diff --git a/tests/ui/rust-2024/reserved-guarded-strings-lexing.rs b/tests/ui/rust-2024/reserved-guarded-strings-lexing.rs
index 1784a2946a2bc..0e206037c1819 100644
--- a/tests/ui/rust-2024/reserved-guarded-strings-lexing.rs
+++ b/tests/ui/rust-2024/reserved-guarded-strings-lexing.rs
@@ -16,7 +16,5 @@ fn main() {
     // Non-ascii identifiers
     demo2!(Ñ"foo"); //~ ERROR prefix `Ñ` is unknown
     demo4!(Ñ#""#);  //~ ERROR prefix `Ñ` is unknown
-    demo3!(🙃#"");
-    //~^ ERROR prefix `🙃` is unknown
-    //~| WARNING identifier contains an uncommon character
+    demo3!(🙃#"");  //~ ERROR identifiers cannot contain emoji
 }
diff --git a/tests/ui/rust-2024/reserved-guarded-strings-lexing.stderr b/tests/ui/rust-2024/reserved-guarded-strings-lexing.stderr
index 53fa80aec0b4c..3937002723009 100644
--- a/tests/ui/rust-2024/reserved-guarded-strings-lexing.stderr
+++ b/tests/ui/rust-2024/reserved-guarded-strings-lexing.stderr
@@ -22,26 +22,11 @@ help: consider inserting whitespace here
 LL |     demo4!(Ñ #""#);
    |             +
 
-error: prefix `🙃` is unknown
-  --> $DIR/reserved-guarded-strings-lexing.rs:19:12
-   |
-LL |     demo3!(🙃#"");
-   |            ^^ unknown prefix
-   |
-   = note: prefixed identifiers and literals are reserved since Rust 2021
-help: consider inserting whitespace here
-   |
-LL |     demo3!(🙃 #"");
-   |              +
-
-warning: identifier contains an uncommon character: '🙃'
+error: identifiers cannot contain emoji: `🙃`
   --> $DIR/reserved-guarded-strings-lexing.rs:19:12
    |
 LL |     demo3!(🙃#"");
    |            ^^
-   |
-   = note: this character is included in the Unicode general security profile
-   = note: `#[warn(uncommon_codepoints)]` on by default
 
-error: aborting due to 3 previous errors; 1 warning emitted
+error: aborting due to 3 previous errors