test: Update tests to use the new syntax.
diff --git a/src/test/run-pass/trait-inheritance-num5.rs b/src/test/run-pass/trait-inheritance-num5.rs
index f189763..f56eca6 100644
--- a/src/test/run-pass/trait-inheritance-num5.rs
+++ b/src/test/run-pass/trait-inheritance-num5.rs
@@ -8,8 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::cmp::{Eq, Ord};
-use core::num::NumCast;
+use std::cmp::{Eq, Ord};
+use std::num::NumCast;
 
 pub trait NumExt: Eq + Num + NumCast {}