2 files changed, 10 insertions, 17 deletions
diff --git a/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.rs b/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.rs
index 8757d74082e..2b4963991db 100644
--- a/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.rs
+++ b/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.rs
@@ -1,10 +1,9 @@
 #![feature(const_trait_impl)]
 
 pub trait A {}
-//~^ NOTE: this trait must be annotated with `#[const_trait]`
+//~^ HELP: mark `A` as const
 
 impl const A for () {}
-//~^ ERROR: const `impl`s must be for traits marked with `#[const_trait]`
-//~| ERROR: ~const can only be applied to `#[const_trait]` traits
+//~^ ERROR: const `impl` for trait `A` which is not marked with `#[const_trait]`
 
 fn main() {}
diff --git a/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.stderr b/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.stderr
index f9c69d6c6bf..478adcf3e9e 100644
--- a/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.stderr
+++ b/src/test/ui/rfc-2632-const-trait-impl/const-impl-requires-const-trait.stderr
@@ -1,20 +1,14 @@
-error: const `impl`s must be for traits marked with `#[const_trait]`
-  --> $DIR/const-impl-requires-const-trait.rs:6:1
-   |
-LL | impl const A for () {}
-   | ^^^^^^^^^^^^^^^^^^^
-   |
-note: this trait must be annotated with `#[const_trait]`
-  --> $DIR/const-impl-requires-const-trait.rs:3:1
-   |
-LL | pub trait A {}
-   | ^^^^^^^^^^^
-
-error: ~const can only be applied to `#[const_trait]` traits
+error: const `impl` for trait `A` which is not marked with `#[const_trait]`
   --> $DIR/const-impl-requires-const-trait.rs:6:12
    |
+LL | pub trait A {}
+   | - help: mark `A` as const: `#[const_trait]`
+...
 LL | impl const A for () {}
    |            ^
+   |
+   = note: marking a trait with `#[const_trait]` ensures all default method bodies are `const`
+   = note: adding a non-const method body in the future would be a breaking change
 
-error: aborting due to 2 previous errors
+error: aborting due to previous error