diff --git a/src/pook/exceptions.py b/src/pook/exceptions.py
index 25334d8..931a3a4 100644
--- a/src/pook/exceptions.py
+++ b/src/pook/exceptions.py
@@ -15,7 +15,11 @@ class PookNetworkFilterError(Exception):
 
 class PookExpiredMock(Exception):
     def __init__(self, *args, **kwargs):
-        warnings.warn("PookExpiredMock is deprecated and will be removed in a future version of Pook", DeprecationWarning, stacklevel=2)
+        warnings.warn(
+            "PookExpiredMock is deprecated and will be removed in a future version of Pook",
+            DeprecationWarning,
+            stacklevel=2,
+        )
         super().__init__(*args, **kwargs)
 
 
diff --git a/src/pook/mock.py b/src/pook/mock.py
index 3b38cae..95700f7 100644
--- a/src/pook/mock.py
+++ b/src/pook/mock.py
@@ -768,9 +768,7 @@ def match(self, request):
             return False, errors
 
         if self.isdone():
-            return False, [
-                f"Mock matches request but is expired.\n{repr(self)}"
-            ]
+            return False, [f"Mock matches request but is expired.\n{repr(self)}"]
 
         # Register matched request for further inspecion and reference
         self._calls.append(request)
diff --git a/src/pook/regex.py b/src/pook/regex.py
index ec22344..a76b6c1 100644
--- a/src/pook/regex.py
+++ b/src/pook/regex.py
@@ -1,5 +1,4 @@
 import re
-import sys
 
 Pattern = re.Pattern
 
diff --git a/tests/integration/examples_test.py b/tests/integration/examples_test.py
index f2f9206..e0d8e6f 100644
--- a/tests/integration/examples_test.py
+++ b/tests/integration/examples_test.py
@@ -1,4 +1,3 @@
-import sys
 import subprocess
 import pytest
 from pathlib import Path