diff --git a/library/test/src/lib.rs b/library/test/src/lib.rs
index 0c748da1a59cc..96a0897f57b5b 100644
--- a/library/test/src/lib.rs
+++ b/library/test/src/lib.rs
@@ -21,6 +21,7 @@
 #![feature(staged_api)]
 #![feature(process_exitcode_internals)]
 #![feature(test)]
+#![feature(restricted_std)]
 
 // Public reexports
 pub use self::bench::{black_box, Bencher};