diff --git a/src/crewai/tasks/chunk_based_task.py b/src/crewai/tasks/chunk_based_task.py
index 379e78ddf..180388893 100644
--- a/src/crewai/tasks/chunk_based_task.py
+++ b/src/crewai/tasks/chunk_based_task.py
@@ -1,6 +1,6 @@
 import datetime
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Union
+from typing import Any, List, Optional, Union
 from pydantic import Field, field_validator
 
 from crewai.task import Task
@@ -61,7 +61,7 @@ class ChunkBasedTask(Task):
         """Create a task description for processing a single chunk."""
         chunk_context = f"Processing chunk {chunk_index + 1} of {total_chunks}"
         if self.chunk_results:
-            chunk_context += f"\n\nPrevious chunk insights from memory will be available."
+            chunk_context += "\n\nPrevious chunk insights from memory will be available."
         
         return f"{chunk_context}\n\n{self.description}\n\nChunk content:\n{chunk}"
 
diff --git a/tests/test_chunk_based_task.py b/tests/test_chunk_based_task.py
index 9d7696a0c..a55a0a4a4 100644
--- a/tests/test_chunk_based_task.py
+++ b/tests/test_chunk_based_task.py
@@ -4,7 +4,6 @@ from pathlib import Path
 from unittest.mock import Mock, patch
 
 from crewai.tasks.chunk_based_task import ChunkBasedTask
-from crewai.agent import Agent
 from crewai.tasks.task_output import TaskOutput
 
 
@@ -110,7 +109,7 @@ class TestChunkBasedTask:
             mock_agent.role = "test_agent"
             mock_agent.crew = None
             
-            result = task._execute_core(mock_agent, None, None)
+            task._execute_core(mock_agent, None, None)
             
             assert len(task.chunk_results) > 1
             assert mock_execute.call_count > len(task.chunk_results)
diff --git a/tests/test_chunk_based_task_integration.py b/tests/test_chunk_based_task_integration.py
index 03e700e80..25256ab4b 100644
--- a/tests/test_chunk_based_task_integration.py
+++ b/tests/test_chunk_based_task_integration.py
@@ -1,4 +1,3 @@
-import pytest
 import tempfile
 from pathlib import Path
 
@@ -42,7 +41,7 @@ class TestChunkBasedTaskIntegration:
                 agent=agent
             )
             
-            crew = Crew(
+            Crew(
                 agents=[agent],
                 tasks=[task],
                 memory=True