diff --git a/.flake8 b/.flake8
index 7d1af43a8..60680fc2b 100644
--- a/.flake8
+++ b/.flake8
@@ -22,3 +22,5 @@ ignore =
     E741,
     ##### E266: too many leading '#' for block comment
     E266,
+    # W503 line break before binary operator
+    W503,
diff --git a/trezorctl b/trezorctl
index 1e68a2532..e4242a5e6 100755
--- a/trezorctl
+++ b/trezorctl
@@ -348,7 +348,7 @@ def load_device(connect, mnemonic, expand, xprv, pin, passphrase_protection, lab
             passphrase_protection,
             label,
             'english'
-            )
+        )
     if slip0014:
         return debuglink.load_device_by_mnemonic(
             client,
@@ -356,7 +356,7 @@ def load_device(connect, mnemonic, expand, xprv, pin, passphrase_protection, lab
             pin,
             passphrase_protection,
             'SLIP-0014'
-            )
+        )
 
 
 @cli.command(help='Start safe recovery workflow.')
diff --git a/trezorlib/tests/device_tests/test_msg_lisk_getaddress.py b/trezorlib/tests/device_tests/test_msg_lisk_getaddress.py
index 5b6c66150..9a30e910a 100644
--- a/trezorlib/tests/device_tests/test_msg_lisk_getaddress.py
+++ b/trezorlib/tests/device_tests/test_msg_lisk_getaddress.py
@@ -22,6 +22,7 @@ from trezorlib.tools import parse_path
 
 LISK_PATH = parse_path("m/44h/134h/0h/1h")
 
+
 @pytest.mark.lisk
 @pytest.mark.skip_t1
 class TestMsgLiskGetaddress(TrezorTest):
diff --git a/trezorlib/tests/device_tests/test_msg_lisk_getpublickey.py b/trezorlib/tests/device_tests/test_msg_lisk_getpublickey.py
index 87316ea6b..7eb8dde9a 100644
--- a/trezorlib/tests/device_tests/test_msg_lisk_getpublickey.py
+++ b/trezorlib/tests/device_tests/test_msg_lisk_getpublickey.py
@@ -23,6 +23,7 @@ from trezorlib.tools import parse_path
 
 LISK_PATH = parse_path("m/44h/134h/0h/0h")
 
+
 @pytest.mark.lisk
 @pytest.mark.skip_t1
 class TestMsgLiskGetPublicKey(TrezorTest):
diff --git a/trezorlib/tests/device_tests/test_msg_lisk_verifymessage.py b/trezorlib/tests/device_tests/test_msg_lisk_verifymessage.py
index d4018bd30..8fccd3ff8 100644
--- a/trezorlib/tests/device_tests/test_msg_lisk_verifymessage.py
+++ b/trezorlib/tests/device_tests/test_msg_lisk_verifymessage.py
@@ -39,7 +39,7 @@ class TestMsgLiskVerifymessage(TrezorTest):
                 unhexlify('eb56d7bbb5e8ea9269405f7a8527fe126023d1db2c973cfac6f760b60ae27294'),
                 unhexlify('7858ae7cd52ea6d4b17e800ca60144423db5560bfd618b663ffbf26ab66758563df45cbffae8463db22dc285dd94309083b8c807776085b97d05374d79867d05'),
                 'This is an example of a signed message.'
-                )
+            )
 
     def test_verify_long(self):
         self.setup_mnemonic_nopin_nopassphrase()
diff --git a/trezorlib/tests/device_tests/test_msg_verifymessage.py b/trezorlib/tests/device_tests/test_msg_verifymessage.py
index 9f887b97d..154fc5791 100644
--- a/trezorlib/tests/device_tests/test_msg_verifymessage.py
+++ b/trezorlib/tests/device_tests/test_msg_verifymessage.py
@@ -41,7 +41,7 @@ class TestMsgVerifymessage(TrezorTest):
             'mirio8q3gtv7fhdnmb3TpZ4EuafdzSs7zL',
             unhexlify('209e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message.'
-            )
+        )
         assert ret is True
 
     def test_message_verify(self):
@@ -54,7 +54,7 @@ class TestMsgVerifymessage(TrezorTest):
             '1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T',
             unhexlify('1ba77e01a9e17ba158b962cfef5f13dfed676ffc2b4bada24e58f784458b52b97421470d001d53d5880cf5e10e76f02be3e80bf21e18398cbd41e8c3b4af74c8c2'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is True
 
         # uncompressed pubkey - FAIL - wrong sig
@@ -64,7 +64,7 @@ class TestMsgVerifymessage(TrezorTest):
             '1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T',
             unhexlify('1ba77e01a9e17ba158b962cfef5f13dfed676ffc2b4bada24e58f784458b52b97421470d001d53d5880cf5e10e76f02be3e80bf21e18398cbd41e8c3b4af74c800'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is False
 
         # uncompressed pubkey - FAIL - wrong msg
@@ -74,7 +74,7 @@ class TestMsgVerifymessage(TrezorTest):
             '1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T',
             unhexlify('1ba77e01a9e17ba158b962cfef5f13dfed676ffc2b4bada24e58f784458b52b97421470d001d53d5880cf5e10e76f02be3e80bf21e18398cbd41e8c3b4af74c8c2'),
             'This is an example of a signed message!'
-            )
+        )
         assert res is False
 
         # compressed pubkey - OK
@@ -93,7 +93,7 @@ class TestMsgVerifymessage(TrezorTest):
             '1C7zdTfnkzmr13HfA2vNm5SJYRK6nEKyq8',
             unhexlify('1f44e3e461f7ca9f57c472ce1a28214df1de1dadefb6551a32d1907b80c74d5a1fbfd6daaba12dd8cb06699ce3f6941fbe0f3957b5802d13076181046e741eaa00'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is False
 
         # compressed pubkey - FAIL - wrong msg
@@ -112,7 +112,7 @@ class TestMsgVerifymessage(TrezorTest):
             '14LmW5k4ssUrtbAB4255zdqv3b4w1TuX9e',
             unhexlify('209e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is True
 
         # trezor pubkey - FAIL - wrong sig
@@ -122,7 +122,7 @@ class TestMsgVerifymessage(TrezorTest):
             '14LmW5k4ssUrtbAB4255zdqv3b4w1TuX9e',
             unhexlify('209e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be00'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is False
 
         # trezor pubkey - FAIL - wrong msg
@@ -132,7 +132,7 @@ class TestMsgVerifymessage(TrezorTest):
             '14LmW5k4ssUrtbAB4255zdqv3b4w1TuX9e',
             unhexlify('209e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message!'
-            )
+        )
         assert res is False
 
     def test_message_verify_bcash(self):
@@ -143,7 +143,7 @@ class TestMsgVerifymessage(TrezorTest):
             'bitcoincash:qqj22md58nm09vpwsw82fyletkxkq36zxyxh322pru',
             unhexlify('209e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is True
 
     def test_verify_bitcoind(self):
@@ -155,7 +155,7 @@ class TestMsgVerifymessage(TrezorTest):
             '1KzXE97kV7DrpxCViCN3HbGbiKhzzPM7TQ',
             unhexlify('1cc694f0f23901dfe3603789142f36a3fc582d0d5c0ec7215cf2ccd641e4e37228504f3d4dc3eea28bbdbf5da27c49d4635c097004d9f228750ccd836a8e1460c0'),
             u'\u017elu\u0165ou\u010dk\xfd k\u016f\u0148 \xfap\u011bl \u010f\xe1belsk\xe9 \xf3dy'
-            )
+        )
 
         assert res is True
 
diff --git a/trezorlib/tests/device_tests/test_msg_verifymessage_segwit.py b/trezorlib/tests/device_tests/test_msg_verifymessage_segwit.py
index 142a132d9..ae328e72e 100644
--- a/trezorlib/tests/device_tests/test_msg_verifymessage_segwit.py
+++ b/trezorlib/tests/device_tests/test_msg_verifymessage_segwit.py
@@ -41,7 +41,7 @@ class TestMsgVerifymessageSegwit(TrezorTest):
             '2N4VkePSzKH2sv5YBikLHGvzUYvfPxV6zS9',
             unhexlify('249e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message.'
-            )
+        )
         assert ret is True
 
     def test_message_verify(self):
@@ -54,7 +54,7 @@ class TestMsgVerifymessageSegwit(TrezorTest):
             '3CwYaeWxhpXXiHue3ciQez1DLaTEAXcKa1',
             unhexlify('249e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is True
 
         # trezor pubkey - FAIL - wrong sig
@@ -64,7 +64,7 @@ class TestMsgVerifymessageSegwit(TrezorTest):
             '3CwYaeWxhpXXiHue3ciQez1DLaTEAXcKa1',
             unhexlify('249e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be00'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is False
 
         # trezor pubkey - FAIL - wrong msg
@@ -74,7 +74,7 @@ class TestMsgVerifymessageSegwit(TrezorTest):
             '3CwYaeWxhpXXiHue3ciQez1DLaTEAXcKa1',
             unhexlify('249e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message!'
-            )
+        )
         assert res is False
 
     def test_verify_utf(self):
diff --git a/trezorlib/tests/device_tests/test_msg_verifymessage_segwit_native.py b/trezorlib/tests/device_tests/test_msg_verifymessage_segwit_native.py
index e091e0a5c..31d2c600a 100644
--- a/trezorlib/tests/device_tests/test_msg_verifymessage_segwit_native.py
+++ b/trezorlib/tests/device_tests/test_msg_verifymessage_segwit_native.py
@@ -41,7 +41,7 @@ class TestMsgVerifymessageSegwitNative(TrezorTest):
             'tb1qyjjkmdpu7metqt5r36jf872a34syws336p3n3p',
             unhexlify('289e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message.'
-            )
+        )
         assert ret is True
 
     def test_message_verify(self):
@@ -54,7 +54,7 @@ class TestMsgVerifymessageSegwitNative(TrezorTest):
             'bc1qyjjkmdpu7metqt5r36jf872a34syws33s82q2j',
             unhexlify('289e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is True
 
         # trezor pubkey - FAIL - wrong sig
@@ -64,7 +64,7 @@ class TestMsgVerifymessageSegwitNative(TrezorTest):
             'bc1qyjjkmdpu7metqt5r36jf872a34syws33s82q2j',
             unhexlify('289e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be00'),
             'This is an example of a signed message.'
-            )
+        )
         assert res is False
 
         # trezor pubkey - FAIL - wrong msg
@@ -74,7 +74,7 @@ class TestMsgVerifymessageSegwitNative(TrezorTest):
             'bc1qyjjkmdpu7metqt5r36jf872a34syws33s82q2j',
             unhexlify('289e23edf0e4e47ff1dec27f32cd78c50e74ef018ee8a6adf35ae17c7a9b0dd96f48b493fd7dbab03efb6f439c6383c9523b3bbc5f1a7d158a6af90ab154e9be80'),
             'This is an example of a signed message!'
-            )
+        )
         assert res is False
 
     def test_verify_utf(self):