diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ec122331..575b5dc0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,6 +36,10 @@ jobs:
               run: |
                   ruff format --check .
 
+            - name: Lint with ruff
+              run: |
+                  ruff check .
+
             - name: Check types with mypy
               run: |
                   mypy --no-site-packages --config-file mypy.ini  . | mypy-baseline filter
diff --git a/posthog/__init__.py b/posthog/__init__.py
index 170a3180..98286dd7 100644
--- a/posthog/__init__.py
+++ b/posthog/__init__.py
@@ -18,8 +18,15 @@
     DEFAULT_CODE_VARIABLES_IGNORE_PATTERNS,
     DEFAULT_CODE_VARIABLES_MASK_PATTERNS,
 )
-from posthog.feature_flags import InconclusiveMatchError, RequiresServerEvaluation
-from posthog.types import FeatureFlag, FlagsAndPayloads, FeatureFlagResult
+from posthog.feature_flags import (
+    InconclusiveMatchError as InconclusiveMatchError,
+    RequiresServerEvaluation as RequiresServerEvaluation,
+)
+from posthog.types import (
+    FeatureFlag,
+    FlagsAndPayloads,
+    FeatureFlagResult as FeatureFlagResult,
+)
 from posthog.version import VERSION
 
 __version__ = VERSION
diff --git a/posthog/exception_utils.py b/posthog/exception_utils.py
index f4142827..ad6cd33d 100644
--- a/posthog/exception_utils.py
+++ b/posthog/exception_utils.py
@@ -929,7 +929,7 @@ def _compile_patterns(patterns):
     for pattern in patterns:
         try:
             compiled.append(re.compile(pattern))
-        except:
+        except Exception:
             pass
     return compiled
 
diff --git a/posthog/test/ai/langchain/test_callbacks.py b/posthog/test/ai/langchain/test_callbacks.py
index a1d96c1b..51d8339b 100644
--- a/posthog/test/ai/langchain/test_callbacks.py
+++ b/posthog/test/ai/langchain/test_callbacks.py
@@ -1716,7 +1716,7 @@ def test_combined_reasoning_and_cache_tokens(mock_client):
 
 
 @pytest.mark.skipif(not OPENAI_API_KEY, reason="OPENAI_API_KEY is not set")
-def test_openai_reasoning_tokens(mock_client):
+def test_openai_reasoning_tokens_o4_mini(mock_client):
     model = ChatOpenAI(
         api_key=OPENAI_API_KEY, model="o4-mini", max_completion_tokens=10
     )
diff --git a/posthog/test/integrations/test_middleware.py b/posthog/test/integrations/test_middleware.py
index 403c1b67..18f5309f 100644
--- a/posthog/test/integrations/test_middleware.py
+++ b/posthog/test/integrations/test_middleware.py
@@ -315,7 +315,9 @@ def test_sync_middleware_with_filter(self):
         get_response = Mock(return_value=mock_response)
 
         # Create middleware with request filter that filters all requests
-        request_filter = lambda req: False
+        def request_filter(req):
+            return False
+
         middleware = PosthogContextMiddleware.__new__(PosthogContextMiddleware)
         middleware.get_response = get_response
         middleware._is_coroutine = False