diff --git a/tests/test_expr.rs b/tests/test_expr.rs
index e86d33a..6519635 100644
--- a/tests/test_expr.rs
+++ b/tests/test_expr.rs
@@ -39,8 +39,7 @@ pub enum RustupError {
         "toolchain '{name}' does not contain component {component}{}",
         .suggestion
             .as_ref()
-            .map(|s| format!("; did you mean '{}'?", s))
-            .unwrap_or_else(String::new),
+            .map_or_else(String::new, |s| format!("; did you mean '{}'?", s)),
     )]
     UnknownComponent {
         name: String,