diff --git a/tests/speculos/conftest.py b/tests/speculos/conftest.py
index cc0175f..b10f7a6 100644
--- a/tests/speculos/conftest.py
+++ b/tests/speculos/conftest.py
@@ -1,5 +1,4 @@
 from pathlib import Path
-
 import pytest
 
 from speculos.client import SpeculosClient
diff --git a/tests/speculos/ethereum_client/ethereum_cmd_builder.py b/tests/speculos/ethereum_client/ethereum_cmd_builder.py
index 594e054..e0e8f0a 100644
--- a/tests/speculos/ethereum_client/ethereum_cmd_builder.py
+++ b/tests/speculos/ethereum_client/ethereum_cmd_builder.py
@@ -3,7 +3,6 @@ import logging
 import struct
 from typing import List, Tuple, Union, Iterator, cast
 
-
 from ethereum_client.transaction import PersonalTransaction, Transaction
 from ethereum_client.plugin import Plugin
 from ethereum_client.utils import bip32_path_from_string
diff --git a/tests/speculos/ethereum_client/plugin.py b/tests/speculos/ethereum_client/plugin.py
index 2c4f4e2..d6bdc58 100644
--- a/tests/speculos/ethereum_client/plugin.py
+++ b/tests/speculos/ethereum_client/plugin.py
@@ -1,7 +1,6 @@
 from typing import Union
 
-from ethereum_client.utils import (read, read_uint, read_varint,
-                                      write_varint, UINT64_MAX)
+from ethereum_client.utils import write_varint
 
 class Plugin:
     """Plugin class
diff --git a/tests/speculos/ethereum_client/transaction.py b/tests/speculos/ethereum_client/transaction.py
index f20102f..08ff529 100644
--- a/tests/speculos/ethereum_client/transaction.py
+++ b/tests/speculos/ethereum_client/transaction.py
@@ -1,8 +1,6 @@
-from io import BytesIO
 from typing import Union
 
-from ethereum_client.utils import (read, read_uint, read_varint,
-                                      write_varint, UINT64_MAX)
+from ethereum_client.utils import write_varint, UINT64_MAX
 
 
 class TransactionError(Exception):
diff --git a/tests/speculos/ethereum_client/utils.py b/tests/speculos/ethereum_client/utils.py
index e318b7f..78e690c 100644
--- a/tests/speculos/ethereum_client/utils.py
+++ b/tests/speculos/ethereum_client/utils.py
@@ -1,11 +1,9 @@
 from io import BytesIO
 from typing import List, Optional, Literal, Tuple
+import PIL.Image as Image
 
 import speculos.client
 
-import PIL.Image as Image
-import io
-
 UINT64_MAX: int = 18446744073709551615
 UINT32_MAX: int = 4294967295
 UINT16_MAX: int = 65535
@@ -26,13 +24,13 @@ def apdu_as_string(apdu: str) -> bytes:
 
 def save_screenshot(cmd, path: str):
     screenshot = cmd.client.get_screenshot()
-    img = Image.open(io.BytesIO(screenshot))
+    img = Image.open(BytesIO(screenshot))
     img.save(path)
 
 
 def compare_screenshot(cmd, path: str):
     screenshot = cmd.client.get_screenshot()
-    assert speculos.client.screenshot_equal(path, io.BytesIO(screenshot))
+    assert speculos.client.screenshot_equal(path, BytesIO(screenshot))
 
 
 def parse_sign_response(response : bytes) -> Tuple[bytes, bytes, bytes]:
diff --git a/tests/speculos/test_eip1559.py b/tests/speculos/test_eip1559.py
index 3898c8f..dd3d8d9 100644
--- a/tests/speculos/test_eip1559.py
+++ b/tests/speculos/test_eip1559.py
@@ -1,7 +1,6 @@
 from time import sleep
-from ethereum_client.utils import UINT64_MAX, apdu_as_string, compare_screenshot, save_screenshot, PATH_IMG, parse_sign_response
-from ethereum_client.plugin import Plugin
-import ethereum_client
+
+from ethereum_client.utils import apdu_as_string, compare_screenshot, save_screenshot, PATH_IMG, parse_sign_response
 
 def test_sign_eip_1559(cmd):
     result: list = []
diff --git a/tests/speculos/test_eip191.py b/tests/speculos/test_eip191.py
index 579ba7e..822d14d 100644
--- a/tests/speculos/test_eip191.py
+++ b/tests/speculos/test_eip191.py
@@ -1,7 +1,7 @@
 from time import sleep
-import ethereum_client
 
-from ethereum_client.utils import UINT64_MAX, apdu_as_string, compare_screenshot, compare_screenshot, parse_sign_response, save_screenshot, PATH_IMG
+import ethereum_client
+from ethereum_client.utils import apdu_as_string, compare_screenshot, compare_screenshot, parse_sign_response, save_screenshot, PATH_IMG
 from ethereum_client.transaction import PersonalTransaction
 
 def test_personal_sign_metamask(cmd):
diff --git a/tests/speculos/test_erc1155.py b/tests/speculos/test_erc1155.py
index 5e13def..44463a5 100644
--- a/tests/speculos/test_erc1155.py
+++ b/tests/speculos/test_erc1155.py
@@ -1,7 +1,8 @@
 from time import sleep
-from ethereum_client.utils import UINT64_MAX, apdu_as_string, compare_screenshot, save_screenshot, PATH_IMG, parse_sign_response
-from ethereum_client.plugin import Plugin
+
 import ethereum_client
+from ethereum_client.utils import apdu_as_string, compare_screenshot, save_screenshot, PATH_IMG, parse_sign_response
+from ethereum_client.plugin import Plugin
 
 SIGN_FIRST = apdu_as_string("e004000096058000002c8000003c800000000000000000000000f901090b8520b673dd0082bcb394495f947276749ce646f68ac8c248420045cb7b5e80b8e4f242432a0000000000000000000000006cbcd73cd8e8a42844662f0a0e76d7f79afd933d000000000000000000000000c2907efcce4011c491bbeda8a0fa63ba7aab596cabf06640f8ca8fc5e0ed471b10befcdf65a33e4300000000")
 SIGN_MORE = apdu_as_string("e00480008b00006a0000000064000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000043078303000000000000000000000000000000000000000000000000000000000018080")
diff --git a/tests/speculos/test_erc721.py b/tests/speculos/test_erc721.py
index 9dd9add..f2ac564 100644
--- a/tests/speculos/test_erc721.py
+++ b/tests/speculos/test_erc721.py
@@ -1,7 +1,8 @@
 from time import sleep
-from ethereum_client.utils import UINT64_MAX, apdu_as_string, compare_screenshot, save_screenshot, PATH_IMG, parse_sign_response
-from ethereum_client.plugin import Plugin
+
 import ethereum_client
+from ethereum_client.utils import apdu_as_string, compare_screenshot, save_screenshot, PATH_IMG, parse_sign_response
+from ethereum_client.plugin import Plugin
 
 SIGN_FIRST = apdu_as_string("e004000096058000002c8000003c800000000000000000000000f88a0a852c3ce1ec008301f5679460f80121c31a0d46b5279700f9df786054aa5ee580b86442842e0e0000000000000000000000006cbcd73cd8e8a42844662f0a0e76d7f79afd933d000000000000000000000000c2907efcce4011c491bbeda8a0fa63ba7aab596c000000000000000000000000000000000000000000000000")
 SIGN_MORE = apdu_as_string("e00480000b0000000000112999018080")
diff --git a/tests/speculos/test_pubkey_cmd.py b/tests/speculos/test_pubkey_cmd.py
index d059ceb..8e6bfca 100644
--- a/tests/speculos/test_pubkey_cmd.py
+++ b/tests/speculos/test_pubkey_cmd.py
@@ -1,12 +1,7 @@
-
-from cgitb import reset
-from pickle import TRUE
-from typing import Tuple
-
 from time import sleep
 
 import ethereum_client
-from ethereum_client.utils import UINT64_MAX, compare_screenshot, save_screenshot, PATH_IMG
+from ethereum_client.utils import compare_screenshot, save_screenshot, PATH_IMG
 
 
 def test_get_public_key(cmd):
diff --git a/tests/speculos/test_sign_cmd.py b/tests/speculos/test_sign_cmd.py
index 0590c2b..2076459 100644
--- a/tests/speculos/test_sign_cmd.py
+++ b/tests/speculos/test_sign_cmd.py
@@ -1,8 +1,7 @@
 from time import sleep
+
 import ethereum_client
-
-
-from ethereum_client.utils import UINT64_MAX, compare_screenshot, compare_screenshot, save_screenshot, PATH_IMG
+from ethereum_client.utils import compare_screenshot, compare_screenshot, save_screenshot, PATH_IMG
 from ethereum_client.transaction import Transaction
 
 
diff --git a/tests/speculos/test_version_cmd.py b/tests/speculos/test_version_cmd.py
deleted file mode 100644
index 1ad0133..0000000
--- a/tests/speculos/test_version_cmd.py
+++ /dev/null
@@ -1,10 +0,0 @@
-#from warnings import catch_warnings
-#
-#import boilerplate_client
-#
-#
-#def test_version(cmd):
-#    try:
-#        cmd.get_version()
-#    except boilerplate_client.exception.errors.InsNotSupportedError as error:
-#        assert error.args[0] == '0x6d00'
\ No newline at end of file