diff --git a/tests/ui/discriminant.stderr b/tests/ui/discriminant.stderr
index 9654884..10caf69 100644
--- a/tests/ui/discriminant.stderr
+++ b/tests/ui/discriminant.stderr
@@ -5,6 +5,7 @@ error[E0552]: unrecognized representation hint
   |        ^
   |
   = help: valid reprs are `Rust` (default), `C`, `align`, `packed`, `transparent`, `simd`, `i8`, `u8`, `i16`, `u16`, `i32`, `u32`, `i64`, `u64`, `i128`, `u128`, `isize`, `usize`
+  = note: for more information, visit <https://doc.rust-lang.org/reference/type-layout.html?highlight=repr#representations>
 
 error[E0732]: `#[repr(inttype)]` must be specified for enums with explicit discriminants and non-unit variants
   --> tests/ui/discriminant.rs:12:1