diff --git a/lib/cli/tests/test_plus_api.py b/lib/cli/tests/test_plus_api.py
index 1ee4eb7af..e13082dab 100644
--- a/lib/cli/tests/test_plus_api.py
+++ b/lib/cli/tests/test_plus_api.py
@@ -17,7 +17,7 @@ class TestPlusAPI(unittest.TestCase):
         self.assertEqual(self.api.api_key, self.api_key)
         self.assertEqual(self.api.headers["Authorization"], f"Bearer {self.api_key}")
         self.assertEqual(self.api.headers["Content-Type"], "application/json")
-        self.assertTrue("CrewAI-CLI/" in self.api.headers["User-Agent"])
+        self.assertIn("CrewAI-CLI/", self.api.headers["User-Agent"])
         self.assertTrue(self.api.headers["X-Crewai-Version"])
 
     @patch("crewai_cli.plus_api.PlusAPI._make_request")
diff --git a/lib/cli/tests/test_token_manager.py b/lib/cli/tests/test_token_manager.py
index 1cc14abdf..84ca65889 100644
--- a/lib/cli/tests/test_token_manager.py
+++ b/lib/cli/tests/test_token_manager.py
@@ -1,7 +1,6 @@
 """Tests for TokenManager with atomic file operations."""
 
 import json
-import os
 import tempfile
 import unittest
 from datetime import datetime, timedelta
diff --git a/lib/crewai/src/crewai/auth/providers/base_provider.py b/lib/crewai/src/crewai/auth/providers/base_provider.py
index d69d8d673..926e3ca1d 100644
--- a/lib/crewai/src/crewai/auth/providers/base_provider.py
+++ b/lib/crewai/src/crewai/auth/providers/base_provider.py
@@ -12,22 +12,28 @@ class BaseProvider(ABC):
         self.settings = settings
 
     @abstractmethod
-    def get_authorize_url(self) -> str: ...
+    def get_authorize_url(self) -> str:
+        """Return the authorization endpoint URL."""
 
     @abstractmethod
-    def get_token_url(self) -> str: ...
+    def get_token_url(self) -> str:
+        """Return the token endpoint URL."""
 
     @abstractmethod
-    def get_jwks_url(self) -> str: ...
+    def get_jwks_url(self) -> str:
+        """Return the JWKS endpoint URL."""
 
     @abstractmethod
-    def get_issuer(self) -> str: ...
+    def get_issuer(self) -> str:
+        """Return the OAuth issuer identifier."""
 
     @abstractmethod
-    def get_audience(self) -> str: ...
+    def get_audience(self) -> str:
+        """Return the OAuth audience identifier."""
 
     @abstractmethod
-    def get_client_id(self) -> str: ...
+    def get_client_id(self) -> str:
+        """Return the OAuth client identifier."""
 
     def get_required_fields(self) -> list[str]:
         """Returns which provider-specific fields inside the "extra" dict will be required."""
diff --git a/lib/crewai/src/crewai/auth/token_manager.py b/lib/crewai/src/crewai/auth/token_manager.py
index 9f1807d33..5ab5eb801 100644
--- a/lib/crewai/src/crewai/auth/token_manager.py
+++ b/lib/crewai/src/crewai/auth/token_manager.py
@@ -182,7 +182,4 @@ class TokenManager:
         """
         storage_path = self._get_secure_storage_path()
         file_path = storage_path / filename
-        try:
-            file_path.unlink()
-        except FileNotFoundError:
-            pass
+        file_path.unlink(missing_ok=True)
diff --git a/lib/crewai/tests/llms/openai/test_openai.py b/lib/crewai/tests/llms/openai/test_openai.py
index b68d9bd1c..746729edb 100644
--- a/lib/crewai/tests/llms/openai/test_openai.py
+++ b/lib/crewai/tests/llms/openai/test_openai.py
@@ -11,7 +11,6 @@ from crewai.llms.providers.openai.completion import OpenAICompletion, ResponsesA
 from crewai.crew import Crew
 from crewai.agent import Agent
 from crewai.task import Task
-from crewai.constants import DEFAULT_LLM_MODEL
 
 def test_openai_completion_is_used_when_openai_provider():
     """