diff --git a/trezorctl b/trezorctl
index a224ed419a..d461749c3f 100755
--- a/trezorctl
+++ b/trezorctl
@@ -677,7 +677,7 @@ def sign_tx(connect, coin):
         sequence = click.prompt(
             "Sequence Number to use (RBF opt-in enabled by default)",
             type=int,
-            default=0xfffffffd,
+            default=0xFFFFFFFD,
         )
         script_type = click.prompt(
             "Input type",
diff --git a/trezorlib/client.py b/trezorlib/client.py
index 82fd820b34..6e8f12fe7e 100644
--- a/trezorlib/client.py
+++ b/trezorlib/client.py
@@ -74,7 +74,7 @@ except ImportError:
     def getch():
         while True:
             key = msvcrt.getch()
-            if key in (0x00, 0xe0):
+            if key in (0x00, 0xE0):
                 # skip special keys: read the scancode and repeat
                 msvcrt.getch()
                 continue
diff --git a/trezorlib/firmware.py b/trezorlib/firmware.py
index 41c666f8f1..acdbbeab75 100644
--- a/trezorlib/firmware.py
+++ b/trezorlib/firmware.py
@@ -1,4 +1,3 @@
-
 import construct as c
 import pyblake2
 
@@ -6,7 +5,7 @@ from . import cosi, messages as proto, tools
 
 
 def bytes_not(data):
-    return bytes(~b & 0xff for b in data)
+    return bytes(~b & 0xFF for b in data)
 
 
 # fmt: off
diff --git a/trezorlib/lisk.py b/trezorlib/lisk.py
index fe571c6062..a86f1af961 100644
--- a/trezorlib/lisk.py
+++ b/trezorlib/lisk.py
@@ -1,4 +1,3 @@
-
 from . import messages as proto
 from .protobuf import dict_to_proto
 from .tools import CallException, dict_from_camelcase, expect, normalize_nfc
diff --git a/trezorlib/protobuf.py b/trezorlib/protobuf.py
index 2a346f8bae..c94362c8c8 100644
--- a/trezorlib/protobuf.py
+++ b/trezorlib/protobuf.py
@@ -356,7 +356,7 @@ def format_message(
     def mostly_printable(bytes):
         if not bytes:
             return True
-        printable = sum(1 for byte in bytes if 0x20 <= byte <= 0x7e)
+        printable = sum(1 for byte in bytes if 0x20 <= byte <= 0x7E)
         return printable / len(bytes) > 0.8
 
     def pformat_value(value: Any, indent: int) -> str:
diff --git a/trezorlib/stellar.py b/trezorlib/stellar.py
index fac24f49cb..2471704be0 100644
--- a/trezorlib/stellar.py
+++ b/trezorlib/stellar.py
@@ -336,7 +336,7 @@ def _crc16_checksum(bytes):
             if c15 ^ bit:
                 crc ^= polynomial
 
-    return crc & 0xffff
+    return crc & 0xFFFF
 
 
 # ====== Client functions ====== #
diff --git a/trezorlib/tests/device_tests/test_bip32_speed.py b/trezorlib/tests/device_tests/test_bip32_speed.py
index b1aeeeaae6..91072b238a 100644
--- a/trezorlib/tests/device_tests/test_bip32_speed.py
+++ b/trezorlib/tests/device_tests/test_bip32_speed.py
@@ -70,4 +70,4 @@ class TestBip32Speed(TrezorTest):
         print("CACHED TIME", cache_time)
 
         # Cached time expected to be at least 2x faster
-        assert cache_time <= nocache_time / 2.
+        assert cache_time <= nocache_time / 2.0
diff --git a/trezorlib/tests/device_tests/test_msg_ethereum_signtx.py b/trezorlib/tests/device_tests/test_msg_ethereum_signtx.py
index 33805139a6..d6d5ab793e 100644
--- a/trezorlib/tests/device_tests/test_msg_ethereum_signtx.py
+++ b/trezorlib/tests/device_tests/test_msg_ethereum_signtx.py
@@ -366,8 +366,8 @@ class TestMsgEthereumSigntx(TrezorTest):
                 self.client,
                 n=[0, 0],
                 nonce=123456,
-                gas_price=0xffffffffffffffffffffffffffffffff,
-                gas_limit=0xffffffffffffffffffffffffffffff,
+                gas_price=0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,
+                gas_limit=0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,
                 to=TO_ADDR,
                 value=12345678901234567890,
             )
diff --git a/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_add_attributes.py b/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_add_attributes.py
index 1d1343ab3b..0a336d7bc8 100644
--- a/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_add_attributes.py
+++ b/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_add_attributes.py
@@ -33,8 +33,8 @@ class TestMsgOntologySignOntIdAddAttributes(TrezorTest):
 
         transaction = messages.OntologyTransaction(
             version=0x00,
-            nonce=0x7f7f1ceb,
-            type=0xd1,
+            nonce=0x7F7F1CEB,
+            type=0xD1,
             gas_price=500,
             gas_limit=30000,
             payer="AGn8JFPGM5S4jkWhTC89Xtz1Y76sPz29Rc",
diff --git a/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_register.py b/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_register.py
index bc3bc6cf67..ac6b7cb644 100644
--- a/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_register.py
+++ b/trezorlib/tests/device_tests/test_msg_ontology_sign_ont_id_register.py
@@ -33,8 +33,8 @@ class TestMsgOntologySignOntIdRegister(TrezorTest):
 
         transaction = messages.OntologyTransaction(
             version=0x00,
-            nonce=0x7f7f1ceb,
-            type=0xd1,
+            nonce=0x7F7F1CEB,
+            type=0xD1,
             gas_price=500,
             gas_limit=30000,
             payer="AGn8JFPGM5S4jkWhTC89Xtz1Y76sPz29Rc",
diff --git a/trezorlib/tests/device_tests/test_msg_ontology_sign_tx.py b/trezorlib/tests/device_tests/test_msg_ontology_sign_tx.py
index fe8b37549c..be0f9fe203 100644
--- a/trezorlib/tests/device_tests/test_msg_ontology_sign_tx.py
+++ b/trezorlib/tests/device_tests/test_msg_ontology_sign_tx.py
@@ -31,8 +31,8 @@ class TestMsgOntologySigntx(TrezorTest):
 
         transaction = messages.OntologyTransaction(
             version=0x00,
-            nonce=0x7f7f1ceb,
-            type=0xd1,
+            nonce=0x7F7F1CEB,
+            type=0xD1,
             gas_price=500,
             gas_limit=30000,
             payer="AGn8JFPGM5S4jkWhTC89Xtz1Y76sPz29Rc",
@@ -63,8 +63,8 @@ class TestMsgOntologySigntx(TrezorTest):
 
         transaction = messages.OntologyTransaction(
             version=0x00,
-            nonce=0x7f7f1ceb,
-            type=0xd1,
+            nonce=0x7F7F1CEB,
+            type=0xD1,
             gas_price=500,
             gas_limit=30000,
             payer="AGn8JFPGM5S4jkWhTC89Xtz1Y76sPz29Rc",
diff --git a/trezorlib/tests/device_tests/test_msg_ontology_sign_withdraw_ong.py b/trezorlib/tests/device_tests/test_msg_ontology_sign_withdraw_ong.py
index e66d473db5..6bcfa442d4 100644
--- a/trezorlib/tests/device_tests/test_msg_ontology_sign_withdraw_ong.py
+++ b/trezorlib/tests/device_tests/test_msg_ontology_sign_withdraw_ong.py
@@ -31,8 +31,8 @@ class TestMsgOntologySignWithdraw(TrezorTest):
 
         transaction = messages.OntologyTransaction(
             version=0x00,
-            nonce=0x7f7f1ceb,
-            type=0xd1,
+            nonce=0x7F7F1CEB,
+            type=0xD1,
             gas_price=500,
             gas_limit=30000,
             payer="AGn8JFPGM5S4jkWhTC89Xtz1Y76sPz29Rc",
diff --git a/trezorlib/tests/device_tests/test_msg_stellar_sign_transaction.py b/trezorlib/tests/device_tests/test_msg_stellar_sign_transaction.py
index 42c175e50e..87538c4919 100644
--- a/trezorlib/tests/device_tests/test_msg_stellar_sign_transaction.py
+++ b/trezorlib/tests/device_tests/test_msg_stellar_sign_transaction.py
@@ -68,7 +68,7 @@ class TestMsgStellarSignTransaction(TrezorTest):
         self.setup_mnemonic_nopin_nopassphrase()
 
         op = proto.StellarBumpSequenceOp()
-        op.bump_to = 0x7fffffffffffffff
+        op.bump_to = 0x7FFFFFFFFFFFFFFF
         tx = self._create_msg()
 
         response = stellar.sign_tx(
diff --git a/trezorlib/tests/unit_tests/test_protobuf.py b/trezorlib/tests/unit_tests/test_protobuf.py
index 0ea04ea094..cdc2a8aa69 100644
--- a/trezorlib/tests/unit_tests/test_protobuf.py
+++ b/trezorlib/tests/unit_tests/test_protobuf.py
@@ -47,7 +47,7 @@ def dump_uvarint(value):
 def test_dump_uvarint():
     assert dump_uvarint(0) == b"\x00"
     assert dump_uvarint(1) == b"\x01"
-    assert dump_uvarint(0xff) == b"\xff\x01"
+    assert dump_uvarint(0xFF) == b"\xff\x01"
     assert dump_uvarint(123456) == b"\xc0\xc4\x07"
 
     with pytest.raises(ValueError):
@@ -57,7 +57,7 @@ def test_dump_uvarint():
 def test_load_uvarint():
     assert load_uvarint(b"\x00") == 0
     assert load_uvarint(b"\x01") == 1
-    assert load_uvarint(b"\xff\x01") == 0xff
+    assert load_uvarint(b"\xff\x01") == 0xFF
     assert load_uvarint(b"\xc0\xc4\x07") == 123456
 
 
diff --git a/trezorlib/transport/hid.py b/trezorlib/transport/hid.py
index 4c7bf33545..e226bb172c 100644
--- a/trezorlib/transport/hid.py
+++ b/trezorlib/transport/hid.py
@@ -23,9 +23,9 @@ from . import Transport, TransportException
 from ..protocol_v1 import ProtocolV1
 from ..protocol_v2 import ProtocolV2
 
-DEV_TREZOR1 = (0x534c, 0x0001)
-DEV_TREZOR2 = (0x1209, 0x53c1)
-DEV_TREZOR2_BL = (0x1209, 0x53c0)
+DEV_TREZOR1 = (0x534C, 0x0001)
+DEV_TREZOR2 = (0x1209, 0x53C1)
+DEV_TREZOR2_BL = (0x1209, 0x53C0)
 
 
 class HidHandle:
diff --git a/trezorlib/transport/webusb.py b/trezorlib/transport/webusb.py
index b2efd98d82..6098a24300 100644
--- a/trezorlib/transport/webusb.py
+++ b/trezorlib/transport/webusb.py
@@ -24,9 +24,9 @@ from . import Transport, TransportException
 from ..protocol_v1 import ProtocolV1
 from ..protocol_v2 import ProtocolV2
 
-DEV_TREZOR1 = (0x534c, 0x0001)
-DEV_TREZOR2 = (0x1209, 0x53c1)
-DEV_TREZOR2_BL = (0x1209, 0x53c0)
+DEV_TREZOR1 = (0x534C, 0x0001)
+DEV_TREZOR2 = (0x1209, 0x53C1)
+DEV_TREZOR2_BL = (0x1209, 0x53C0)
 
 INTERFACE = 0
 ENDPOINT = 1
diff --git a/trezorlib/tx_api.py b/trezorlib/tx_api.py
index 7f3d2a56d2..750d172d15 100644
--- a/trezorlib/tx_api.py
+++ b/trezorlib/tx_api.py
@@ -97,7 +97,7 @@ class TxApiInsight(TxApi):
             i = t._add_inputs()
             if "coinbase" in vin.keys():
                 i.prev_hash = b"\0" * 32
-                i.prev_index = 0xffffffff  # signed int -1
+                i.prev_index = 0xFFFFFFFF  # signed int -1
                 i.script_sig = bytes.fromhex(vin["coinbase"])
                 i.sequence = vin["sequence"]
 
@@ -111,7 +111,7 @@ class TxApiInsight(TxApi):
             o = t._add_bin_outputs()
             o.amount = int(Decimal(vout["value"]) * 100000000)
             o.script_pubkey = bytes.fromhex(vout["scriptPubKey"]["hex"])
-            if self.bip115 and o.script_pubkey[-1] == 0xb4:
+            if self.bip115 and o.script_pubkey[-1] == 0xB4:
                 # Verify if coin implements replay protection bip115 and script includes checkblockatheight opcode. 0xb4 - is op_code (OP_CHECKBLOCKATHEIGHT)
                 # <OP_32> <32-byte block hash> <OP_3> <3-byte block height> <OP_CHECKBLOCKATHEIGHT>
                 tail = o.script_pubkey[-38:]