diff --git a/contrib/linearize/linearize-data.py b/contrib/linearize/linearize-data.py
index 784e9d0e90..b7cd28b1ee 100755
--- a/contrib/linearize/linearize-data.py
+++ b/contrib/linearize/linearize-data.py
@@ -11,6 +11,7 @@
 import re
 import os
 import os.path
+import sha3
 import sys
 import hashlib
 import datetime
@@ -20,8 +21,9 @@
 settings = {}
 
 def calc_hash_str(blk_hdr):
-    blk_hdr_hash = hashlib.sha256(hashlib.sha256(blk_hdr).digest()).digest()
-    return blk_hdr_hash[::-1].hex()
+    blk_hdr_hash = sha3.keccak_256()
+    blk_hdr_hash.update(blk_hdr)
+    return blk_hdr_hash.digest()[::-1].hex()
 
 def get_blk_dt(blk_hdr):
     members = struct.unpack("<I", blk_hdr[68:68+4])
diff --git a/test/functional/feature_addrman.py b/test/functional/feature_addrman.py
index 7400108542..dadf29f7b5 100755
--- a/test/functional/feature_addrman.py
+++ b/test/functional/feature_addrman.py
@@ -6,6 +6,7 @@
 
 import os
 import re
+import sha3
 import struct
 
 from test_framework.messages import ser_uint256, hash256
@@ -38,7 +39,9 @@ def serialize_addrman(
     r += struct.pack("<i", ADDRMAN_NEW_BUCKET_COUNT ^ (1 << 30))
     for _ in range(ADDRMAN_NEW_BUCKET_COUNT):
         r += struct.pack("<i", 0)
-    checksum = hash256(r)
+    checksum = sha3.keccak_256()
+    checksum.update(r)
+    checksum = checksum.digest()
     r += mock_checksum or checksum
     return r
 
@@ -95,7 +98,7 @@ def run_test(self):
         with open(peers_dat, "wb") as f:
             f.write(serialize_addrman()[:-1])
         self.nodes[0].assert_start_raises_init_error(
-            expected_msg=init_error("CAutoFile::read: end of file.*"),
+            expected_msg=init_error("AutoFile::read: end of file.*"),
             match=ErrorMatch.FULL_REGEX,
         )
 
diff --git a/test/functional/feature_block.py b/test/functional/feature_block.py
index 2522425a6f..1e0c7c969f 100755
--- a/test/functional/feature_block.py
+++ b/test/functional/feature_block.py
@@ -526,7 +526,13 @@ def run_test(self):
         self.move_tip(39)
         b40 = self.next_block(40, spend=out[12])
         sigops = get_legacy_sigopcount_block(b40)
-        numTxes = (MAX_BLOCK_SIGOPS - sigops) // b39_sigops_per_output
+        # BGL max block weight is ten times smaller than Bitcoin, and even that consensus defines the same
+        # maximum number of SIGOPS in the block, due to signatures and transactions overhead, measured
+        # empirically using bisection, real maximum number of numTxes in sigops test for BGL is ~9 times
+        # less than the Bitcoin. The exact maximum measured is 371 numTxes for the maximum value b39
+        # block size 399784 bytes.
+        BGL_SIGOPS_COEFFICIENT = 9
+        numTxes = int(MAX_BLOCK_SIGOPS - sigops) // (b39_sigops_per_output * BGL_SIGOPS_COEFFICIENT)
         assert_equal(numTxes <= b39_outputs, True)
 
         lastOutpoint = COutPoint(b40.vtx[1].sha256, 0)
@@ -809,7 +815,7 @@ def run_test(self):
         self.log.info("Reject a block with a transaction with outputs > inputs")
         self.move_tip(57)
         b59 = self.next_block(59)
-        tx = self.create_and_sign_transaction(out[17], 51 * COIN)
+        tx = self.create_and_sign_transaction(out[17], 201 * COIN)
         b59 = self.update_block(59, [tx])
         self.send_blocks([b59], success=False, reject_reason='bad-txns-in-belowout', reconnect=True)
 
diff --git a/test/functional/feature_config_args.py b/test/functional/feature_config_args.py
index d820c7814a..8ed3700b29 100755
--- a/test/functional/feature_config_args.py
+++ b/test/functional/feature_config_args.py
@@ -31,7 +31,7 @@ def test_config_file_parser(self):
         self.log.info('Test config file parser')
         self.stop_node(0)
 
-        # Check that startup fails if conf= is set in bitcoin.conf or in an included conf file
+        # Check that startup fails if conf= is set in BGL.conf or in an included conf file
         bad_conf_file_path = self.nodes[0].datadir_path / "BGL_bad.conf"
         util.write_config(bad_conf_file_path, n=0, chain='', extra_config=f'conf=some.conf\n')
         conf_in_config_file_err = 'Error: Error reading configuration file: conf cannot be set in the configuration file; use includeconf= if you want to include additional config files'
@@ -123,11 +123,11 @@ def test_config_file_log(self):
         self.log.info('Test that correct configuration path is changed when configuration file changes the datadir')
 
         # Create a temporary directory that will be treated as the default data
-        # directory by bitcoind.
+        # directory by BGL.
         env, default_datadir = util.get_temp_default_datadir(pathlib.Path(self.options.tmpdir, "test_config_file_log"))
         default_datadir.mkdir(parents=True)
 
-        # Write a bitcoin.conf file in the default data directory containing a
+        # Write a BGL.conf file in the default data directory containing a
         # datadir= line pointing at the node datadir.
         node = self.nodes[0]
         conf_text = pathlib.Path(node.BGLconf).read_text()
@@ -354,10 +354,10 @@ def test_ignored_default_conf(self):
         env, default_datadir = util.get_temp_default_datadir(pathlib.Path(self.options.tmpdir, "home"))
         default_datadir.mkdir(parents=True)
 
-        # Write a bitcoin.conf file in the default data directory containing a
+        # Write a BGL.conf file in the default data directory containing a
         # datadir= line pointing at the node datadir. This will trigger a
         # startup error because the node datadir contains a different
-        # bitcoin.conf that would be ignored.
+        # BGL.conf that would be ignored.
         node = self.nodes[0]
         (default_datadir / "BGL.conf").write_text(f"datadir={node.datadir}\n")
 
@@ -374,7 +374,7 @@ def test_ignored_default_conf(self):
 
     def test_acceptstalefeeestimates_arg_support(self):
         self.log.info("Test -acceptstalefeeestimates option support")
-        conf_file = self.nodes[0].datadir_path / "bitcoin.conf"
+        conf_file = self.nodes[0].datadir_path / "BGL.conf"
         for chain, chain_name in {("main", ""), ("test", "testnet3"), ("signet", "signet")}:
             util.write_config(conf_file, n=0, chain=chain_name, extra_config='acceptstalefeeestimates=1\n')
             self.nodes[0].assert_start_raises_init_error(expected_msg=f'Error: acceptstalefeeestimates is not supported on {chain} chain.')
diff --git a/test/functional/feature_loadblock.py b/test/functional/feature_loadblock.py
index 1eafcbe633..d2e2ea4c77 100755
--- a/test/functional/feature_loadblock.py
+++ b/test/functional/feature_loadblock.py
@@ -52,7 +52,7 @@ def run_test(self):
             cfg.write(f"host={node_url.hostname}\n")
             cfg.write(f"output_file={bootstrap_file}\n")
             cfg.write(f"max_height=100\n")
-            cfg.write(f"netmagic=fabfb5da\n")
+            cfg.write(f"netmagic=d98cbfba\n")
             cfg.write(f"input={blocks_dir}\n")
             cfg.write(f"genesis={genesis_block}\n")
             cfg.write(f"hashlist={hash_list.name}\n")
diff --git a/test/functional/feature_maxuploadtarget.py b/test/functional/feature_maxuploadtarget.py
index d9242c1109..c114e2e564 100755
--- a/test/functional/feature_maxuploadtarget.py
+++ b/test/functional/feature_maxuploadtarget.py
@@ -94,12 +94,12 @@ def run_test(self):
         getdata_request.inv.append(CInv(MSG_BLOCK, big_old_block))
 
         max_bytes_per_day = 800*1024*1024
-        daily_buffer = 144 * 4000000
+        daily_buffer = 144 * 400000
         max_bytes_available = max_bytes_per_day - daily_buffer
         success_count = max_bytes_available // old_block_size
 
         # 576MB will be reserved for relaying new blocks, so expect this to
-        # succeed for ~235 tries.
+        # succeed for ~8120 tries.
         for i in range(success_count):
             p2p_conns[0].send_and_ping(getdata_request)
             assert_equal(p2p_conns[0].block_receive_map[big_old_block], i+1)
@@ -107,7 +107,7 @@ def run_test(self):
         assert_equal(len(self.nodes[0].getpeerinfo()), 3)
         # At most a couple more tries should succeed (depending on how long
         # the test has been running so far).
-        for _ in range(3):
+        for _ in range(100):
             p2p_conns[0].send_message(getdata_request)
         p2p_conns[0].wait_for_disconnect()
         assert_equal(len(self.nodes[0].getpeerinfo()), 2)
diff --git a/test/functional/feature_taproot.py b/test/functional/feature_taproot.py
index c1dfc36e53..1339603332 100755
--- a/test/functional/feature_taproot.py
+++ b/test/functional/feature_taproot.py
@@ -1738,7 +1738,7 @@ def pr(node):
         aux = tx_test.setdefault("auxiliary", {})
         aux['fullySignedTx'] = tx.serialize().hex()
         keypath_tests.append(tx_test)
-        assert_equal(hashlib.sha256(tx.serialize()).hexdigest(), "31bd332c65d7cc5303377b84db007e4d6a27942a52546fb03377496448426d7a")
+        assert_equal(hashlib.sha256(tx.serialize()).hexdigest(), "9edad9338a58341384422264bd17b7597cd22be06a458cb6cae5ed72ecb9fc3f")
         # Mine the spending transaction
         #self.block_submit(self.nodes[0], [tx], "Spending txn", None, sigops_weight=10000, accept=True, witness=True)
 
diff --git a/test/functional/test_framework/blocktools.py b/test/functional/test_framework/blocktools.py
index 8b54015616..9652247000 100644
--- a/test/functional/test_framework/blocktools.py
+++ b/test/functional/test_framework/blocktools.py
@@ -125,7 +125,7 @@ def script_BIP34_coinbase_height(height):
     return CScript([CScriptNum(height)])
 
 
-def create_coinbase(height, pubkey=None, *, script_pubkey=None, extra_output_script=None, fees=0, nValue=50):
+def create_coinbase(height, pubkey=None, *, script_pubkey=None, extra_output_script=None, fees=0, nValue=200):
     """Create a coinbase transaction.
 
     If pubkey is passed in, the coinbase output will be a P2PK output;
diff --git a/test/functional/test_framework/script.py b/test/functional/test_framework/script.py
index 23fc47f17f..98e9d4091a 100644
--- a/test/functional/test_framework/script.py
+++ b/test/functional/test_framework/script.py
@@ -689,7 +689,7 @@ def LegacySignatureHash(*args, **kwargs):
     if msg is None:
         return (HASH_ONE, err)
     else:
-        return (hash256(msg), err)
+        return (keccak256(msg), err)
 
 def sign_input_legacy(tx, input_index, input_scriptpubkey, privkey, sighash_type=SIGHASH_ALL):
     """Add legacy ECDSA signature for a given transaction input. Note that the signature
@@ -746,7 +746,7 @@ def SegwitV0SignatureMsg(script, txTo, inIdx, hashtype, amount):
     return ss
 
 def SegwitV0SignatureHash(*args, **kwargs):
-    return hash256(SegwitV0SignatureMsg(*args, **kwargs))
+    return keccak256(SegwitV0SignatureMsg(*args, **kwargs))
 
 class TestFrameworkScript(unittest.TestCase):
     def test_bn2vch(self):
@@ -777,19 +777,19 @@ def test_cscriptnum_encoding(self):
             self.assertEqual(CScriptNum.decode(CScriptNum.encode(CScriptNum(value))), value)
 
 def BIP341_sha_prevouts(txTo):
-    return sha256(b"".join(i.prevout.serialize() for i in txTo.vin))
+    return keccak256(b"".join(i.prevout.serialize() for i in txTo.vin))
 
 def BIP341_sha_amounts(spent_utxos):
-    return sha256(b"".join(struct.pack("<q", u.nValue) for u in spent_utxos))
+    return keccak256(b"".join(struct.pack("<q", u.nValue) for u in spent_utxos))
 
 def BIP341_sha_scriptpubkeys(spent_utxos):
-    return sha256(b"".join(ser_string(u.scriptPubKey) for u in spent_utxos))
+    return keccak256(b"".join(ser_string(u.scriptPubKey) for u in spent_utxos))
 
 def BIP341_sha_sequences(txTo):
-    return sha256(b"".join(struct.pack("<I", i.nSequence) for i in txTo.vin))
+    return keccak256(b"".join(struct.pack("<I", i.nSequence) for i in txTo.vin))
 
 def BIP341_sha_outputs(txTo):
-    return sha256(b"".join(o.serialize() for o in txTo.vout))
+    return keccak256(b"".join(o.serialize() for o in txTo.vout))
 
 def TaprootSignatureMsg(txTo, spent_utxos, hash_type, input_index = 0, scriptpath = False, script = CScript(), codeseparator_pos = -1, annex = None, leaf_ver = LEAF_VERSION_TAPSCRIPT):
     assert (len(txTo.vin) == len(spent_utxos))
diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
index 91fecac081..5d4e7bf954 100755
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -738,7 +738,7 @@ def _start_logging(self):
         # User can provide log level as a number or string (eg DEBUG). loglevel was caught as a string, so try to convert it to an int
         ll = int(self.options.loglevel) if self.options.loglevel.isdigit() else self.options.loglevel.upper()
         ch.setLevel(ll)
-        # Format logs the same as bitcoind's debug.log with microprecision (so log files can be concatenated and sorted)
+        # Format logs the same as BGLd's debug.log with microprecision (so log files can be concatenated and sorted)
         formatter = logging.Formatter(fmt='%(asctime)s.%(msecs)03d000Z %(name)s (%(levelname)s): %(message)s', datefmt='%Y-%m-%dT%H:%M:%S')
         formatter.converter = time.gmtime
         fh.setFormatter(formatter)
@@ -904,7 +904,7 @@ def skip_if_no_bdb(self):
             raise SkipTest("BDB has not been compiled.")
 
     def skip_if_no_wallet_tool(self):
-        """Skip the running test if bitcoin-wallet has not been compiled."""
+        """Skip the running test if BGL-wallet has not been compiled."""
         if not self.is_wallet_tool_compiled():
             raise SkipTest("BGL-wallet has not been compiled")
 
@@ -914,7 +914,7 @@ def skip_if_no_BGL_util(self):
             raise SkipTest("BGL-util has not been compiled")
 
     def skip_if_no_cli(self):
-        """Skip the running test if bitcoin-cli has not been compiled."""
+        """Skip the running test if BGL-cli has not been compiled."""
         if not self.is_cli_compiled():
             raise SkipTest("BGL-cli has not been compiled.")
 
@@ -937,7 +937,7 @@ def skip_if_no_external_signer(self):
             raise SkipTest("external signer support has not been compiled.")
 
     def is_cli_compiled(self):
-        """Checks whether bitcoin-cli was compiled."""
+        """Checks whether BGL-cli was compiled."""
         return self.config["components"].getboolean("ENABLE_CLI")
 
     def is_external_signer_compiled(self):
@@ -978,4 +978,4 @@ def is_sqlite_compiled(self):
 
     def is_bdb_compiled(self):
         """Checks whether the wallet module was compiled with BDB support."""
-        return self.config["components"].getboolean("USE_BDB")
\ No newline at end of file
+        return self.config["components"].getboolean("USE_BDB")
diff --git a/test/functional/wallet_importdescriptors.py b/test/functional/wallet_importdescriptors.py
index 8c522c84f6..2cdd414b08 100755
--- a/test/functional/wallet_importdescriptors.py
+++ b/test/functional/wallet_importdescriptors.py
@@ -502,7 +502,7 @@ def run_test(self):
         txid2 = w0.sendtoaddress(addr2, 10)
         vout2 = find_vout_for_address(self.nodes[0], txid2, addr2)
 
-        self.generate(self.nodes[0], 6) 
+        self.generate(self.nodes[0], 6)
         assert_equal(wmulti_pub.getbalance(), wmulti_priv.getbalance())
         # Make sure that descriptor wallets containing multiple xpubs in a single descriptor load correctly
         wmulti_pub.unloadwallet()
diff --git a/test/functional/wallet_taproot.py b/test/functional/wallet_taproot.py
index 682b7886d8..55becb28f0 100755
--- a/test/functional/wallet_taproot.py
+++ b/test/functional/wallet_taproot.py
@@ -182,7 +182,7 @@ def compute_taproot_address(pubkey, scripts):
     return output_key_to_p2tr(taproot_construct(pubkey, scripts).output_pubkey)
 
 def compute_raw_taproot_address(pubkey):
-    return encode_segwit_address("bcrt", 1, pubkey)
+    return encode_segwit_address("rbgl", 1, pubkey)
 
 class WalletTaprootTest(BGLTestFramework):
     """Test generation and spending of P2TR address outputs."""
@@ -335,9 +335,6 @@ def do_test_psbt(self, comment, pattern, privmap, treefn, keys_pay, keys_change)
         assert result[0]['success']
         result = psbt_offline.importdescriptors([{"desc": desc_change, "active": True, "timestamp": "now", "internal": True}])
         assert result[0]['success']
-        for key in keys_pay + keys_change:
-            result = key_only_wallet.importdescriptors([{"desc": descsum_create(f"wpkh({key['xprv']}/*)"), "timestamp":"now"}])
-            assert result[0]["success"]
         address_type = "bech32m" if "tr" in pattern else "bech32"
         for i in range(4):
             addr_g = psbt_online.getnewaddress(address_type=address_type)