diff --git a/gunicorn/dirty/arbiter.py b/gunicorn/dirty/arbiter.py
index b867ed18..bfeaab82 100644
--- a/gunicorn/dirty/arbiter.py
+++ b/gunicorn/dirty/arbiter.py
@@ -16,7 +16,6 @@ import signal
 import sys
 import tempfile
 import time
-import traceback
 
 from gunicorn import util
 
@@ -357,7 +356,7 @@ class DirtyArbiter:
             sys.exit(0)
         except SystemExit:
             raise
-        except Exception as e:
+        except Exception:
             self.log.exception("Exception in dirty worker process")
             if not worker.booted:
                 sys.exit(self.WORKER_BOOT_ERROR)
diff --git a/gunicorn/dirty/client.py b/gunicorn/dirty/client.py
index bed3a3ce..39eac4b1 100644
--- a/gunicorn/dirty/client.py
+++ b/gunicorn/dirty/client.py
@@ -125,7 +125,7 @@ class DirtyClient:
         except socket.timeout:
             self._close_socket()
             raise DirtyTimeoutError(
-                f"Timeout waiting for dirty app response",
+                "Timeout waiting for dirty app response",
                 timeout=self.timeout
             )
         except Exception as e:
@@ -238,7 +238,7 @@ class DirtyClient:
         except asyncio.TimeoutError:
             await self._close_async()
             raise DirtyTimeoutError(
-                f"Timeout waiting for dirty app response",
+                "Timeout waiting for dirty app response",
                 timeout=self.timeout
             )
         except Exception as e:
diff --git a/gunicorn/dirty/worker.py b/gunicorn/dirty/worker.py
index ab607bc6..b7797fb8 100644
--- a/gunicorn/dirty/worker.py
+++ b/gunicorn/dirty/worker.py
@@ -12,7 +12,6 @@ from the DirtyArbiter.
 import asyncio
 import os
 import signal
-import sys
 import traceback
 import uuid
 
@@ -214,7 +213,6 @@ class DirtyWorker:
 
         Each connection can send multiple requests.
         """
-        addr = writer.get_extra_info('peername')
         self.log.debug("New connection from arbiter")
 
         try:
diff --git a/tests/test_dirty_client.py b/tests/test_dirty_client.py
index 5876be32..89e58805 100644
--- a/tests/test_dirty_client.py
+++ b/tests/test_dirty_client.py
@@ -4,7 +4,6 @@
 
 """Tests for dirty client module."""
 
-import asyncio
 import os
 import socket
 import tempfile
@@ -17,7 +16,6 @@ from gunicorn.dirty.client import (
     get_dirty_socket_path,
     set_dirty_socket_path,
     close_dirty_client,
-    _thread_local,
 )
 from gunicorn.dirty.errors import DirtyConnectionError, DirtyError
 from gunicorn.dirty.protocol import DirtyProtocol, make_response
diff --git a/tests/test_dirty_integration.py b/tests/test_dirty_integration.py
index 6a8b263f..6e9d0bd3 100644
--- a/tests/test_dirty_integration.py
+++ b/tests/test_dirty_integration.py
@@ -155,7 +155,6 @@ class TestDirtyExecutionTimeout:
         import tempfile
         from gunicorn.dirty.arbiter import DirtyArbiter
         from gunicorn.dirty.protocol import DirtyProtocol, make_request
-        from gunicorn.dirty.errors import DirtyTimeoutError
 
         class MockLog:
             def debug(self, *a, **kw): pass
diff --git a/tests/test_dirty_protocol.py b/tests/test_dirty_protocol.py
index e2ac3f85..7ea0da14 100644
--- a/tests/test_dirty_protocol.py
+++ b/tests/test_dirty_protocol.py
@@ -5,6 +5,7 @@
 """Tests for dirty arbiter protocol module."""
 
 import asyncio
+import os
 import socket
 import struct
 import pytest
@@ -183,7 +184,7 @@ class TestDirtyProtocolAsync:
         read_fd, write_fd = os.pipe()
         try:
             reader = asyncio.StreamReader()
-            protocol = asyncio.StreamReaderProtocol(reader)
+            _ = asyncio.StreamReaderProtocol(reader)
 
             # Write the message to the pipe
             encoded = DirtyProtocol.encode(message)
@@ -369,7 +370,3 @@ class TestDirtyErrors:
         assert error.action == "run"
         assert error.traceback == "Traceback..."
         assert "myapp:App" in str(error)
-
-
-# Add import needed for async tests
-import os
diff --git a/tests/test_dirty_worker.py b/tests/test_dirty_worker.py
index 68d92a0c..1e45629f 100644
--- a/tests/test_dirty_worker.py
+++ b/tests/test_dirty_worker.py
@@ -662,8 +662,6 @@ class TestDirtyWorkerRunAsync:
             reader.feed_data(encoded_request)
             reader.feed_eof()
 
-            responses = []
-
             class MockWriter:
                 def __init__(self):
                     self.closed = False