diff --git a/tests/ui/cast_size.r32bit.stderr b/tests/ui/cast_size.r32bit.stderr
index 5de19f5775..2f7eeda385 100644
--- a/tests/ui/cast_size.r32bit.stderr
+++ b/tests/ui/cast_size.r32bit.stderr
@@ -28,13 +28,13 @@
 LL |     x1 as f32;
    |     ^^^^^^^^^
 
-error: casting `isize` to `f64` may cause a loss of precision on targets with 64-bit wide pointers (`isize` is 64 bits wide, but `f64`'s mantissa is only 52 bits wide)
+error: casting `isize` to `f64` may cause a loss of precision (`isize` can be up to 64 bits wide depending on the target architecture, but `f64`'s mantissa is only 52 bits wide)
   --> tests/ui/cast_size.rs:28:5
    |
 LL |     x0 as f64;
    |     ^^^^^^^^^
 
-error: casting `usize` to `f64` may cause a loss of precision on targets with 64-bit wide pointers (`usize` is 64 bits wide, but `f64`'s mantissa is only 52 bits wide)
+error: casting `usize` to `f64` may cause a loss of precision (`usize` can be up to 64 bits wide depending on the target architecture, but `f64`'s mantissa is only 52 bits wide)
   --> tests/ui/cast_size.rs:30:5
    |
 LL |     x1 as f64;
@@ -171,7 +171,7 @@
 LL |     999_999_999 as f32;
    |     ^^^^^^^^^^^^^^^^^^
 
-error: casting `usize` to `f64` may cause a loss of precision on targets with 64-bit wide pointers (`usize` is 64 bits wide, but `f64`'s mantissa is only 52 bits wide)
+error: casting `usize` to `f64` may cause a loss of precision (`usize` can be up to 64 bits wide depending on the target architecture, but `f64`'s mantissa is only 52 bits wide)
   --> tests/ui/cast_size.rs:63:5
    |
 LL |     9_999_999_999_999_999usize as f64;