diff --git a/core_os/state.py b/core_os/state.py
index 323d40a..99d4f38 100644
--- a/core_os/state.py
+++ b/core_os/state.py
@@ -1,7 +1,5 @@
 """Core OS state management"""
 from typing import Optional
-import copy
-
 from core_os.models import OSState, Window, UserSession, WindowState
 
 
diff --git a/core_os/tests/test_models.py b/core_os/tests/test_models.py
index 018f424..47591d4 100644
--- a/core_os/tests/test_models.py
+++ b/core_os/tests/test_models.py
@@ -1,5 +1,4 @@
 """Tests for core OS models"""
-import pytest
 from core_os.models import UserSession, Window, OSState, WindowState
 
 
diff --git a/core_os/tests/test_state.py b/core_os/tests/test_state.py
index 27c5c2e..af83d4d 100644
--- a/core_os/tests/test_state.py
+++ b/core_os/tests/test_state.py
@@ -1,5 +1,4 @@
 """Tests for OS state management"""
-import pytest
 from core_os.state import (
     get_initial_state,
     get_current_state,