06OUTPUT\x10\x01\x12\x08\n\x04\x44ONE\x10\x02\x12\x0f\n\x0bPREVTX_INIT\x10\x03\x12\x10\n\x0cPREVTX_INPUT\x10\x04\x12\x11\n\rPREVTX_OUTPUT\x10\x05\x12\x0e\n\nHOST_NONCE\x10\x06\x12\x13\n\x0fPAYMENT_REQUEST\x10\x07\"\xea\x01\n\x13\x42TCSignInputRequest\x12\x13\n\x0bprevOutHash\x18\x01 \x01(\x0c\x12\x14\n\x0cprevOutIndex\x18\x02 \x01(\r\x12\x14\n\x0cprevOutValue\x18\x03 \x01(\x04\x12\x10\n\x08sequence\x18\x04 \x01(\r\x12\x0f\n\x07keypath\x18\x06 \x03(\r\x12\x1b\n\x13script_config_index\x18\x07 \x01(\r\x12R\n\x15host_nonce_commitment\x18\x08 \x01(\x0b\x32\x33.shiftcrypto.bitbox02.AntiKleptoHostNonceCommitment\"\xe3\x01\n\x14\x42TCSignOutputRequest\x12\x0c\n\x04ours\x18\x01 \x01(\x08\x12\x31\n\x04type\x18\x02 \x01(\x0e\x32#.shiftcrypto.bitbox02.BTCOutputType\x12\r\n\x05value\x18\x03 \x01(\x04\x12\x0f\n\x07payload\x18\x04 \x01(\x0c\x12\x0f\n\x07keypath\x18\x05 \x03(\r\x12\x1b\n\x13script_config_index\x18\x06 \x01(\r\x12\"\n\x15payment_request_index\x18\x07 \x01(\rH\x00\x88\x01\x01\x42\x18\n\x16_payment_request_index\"\x99\x01\n\x1b\x42TCScriptConfigRegistration\x12+\n\x04\x63oin\x18\x01 \x01(\x0e\x32\x1d.shiftcrypto.bitbox02.BTCCoin\x12<\n\rscript_config\x18\x02 \x01(\x0b\x32%.shiftcrypto.bitbox02.BTCScriptConfig\x12\x0f\n\x07keypath\x18\x03 \x03(\r\"\x0c\n\nBTCSuccess\"m\n\"BTCIsScriptConfigRegisteredRequest\x12G\n\x0cregistration\x18\x01 \x01(\x0b\x32\x31.shiftcrypto.bitbox02.BTCScriptConfigRegistration\"<\n#BTCIsScriptConfigRegisteredResponse\x12\x15\n\ris_registered\x18\x01 \x01(\x08\"\xfc\x01\n\x1e\x42TCRegisterScriptConfigRequest\x12G\n\x0cregistration\x18\x01 \x01(\x0b\x32\x31.shiftcrypto.bitbox02.BTCScriptConfigRegistration\x12\x0c\n\x04name\x18\x02 \x01(\t\x12P\n\txpub_type\x18\x03 \x01(\x0e\x32=.shiftcrypto.bitbox02.BTCRegisterScriptConfigRequest.XPubType\"1\n\x08XPubType\x12\x11\n\rAUTO_ELECTRUM\x10\x00\x12\x12\n\x0e\x41UTO_XPUB_TPUB\x10\x01\"b\n\x14\x42TCPrevTxInitRequest\x12\x0f\n\x07version\x18\x01 \x01(\r\x12\x12\n\nnum_inputs\x18\x02 \x01(\r\x12\x13\n\x0bnum_outputs\x18\x03 \x01(\r\x12\x10\n\x08locktime\x18\x04 \x01(\r\"r\n\x15\x42TCPrevTxInputRequest\x12\x15\n\rprev_out_hash\x18\x01 \x01(\x0c\x12\x16\n\x0eprev_out_index\x18\x02 \x01(\r\x12\x18\n\x10signature_script\x18\x03 \x01(\x0c\x12\x10\n\x08sequence\x18\x04 \x01(\r\">\n\x16\x42TCPrevTxOutputRequest\x12\r\n\x05value\x18\x01 \x01(\x04\x12\x15\n\rpubkey_script\x18\x02 \x01(\x0c\"\xab\x02\n\x18\x42TCPaymentRequestRequest\x12\x16\n\x0erecipient_name\x18\x01 \x01(\t\x12\x42\n\x05memos\x18\x02 \x03(\x0b\x32\x33.shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo\x12\r\n\x05nonce\x18\x03 \x01(\x0c\x12\x14\n\x0ctotal_amount\x18\x04 \x01(\x04\x12\x11\n\tsignature\x18\x05 \x01(\x0c\x1a{\n\x04Memo\x12Q\n\ttext_memo\x18\x01 \x01(\x0b\x32<.shiftcrypto.bitbox02.BTCPaymentRequestRequest.Memo.TextMemoH\x00\x1a\x18\n\x08TextMemo\x12\x0c\n\x04note\x18\x01 \x01(\tB\x06\n\x04memo\"\xee\x01\n\x15\x42TCSignMessageRequest\x12+\n\x04\x63oin\x18\x01 \x01(\x0e\x32\x1d.shiftcrypto.bitbox02.BTCCoin\x12G\n\rscript_config\x18\x02 \x01(\x0b\x32\x30.shiftcrypto.bitbox02.BTCScriptConfigWithKeypath\x12\x0b\n\x03msg\x18\x03 \x01(\x0c\x12R\n\x15host_nonce_commitment\x18\x04 \x01(\x0b\x32\x33.shiftcrypto.bitbox02.AntiKleptoHostNonceCommitment\"+\n\x16\x42TCSignMessageResponse\x12\x11\n\tsignature\x18\x01 \x01(\x0c\"\x81\x05\n\nBTCRequest\x12_\n\x1bis_script_config_registered\x18\x01 \x01(\x0b\x32\x38.shiftcrypto.bitbox02.BTCIsScriptConfigRegisteredRequestH\x00\x12V\n\x16register_script_config\x18\x02 \x01(\x0b\x32\x34.shiftcrypto.bitbox02.BTCRegisterScriptConfigRequestH\x00\x12\x41\n\x0bprevtx_init\x18\x03 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\x01(\x0b\x32,.shiftcrypto.bitbox02.BTCSignMessageResponseH\x00\x12X\n\x1c\x61ntiklepto_signer_commitment\x18\x05 \x01(\x0b\x32\x30.shiftcrypto.bitbox02.AntiKleptoSignerCommitmentH\x00\x42\n\n\x08response*/\n\x07\x42TCCoin\x12\x07\n\x03\x42TC\x10\x00\x12\x08\n\x04TBTC\x10\x01\x12\x07\n\x03LTC\x10\x02\x12\x08\n\x04TLTC\x10\x03*R\n\rBTCOutputType\x12\x0b\n\x07UNKNOWN\x10\x00\x12\t\n\x05P2PKH\x10\x01\x12\x08\n\x04P2SH\x10\x02\x12\n\n\x06P2WPKH\x10\x03\x12\t\n\x05P2WSH\x10\x04\x12\x08\n\x04P2TR\x10\x05\x62\x06proto3')
+DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\tbtc.proto\x12\x14shiftcrypto.bitbox02\x1a\x0c\x63ommon.proto\x1a\x10\x61ntiklepto.proto\"\xc6\x04\n\x0f\x42TCScriptConfig\x12G\n\x0bsimple_type\x18\x01 \x01(\x0e\x32\x30.shiftcrypto.bitbox02.BTCScriptConfig.SimpleTypeH\x00\x12\x42\n\x08multisig\x18\x02 \x01(\x0b\x32..shiftcrypto.bitbox02.BTCScriptConfig.MultisigH\x00\x12>\n\x06policy\x18\x03 \x01(\x0b\x32,.shiftcrypto.bitbox02.BTCScriptConfig.PolicyH\x00\x1a\xd9\x01\n\x08Multisig\x12\x11\n\tthreshold\x18\x01 \x01(\r\x12)\n\x05xpubs\x18\x02 \x03(\x0b\x32\x1a.shiftcrypto.bitbox02.XPub\x12\x16\n\x0eour_xpub_index\x18\x03 \x01(\r\x12N\n\x0bscript_type\x18\x04 \x01(\x0e\x32\x39.shiftcrypto.bitbox02.BTCScriptConfig.Multisig.ScriptType\"\'\n\nScriptType\x12\t\n\x05P2WSH\x10\x00\x12\x0e\n\nP2WSH_P2SH\x10\x01\x1aK\n\x06Policy\x12\x0e\n\x06policy\x18\x01 \x01(\t\x12\x31\n\x04keys\x18\x02 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\x01(\x0b\x32\x30.shiftcrypto.bitbox02.AntiKleptoSignerCommitment\"\x82\x01\n\x04Type\x12\t\n\x05INPUT\x10\x00\x12\n\n\x06OUTPUT\x10\x01\x12\x08\n\x04\x44ONE\x10\x02\x12\x0f\n\x0bPREVTX_INIT\x10\x03\x12\x10\n\x0cPREVTX_INPUT\x10\x04\x12\x11\n\rPREVTX_OUTPUT\x10\x05\x12\x0e\n\nHOST_NONCE\x10\x06\x12\x13\n\x0fPAYMENT_REQUEST\x10\x07\"\xea\x01\n\x13\x42TCSignInputRequest\x12\x13\n\x0bprevOutHash\x18\x01 \x01(\x0c\x12\x14\n\x0cprevOutIndex\x18\x02 \x01(\r\x12\x14\n\x0cprevOutValue\x18\x03 \x01(\x04\x12\x10\n\x08sequence\x18\x04 \x01(\r\x12\x0f\n\x07keypath\x18\x06 \x03(\r\x12\x1b\n\x13script_config_index\x18\x07 \x01(\r\x12R\n\x15host_nonce_commitment\x18\x08 \x01(\x0b\x32\x33.shiftcrypto.bitbox02.AntiKleptoHostNonceCommitment\"\xe3\x01\n\x14\x42TCSignOutputRequest\x12\x0c\n\x04ours\x18\x01 \x01(\x08\x12\x31\n\x04type\x18\x02 \x01(\x0e\x32#.shiftcrypto.bitbox02.BTCOutputType\x12\r\n\x05value\x18\x03 \x01(\x04\x12\x0f\n\x07payload\x18\x04 \x01(\x0c\x12\x0f\n\x07keypath\x18\x05 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\x01(\x0b\x32,.shiftcrypto.bitbox02.BTCSignMessageResponseH\x00\x12X\n\x1c\x61ntiklepto_signer_commitment\x18\x05 \x01(\x0b\x32\x30.shiftcrypto.bitbox02.AntiKleptoSignerCommitmentH\x00\x42\n\n\x08response*9\n\x07\x42TCCoin\x12\x07\n\x03\x42TC\x10\x00\x12\x08\n\x04TBTC\x10\x01\x12\x07\n\x03LTC\x10\x02\x12\x08\n\x04TLTC\x10\x03\x12\x08\n\x04RBTC\x10\x04*R\n\rBTCOutputType\x12\x0b\n\x07UNKNOWN\x10\x00\x12\t\n\x05P2PKH\x10\x01\x12\x08\n\x04P2SH\x10\x02\x12\n\n\x06P2WPKH\x10\x03\x12\t\n\x05P2WSH\x10\x04\x12\x08\n\x04P2TR\x10\x05\x62\x06proto3')
 
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, globals())
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'btc_pb2', globals())
@@ -23,9 +23,9 @@
 
   DESCRIPTOR._options = None
   _BTCCOIN._serialized_start=4837
-  _BTCCOIN._serialized_end=4884
-  _BTCOUTPUTTYPE._serialized_start=4886
-  _BTCOUTPUTTYPE._serialized_end=4968
+  _BTCCOIN._serialized_end=4894
+  _BTCOUTPUTTYPE._serialized_start=4896
+  _BTCOUTPUTTYPE._serialized_end=4978
   _BTCSCRIPTCONFIG._serialized_start=68
   _BTCSCRIPTCONFIG._serialized_end=650
   _BTCSCRIPTCONFIG_MULTISIG._serialized_start=293
diff --git a/py/bitbox02/bitbox02/communication/generated/btc_pb2.pyi b/py/bitbox02/bitbox02/communication/generated/btc_pb2.pyi
index afcc61803..3a880b8af 100644
--- a/py/bitbox02/bitbox02/communication/generated/btc_pb2.pyi
+++ b/py/bitbox02/bitbox02/communication/generated/btc_pb2.pyi
@@ -23,6 +23,9 @@ class _BTCCoinEnumTypeWrapper(google.protobuf.internal.enum_type_wrapper._EnumTy
     TBTC: _BTCCoin.ValueType  # 1
     LTC: _BTCCoin.ValueType  # 2
     TLTC: _BTCCoin.ValueType  # 3
+    RBTC: _BTCCoin.ValueType  # 4
+    """Regtest"""
+
 class BTCCoin(_BTCCoin, metaclass=_BTCCoinEnumTypeWrapper):
     pass
 
@@ -30,6 +33,9 @@ BTC: BTCCoin.ValueType  # 0
 TBTC: BTCCoin.ValueType  # 1
 LTC: BTCCoin.ValueType  # 2
 TLTC: BTCCoin.ValueType  # 3
+RBTC: BTCCoin.ValueType  # 4
+"""Regtest"""
+
 global___BTCCoin = BTCCoin
 
 
diff --git a/src/rust/bitbox02-rust/src/hww/api/bitcoin.rs b/src/rust/bitbox02-rust/src/hww/api/bitcoin.rs
index 36c0c0c20..b03268a7c 100644
--- a/src/rust/bitbox02-rust/src/hww/api/bitcoin.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/bitcoin.rs
@@ -88,7 +88,7 @@ pub async fn antiklepto_get_host_nonce(
 fn coin_enabled(coin: pb::BtcCoin) -> Result<(), Error> {
     use pb::BtcCoin::*;
     #[cfg(feature = "app-bitcoin")]
-    if let Btc | Tbtc = coin {
+    if let Btc | Tbtc | Rbtc = coin {
         return Ok(());
     }
     #[cfg(feature = "app-litecoin")]
@@ -580,7 +580,7 @@ mod tests {
         assert!(block_on(process_pub(&req_invalid)).is_err());
         // -- Wrong coin: MAX + 1
         let mut req_invalid = req.clone();
-        req_invalid.coin = BtcCoin::Tltc as i32 + 1;
+        req_invalid.coin = BtcCoin::Rbtc as i32 + 1;
         assert!(block_on(process_pub(&req_invalid)).is_err());
     }
 
@@ -690,6 +690,15 @@ mod tests {
                 expected_address: "tb1qnlyrq9pshg0v0lsuudjgga4nvmjxhcvketqwdg",
                 expected_display_title: "BTC Testnet",
             },
+            // RBTC P2WPKH
+            Test {
+                mnemonic: TEST_MNEMONIC,
+                coin: BtcCoin::Rbtc,
+                keypath: &[84 + HARDENED, 1 + HARDENED, 0 + HARDENED, 0, 0],
+                simple_type: SimpleType::P2wpkh,
+                expected_address: "bcrt1qnlyrq9pshg0v0lsuudjgga4nvmjxhcvkmzer6p",
+                expected_display_title: "BTC Regtest",
+            },
             // LTC P2WPKH-P2SH
             Test {
                 mnemonic: TEST_MNEMONIC,
diff --git a/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs b/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs
index b3c33ada6..fe09a3027 100644
--- a/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs
@@ -47,6 +47,10 @@ pub fn format_amount(
             FormatUnit::Default => (8, "TBTC"),
             FormatUnit::Sat => (0, "tsat"),
         },
+        BtcCoin::Rbtc => match format_unit {
+            FormatUnit::Default => (8, "RBTC"),
+            FormatUnit::Sat => (0, "rsat"),
+        },
         BtcCoin::Ltc => match format_unit {
             FormatUnit::Default => (8, "LTC"),
             _ => return Err(Error::InvalidInput),
diff --git a/src/rust/bitbox02-rust/src/hww/api/bitcoin/multisig.rs b/src/rust/bitbox02-rust/src/hww/api/bitcoin/multisig.rs
index 60ec0dfc6..f3d87d853 100644
--- a/src/rust/bitbox02-rust/src/hww/api/bitcoin/multisig.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/bitcoin/multisig.rs
@@ -55,6 +55,7 @@ pub fn get_hash(
             BtcCoin::Tbtc => 0x01,
             BtcCoin::Ltc => 0x02,
             BtcCoin::Tltc => 0x03,
+            BtcCoin::Rbtc => 0x04,
         };
         hasher.update(byte.to_le_bytes());
     }
@@ -204,14 +205,14 @@ pub async fn confirm_extended(
                 ScriptType::P2wsh => bip32::XPubType::CapitalZpub,
                 ScriptType::P2wshP2sh => bip32::XPubType::CapitalYpub,
             },
-            BtcCoin::Tbtc | BtcCoin::Tltc => match script_type {
+            BtcCoin::Tbtc | BtcCoin::Rbtc | BtcCoin::Tltc => match script_type {
                 ScriptType::P2wsh => bip32::XPubType::CapitalVpub,
                 ScriptType::P2wshP2sh => bip32::XPubType::CapitalUpub,
             },
         },
         XPubType::AutoXpubTpub => match params.coin {
             BtcCoin::Btc | BtcCoin::Ltc => bip32::XPubType::Xpub,
-            BtcCoin::Tbtc | BtcCoin::Tltc => bip32::XPubType::Tpub,
+            BtcCoin::Tbtc | BtcCoin::Rbtc | BtcCoin::Tltc => bip32::XPubType::Tpub,
         },
     };
     let num_cosigners = multisig.xpubs.len();
diff --git a/src/rust/bitbox02-rust/src/hww/api/bitcoin/params.rs b/src/rust/bitbox02-rust/src/hww/api/bitcoin/params.rs
index b293aacb4..175503450 100644
--- a/src/rust/bitbox02-rust/src/hww/api/bitcoin/params.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/bitcoin/params.rs
@@ -60,6 +60,16 @@ const PARAMS_TBTC: Params = Params {
     rbf_support: true,
     taproot_support: true,
 };
+const PARAMS_RBTC: Params = Params {
+    coin: BtcCoin::Rbtc,
+    bip44_coin: 1 + HARDENED,
+    base58_version_p2pkh: 0x6f, // starts with m or n
+    base58_version_p2sh: 0xc4,  // starts with 2
+    bech32_hrp: "bcrt",
+    name: "BTC Regtest",
+    rbf_support: true,
+    taproot_support: true,
+};
 
 const PARAMS_LTC: Params = Params {
     coin: BtcCoin::Ltc,
@@ -88,6 +98,7 @@ pub fn get(coin: BtcCoin) -> &'static Params {
     match coin {
         Btc => &PARAMS_BTC,
         Tbtc => &PARAMS_TBTC,
+        Rbtc => &PARAMS_RBTC,
         Ltc => &PARAMS_LTC,
         Tltc => &PARAMS_TLTC,
     }
diff --git a/src/rust/bitbox02-rust/src/hww/api/bitcoin/policies.rs b/src/rust/bitbox02-rust/src/hww/api/bitcoin/policies.rs
index d7891eedd..b8da788d3 100644
--- a/src/rust/bitbox02-rust/src/hww/api/bitcoin/policies.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/bitcoin/policies.rs
@@ -337,7 +337,7 @@ impl<'a> ParsedPolicy<'a> {
 
         let output_xpub_type = match params.coin {
             BtcCoin::Btc | BtcCoin::Ltc => bip32::XPubType::Xpub,
-            BtcCoin::Tbtc | BtcCoin::Tltc => bip32::XPubType::Tpub,
+            BtcCoin::Tbtc | BtcCoin::Rbtc | BtcCoin::Tltc => bip32::XPubType::Tpub,
         };
         let num_keys = policy.keys.len();
         for (i, key) in policy.keys.iter().enumerate() {
@@ -513,6 +513,7 @@ pub fn get_hash(coin: BtcCoin, policy: &Policy) -> Result<Vec<u8>, ()> {
             BtcCoin::Tbtc => 0x01,
             BtcCoin::Ltc => 0x02,
             BtcCoin::Tltc => 0x03,
+            BtcCoin::Rbtc => 0x04,
         };
         hasher.update(byte.to_le_bytes());
     }
diff --git a/src/rust/bitbox02-rust/src/shiftcrypto.bitbox02.rs b/src/rust/bitbox02-rust/src/shiftcrypto.bitbox02.rs
index dfcf61dc3..8e1fe1960 100644
--- a/src/rust/bitbox02-rust/src/shiftcrypto.bitbox02.rs
+++ b/src/rust/bitbox02-rust/src/shiftcrypto.bitbox02.rs
@@ -846,6 +846,8 @@ pub enum BtcCoin {
     Tbtc = 1,
     Ltc = 2,
     Tltc = 3,
+    /// Regtest
+    Rbtc = 4,
 }
 impl BtcCoin {
     /// String value of the enum field names used in the ProtoBuf definition.
@@ -858,6 +860,7 @@ impl BtcCoin {
             BtcCoin::Tbtc => "TBTC",
             BtcCoin::Ltc => "LTC",
             BtcCoin::Tltc => "TLTC",
+            BtcCoin::Rbtc => "RBTC",
         }
     }
     /// Creates an enum from field names used in the ProtoBuf definition.
@@ -867,6 +870,7 @@ impl BtcCoin {
             "TBTC" => Some(Self::Tbtc),
             "LTC" => Some(Self::Ltc),
             "TLTC" => Some(Self::Tltc),
+            "RBTC" => Some(Self::Rbtc),
             _ => None,
         }
     }