diff --git a/.gitignore b/.gitignore
index b154d3b56..ae480f00b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -85,7 +85,7 @@ ENV/
 env.bak/
 venv.bak/
 
-# mypy
+# Python type checker caches
 .mypy_cache/
 .dmypy.json
 dmypy.json
diff --git a/libs/langgraph/tests/test_stream_events_v3.py b/libs/langgraph/tests/test_stream_events_v3.py
index 6399b3084..cc9c9ec9a 100644
--- a/libs/langgraph/tests/test_stream_events_v3.py
+++ b/libs/langgraph/tests/test_stream_events_v3.py
@@ -1150,7 +1150,7 @@ class TestV2ValidationErrors:
 
 
 # --- type narrowing compile-time checks ---
-# These assert_type calls verify that mypy narrows the union correctly.
+# These assert_type calls verify that the type checker narrows the union correctly.
 
 
 _OutputT = TypeVar("_OutputT")