diff --git a/src/fallback.rs b/src/fallback.rs
index 6b7837e8..6afa790f 100644
--- a/src/fallback.rs
+++ b/src/fallback.rs
@@ -702,7 +702,7 @@ fn validate_ident(string: &str, raw: bool) {
     if raw {
         match string {
             "_" | "super" | "self" | "Self" | "crate" => {
-                panic!("`{}` cannot be a raw identifier", string);
+                panic!("`r#{}` cannot be a raw identifier", string);
             }
             _ => {}
         }
diff --git a/tests/test.rs b/tests/test.rs
index 0de78c38..86031db6 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -24,13 +24,13 @@ fn raw_idents() {
 }
 
 #[test]
-#[should_panic(expected = "`_` cannot be a raw identifier")]
+#[should_panic(expected = "`r#_` cannot be a raw identifier")]
 fn ident_raw_underscore() {
     Ident::new_raw("_", Span::call_site());
 }
 
 #[test]
-#[should_panic(expected = "`super` cannot be a raw identifier")]
+#[should_panic(expected = "`r#super` cannot be a raw identifier")]
 fn ident_raw_reserved() {
     Ident::new_raw("super", Span::call_site());
 }