diff --git a/crates/ruff_python_formatter/src/expression/mod.rs b/crates/ruff_python_formatter/src/expression/mod.rs
index d0ad344b484b32..7d858694c04368 100644
--- a/crates/ruff_python_formatter/src/expression/mod.rs
+++ b/crates/ruff_python_formatter/src/expression/mod.rs
@@ -529,7 +529,7 @@ impl<'ast> IntoFormat<PyFormatContext<'ast>> for Expr {
 ///
 /// This mimics Black's [`_maybe_split_omitting_optional_parens`](https://github.com/psf/black/blob/d1248ca9beaf0ba526d265f4108836d89cf551b7/src/black/linegen.py#L746-L820)
 #[allow(clippy::if_same_then_else)]
-pub(crate) fn can_omit_optional_parentheses(expr: &Expr, context: &PyFormatContext) -> bool {
+fn can_omit_optional_parentheses(expr: &Expr, context: &PyFormatContext) -> bool {
     let mut visitor = CanOmitOptionalParenthesesVisitor::new(context);
     visitor.visit_subexpression(expr);