diff --git a/tests/test_agent_capabilities.py b/tests/test_agent_capabilities.py
index 487fb1f..df52a5c 100644
--- a/tests/test_agent_capabilities.py
+++ b/tests/test_agent_capabilities.py
@@ -7,6 +7,5 @@ sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
 import ai_client
 
-def test_agent_capabilities_listing():
-# Verify that the agent exposes its available tools correctly
+def test_agent_capabilities_listing() -> None:
  pass
diff --git a/tests/test_dag_engine.py b/tests/test_dag_engine.py
index 07b1765..4ba1b74 100644
--- a/tests/test_dag_engine.py
+++ b/tests/test_dag_engine.py
@@ -40,8 +40,7 @@ def test_has_cycle_indirect_cycle() -> None:
  dag = TrackDAG([t1, t2, t3])
  assert dag.has_cycle()
 
-def test_has_cycle_complex_no_cycle():
-# T1 -> T2, T1 -> T3, T2 -> T4, T3 -> T4
+def test_has_cycle_complex_no_cycle() -> None:
  t1 = Ticket(id="T1", description="T1", status="todo", assigned_to="worker", depends_on=["T2", "T3"])
  t2 = Ticket(id="T2", description="T2", status="todo", assigned_to="worker", depends_on=["T4"])
  t3 = Ticket(id="T3", description="T3", status="todo", assigned_to="worker", depends_on=["T4"])
diff --git a/tests/test_execution_engine.py b/tests/test_execution_engine.py
index d3356f5..33a6e02 100644
--- a/tests/test_execution_engine.py
+++ b/tests/test_execution_engine.py
@@ -2,8 +2,7 @@ import pytest
 from models import Ticket
 from dag_engine import TrackDAG, ExecutionEngine
 
-def test_execution_engine_basic_flow():
-# Setup tickets with dependencies
+def test_execution_engine_basic_flow() -> None:
  t1 = Ticket(id="T1", description="Task 1", status="todo", assigned_to="worker")
  t2 = Ticket(id="T2", description="Task 2", status="todo", assigned_to="worker", depends_on=["T1"])
  t3 = Ticket(id="T3", description="Task 3", status="todo", assigned_to="worker", depends_on=["T1"])
diff --git a/tests/test_headless_verification.py b/tests/test_headless_verification.py
index 033a43f..8000045 100644
--- a/tests/test_headless_verification.py
+++ b/tests/test_headless_verification.py
@@ -1,3 +1,4 @@
+from typing import Any
 import pytest
 from unittest.mock import MagicMock, patch, call
 from models import Ticket, Track, WorkerContext
@@ -33,7 +34,7 @@ async def test_headless_verification_full_run() -> None:
   assert mock_reset.call_count == 2
 
 @pytest.mark.asyncio
-async def test_headless_verification_error_and_qa_interceptor():
+async def test_headless_verification_error_and_qa_interceptor() -> None:
  """
     5. Simulate a shell error and verify that the Tier 4 QA interceptor is triggered 
        and its summary is injected into the worker's history for the next retry.
@@ -54,7 +55,7 @@ async def test_headless_verification_error_and_qa_interceptor():
  # Ensure _gemini_client is restored by the mock ensure function
   import ai_client
 
-  def restore_client():
+  def restore_client() -> None:
    ai_client._gemini_client = mock_genai_client
   mock_ensure.side_effect = restore_client
   ai_client._gemini_client = mock_genai_client
@@ -86,7 +87,7 @@ async def test_headless_verification_error_and_qa_interceptor():
   mock_chat.send_message.side_effect = [mock_resp1, mock_resp2]
   # Mock run_powershell behavior: it should call the qa_callback on error
 
-  def run_side_effect(script, base_dir, qa_callback):
+  def run_side_effect(script: Any, base_dir: Any, qa_callback: Any) -> Any:
    if qa_callback:
     analysis = qa_callback("Error: file not found")
     return f"""STDERR: Error: file not found
@@ -117,3 +118,4 @@ QA ANALYSIS:
    if "QA ANALYSIS:" in part_str and "FIX: Check if path exists." in part_str:
     found_qa = True
   assert found_qa, "QA Analysis was not injected into the next round"
+
diff --git a/tests/test_mcp_perf_tool.py b/tests/test_mcp_perf_tool.py
index e168766..250842f 100644
--- a/tests/test_mcp_perf_tool.py
+++ b/tests/test_mcp_perf_tool.py
@@ -8,8 +8,7 @@ sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
 import mcp_client
 
-def test_mcp_perf_tool_retrieval():
-# Test that the MCP tool can call performance_monitor metrics
+def test_mcp_perf_tool_retrieval() -> None:
  mock_metrics = {"fps": 60, "last_frame_time_ms": 16.6}
  # Simulate tool call by patching the callback
  with patch('mcp_client.perf_monitor_callback', return_value=mock_metrics):
diff --git a/tests/test_sim_ai_settings.py b/tests/test_sim_ai_settings.py
index a46286d..a899b99 100644
--- a/tests/test_sim_ai_settings.py
+++ b/tests/test_sim_ai_settings.py
@@ -8,7 +8,7 @@ sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
 from simulation.sim_ai_settings import AISettingsSimulation
 
-def test_ai_settings_simulation_run():
+def test_ai_settings_simulation_run() -> None:
  mock_client = MagicMock()
  mock_client.wait_for_server.return_value = True
  mock_client.get_value.side_effect = lambda key: {
diff --git a/tests/test_sim_execution.py b/tests/test_sim_execution.py
index dbbc16d..875a033 100644
--- a/tests/test_sim_execution.py
+++ b/tests/test_sim_execution.py
@@ -8,7 +8,7 @@ sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
 from simulation.sim_execution import ExecutionSimulation
 
-def test_execution_simulation_run():
+def test_execution_simulation_run() -> None:
  mock_client = MagicMock()
  mock_client.wait_for_server.return_value = True
  # Mock show_confirm_modal state