diff --git a/ruff.toml b/ruff.toml
index c88204d650..0795d9b9de 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -7,8 +7,7 @@ extend-exclude = ["tools/chromiumos/gen_autosuspend_rules.py"]
 [lint]
 select = ["E", "F", "I", "Q", "UP"]
 # E501: line-too-long
-# E731: lambda-assignment
-ignore = ["E501", "E731"]
+ignore = ["E501"]
 
 [format]
 # The formatter prefers double quotes for multiline quotes,