diff --git a/src/test/auxiliary/linkage-visibility.rs b/src/test/auxiliary/linkage-visibility.rs
index d96dfd848f3f0..e04029a4e767f 100644
--- a/src/test/auxiliary/linkage-visibility.rs
+++ b/src/test/auxiliary/linkage-visibility.rs
@@ -10,6 +10,10 @@
 
 #![feature(std_misc, old_path)]
 
+// We're testing linkage visibility; the compiler warns us, but we want to
+// do the runtime check that these functions aren't exported.
+#![allow(private_no_mangle_fns)]
+
 use std::dynamic_lib::DynamicLibrary;
 
 #[no_mangle]
@@ -25,6 +29,7 @@ pub fn foo2<T>() {
 #[no_mangle]
 fn bar() { }
 
+#[allow(dead_code)]
 #[no_mangle]
 fn baz() { }