diff --git a/pyrit/prompt_converter/translation_converter.py b/pyrit/prompt_converter/translation_converter.py
index 7b8c4c7c4..911f72ab5 100644
--- a/pyrit/prompt_converter/translation_converter.py
+++ b/pyrit/prompt_converter/translation_converter.py
@@ -46,7 +46,7 @@ def __init__(
         prompt_template: Optional[SeedPrompt] = None,
         max_retries: int = 3,
         max_wait_time_in_seconds: int = 60,
-    ):
+    ) -> None:
         """
         Initialize the converter with the target chat support, language, and optional prompt template.
 
diff --git a/pyrit/prompt_target/azure_blob_storage_target.py b/pyrit/prompt_target/azure_blob_storage_target.py
index 7303865c1..824c104f4 100644
--- a/pyrit/prompt_target/azure_blob_storage_target.py
+++ b/pyrit/prompt_target/azure_blob_storage_target.py
@@ -75,8 +75,8 @@ def __init__(
             env_var_name=self.AZURE_STORAGE_CONTAINER_ENVIRONMENT_VARIABLE, passed_value=container_url
         )
 
-        self._sas_token = sas_token
-        self._client_async: AsyncContainerClient = None
+        self._sas_token: Optional[str] = sas_token
+        self._client_async: Optional[AsyncContainerClient] = None
 
         super().__init__(endpoint=self._container_url, max_requests_per_minute=max_requests_per_minute)
 
diff --git a/tests/unit/scenarios/test_leakage_scenario.py b/tests/unit/scenarios/test_leakage_scenario.py
index 1641af0d2..b7b7d066d 100644
--- a/tests/unit/scenarios/test_leakage_scenario.py
+++ b/tests/unit/scenarios/test_leakage_scenario.py
@@ -536,9 +536,9 @@ def test_ensure_blank_image_exists_creates_image(self, mock_objective_scorer, sa
         # Verify it's a valid image with correct dimensions
         from PIL import Image
 
-        img = Image.open(test_image_path)
-        assert img.size == (800, 600)
-        assert img.mode == "RGB"
+        with Image.open(test_image_path) as img:
+            assert img.size == (800, 600)
+            assert img.mode == "RGB"
 
     def test_ensure_blank_image_exists_does_not_overwrite(self, mock_objective_scorer, sample_objectives, tmp_path):
         """Test that _ensure_blank_image_exists doesn't overwrite existing image."""
@@ -564,8 +564,8 @@ def test_ensure_blank_image_exists_does_not_overwrite(self, mock_objective_score
         assert Path(test_image_path).stat().st_mtime == original_mtime
 
         # Verify it's still the original image
-        img = Image.open(test_image_path)
-        assert img.size == (100, 100)  # Original size, not 800x600
+        with Image.open(test_image_path) as img:
+            assert img.size == (100, 100)  # Original size, not 800x600
 
     def test_ensure_blank_image_exists_creates_parent_directories(
         self, mock_objective_scorer, sample_objectives, tmp_path
diff --git a/tests/unit/target/test_tts_target.py b/tests/unit/target/test_tts_target.py
index 70b53dd6c..42ccc8a1b 100644
--- a/tests/unit/target/test_tts_target.py
+++ b/tests/unit/target/test_tts_target.py
@@ -4,6 +4,7 @@
 import os
 import uuid
 from collections.abc import MutableSequence
+from pathlib import Path
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
@@ -121,7 +122,7 @@ async def test_tts_send_prompt_file_save_async(
         assert file_path
         assert file_path.endswith(f".{response_format}")
         assert os.path.exists(file_path)
-        data = open(file_path, "rb").read()  # noqa: SIM115
+        data = Path(file_path).read_bytes()
         assert data == b"audio data"
         os.remove(file_path)
 
diff --git a/tests/unit/target/test_websocket_copilot_target.py b/tests/unit/target/test_websocket_copilot_target.py
index 21d3e610b..e44f4e73d 100644
--- a/tests/unit/target/test_websocket_copilot_target.py
+++ b/tests/unit/target/test_websocket_copilot_target.py
@@ -16,7 +16,7 @@
 @pytest.fixture
 def mock_authenticator():
     token_payload = {"tid": "test_tenant_id", "oid": "test_object_id", "exp": 9999999999}
-    mock_token = jwt.encode(token_payload, "secret", algorithm="HS256")
+    mock_token = jwt.encode(token_payload, "a]T3!s$ecReT#kEy_4_tEst!ng@2024+", algorithm="HS256")
     if isinstance(mock_token, bytes):
         mock_token = mock_token.decode("utf-8")
     authenticator = MagicMock(spec=CopilotAuthenticator)
@@ -267,7 +267,7 @@ async def test_build_websocket_url_with_missing_ids(self, mock_authenticator, mo
             token_payload = {"tid": "test_tenant_id", "oid": "test_object_id", "exp": 9999999999}
             del token_payload[missing_id]
 
-            mock_token = jwt.encode(token_payload, "secret", algorithm="HS256")
+            mock_token = jwt.encode(token_payload, "a]T3!s$ecReT#kEy_4_tEst!ng@2024+", algorithm="HS256")
             if isinstance(mock_token, bytes):
                 mock_token = mock_token.decode("utf-8")
             mock_authenticator.get_token = AsyncMock(return_value=mock_token)
@@ -848,7 +848,7 @@ async def test_send_prompt_async_successful(self, mock_authenticator, make_messa
 
         assert len(responses) == 1
         assert responses[0].message_pieces[0].converted_value == "Response from Copilot"
-        assert responses[0].message_pieces[0].role == "assistant"
+        assert responses[0].message_pieces[0].api_role == "assistant"
 
     @pytest.mark.asyncio
     async def test_send_prompt_async_with_exceptions(self, mock_authenticator, make_message_piece, mock_memory):
@@ -884,7 +884,7 @@ async def test_send_prompt_async_with_image(self, mock_authenticator, make_messa
 
             assert len(responses) == 1
             assert responses[0].message_pieces[0].converted_value == "Image description response"
-            assert responses[0].message_pieces[0].role == "assistant"
+            assert responses[0].message_pieces[0].api_role == "assistant"
 
     @pytest.mark.asyncio
     async def test_send_prompt_async_with_mixed_content(self, mock_authenticator, make_message_piece, mock_memory):