1 files changed, 6 insertions, 5 deletions
diff --git a/src/test/ui/consts/const-eval/ub-ref.rs b/src/test/ui/consts/const-eval/ub-ref.rs
index 584dc069169..c0dd94a375b 100644
--- a/src/test/ui/consts/const-eval/ub-ref.rs
+++ b/src/test/ui/consts/const-eval/ub-ref.rs
@@ -9,22 +9,23 @@
 // except according to those terms.
 
 #![feature(const_transmute)]
+#![allow(const_err)] // make sure we cannot allow away the errors tested here
 
 use std::mem;
 
 const UNALIGNED: &u16 = unsafe { mem::transmute(&[0u8; 4]) };
-//~^ ERROR this constant likely exhibits undefined behavior
+//~^ ERROR it is undefined behavior to use this value
 
 const NULL: &u16 = unsafe { mem::transmute(0usize) };
-//~^ ERROR this constant likely exhibits undefined behavior
+//~^ ERROR it is undefined behavior to use this value
 
 const REF_AS_USIZE: usize = unsafe { mem::transmute(&0) };
-//~^ ERROR this constant likely exhibits undefined behavior
+//~^ ERROR it is undefined behavior to use this value
 
 const REF_AS_USIZE_SLICE: &[usize] = &[unsafe { mem::transmute(&0) }];
-//~^ ERROR this constant likely exhibits undefined behavior
+//~^ ERROR it is undefined behavior to use this value
 
 const USIZE_AS_REF: &'static u8 = unsafe { mem::transmute(1337usize) };
-//~^ ERROR this constant likely exhibits undefined behavior
+//~^ ERROR it is undefined behavior to use this value
 
 fn main() {}