diff --git a/rust-version b/rust-version
index 514517267a01..c6a3130a5a49 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-89631663b7ad2d46d3e4f52bcfa7bee2be9eb82b
+cf9cf7c923eb01146971429044f216a3ca905e06
diff --git a/tests/run-pass/concurrency/sync_singlethread.rs b/tests/run-pass/concurrency/sync_singlethread.rs
index 749db855e296..ab0203906d36 100644
--- a/tests/run-pass/concurrency/sync_singlethread.rs
+++ b/tests/run-pass/concurrency/sync_singlethread.rs
@@ -1,5 +1,3 @@
-#![feature(rustc_private, renamed_spin_loop)]
-
 use std::sync::{Mutex, TryLockError};
 use std::sync::atomic;
 use std::hint;