diff --git a/tests/unit/agents/test_market_analyst_extended.py b/tests/unit/agents/test_market_analyst_extended.py
index 4d66bc42..33cbd1a7 100644
--- a/tests/unit/agents/test_market_analyst_extended.py
+++ b/tests/unit/agents/test_market_analyst_extended.py
@@ -1,6 +1,6 @@
 """Extended unit tests for market analyst to improve coverage."""
 
-from unittest.mock import Mock, MagicMock, patch
+from unittest.mock import Mock
 import pytest
 
 
diff --git a/tests/unit/dataflows/test_utils.py b/tests/unit/dataflows/test_utils.py
index 4d18fac8..5e41656d 100644
--- a/tests/unit/dataflows/test_utils.py
+++ b/tests/unit/dataflows/test_utils.py
@@ -1,8 +1,5 @@
 """Unit tests for dataflows utils module."""
 
-from unittest.mock import Mock, patch
-import pytest
-from datetime import datetime
 
 
 class TestDataflowsUtils:
diff --git a/tests/unit/graph/test_propagation.py b/tests/unit/graph/test_propagation.py
index 5cfcd43d..95bd5a2b 100644
--- a/tests/unit/graph/test_propagation.py
+++ b/tests/unit/graph/test_propagation.py
@@ -1,6 +1,6 @@
 """Unit tests for propagation module."""
 
-from unittest.mock import Mock, patch
+from unittest.mock import Mock
 import pytest
 
 
diff --git a/tests/unit/graph/test_reflection.py b/tests/unit/graph/test_reflection.py
index 599b77f9..a275431f 100644
--- a/tests/unit/graph/test_reflection.py
+++ b/tests/unit/graph/test_reflection.py
@@ -1,6 +1,6 @@
 """Unit tests for reflection module."""
 
-from unittest.mock import Mock, patch
+from unittest.mock import Mock
 import pytest
 
 
diff --git a/tests/unit/graph/test_signal_processing.py b/tests/unit/graph/test_signal_processing.py
index 8254c043..a959f283 100644
--- a/tests/unit/graph/test_signal_processing.py
+++ b/tests/unit/graph/test_signal_processing.py
@@ -1,7 +1,6 @@
 """Unit tests for signal processing module."""
 
 from unittest.mock import Mock, patch
-import pytest
 
 
 class TestSignalProcessor:
@@ -9,7 +8,7 @@ class TestSignalProcessor:
 
     def test_signal_processor_initialization(self):
         """Test SignalProcessor initialization."""
-        mock_llm = Mock()
+        # mock_llm would be used here but import is mocked
 
         # Import with mocked dependencies to avoid pandas import
         with patch(