4 files changed, 9 insertions, 9 deletions
diff --git a/src/libstd/sync/mpsc/mod.rs b/src/libstd/sync/mpsc/mod.rs
index 1310d476f8e..ee8bef50d89 100644
--- a/src/libstd/sync/mpsc/mod.rs
+++ b/src/libstd/sync/mpsc/mod.rs
@@ -1157,8 +1157,8 @@ mod test {
 
     #[test]
     fn stress_shared() {
-        static AMT: u32 = 10000;
-        static NTHREADS: u32 = 8;
+        const AMT: u32 = 10000;
+        const NTHREADS: u32 = 8;
         let (tx, rx) = channel::<i32>();
 
         let t = thread::spawn(move|| {
@@ -1663,8 +1663,8 @@ mod sync_tests {
 
     #[test]
     fn stress_shared() {
-        static AMT: u32 = 1000;
-        static NTHREADS: u32 = 8;
+        const AMT: u32 = 1000;
+        const NTHREADS: u32 = 8;
         let (tx, rx) = sync_channel::<i32>(0);
         let (dtx, drx) = sync_channel::<()>(0);
 
diff --git a/src/libstd/sync/mpsc/select.rs b/src/libstd/sync/mpsc/select.rs
index 8de5bbc6206..2c14c9fe3f1 100644
--- a/src/libstd/sync/mpsc/select.rs
+++ b/src/libstd/sync/mpsc/select.rs
@@ -473,7 +473,7 @@ mod test {
 
     #[test]
     fn stress() {
-        static AMT: i32 = 10000;
+        const AMT: i32 = 10000;
         let (tx1, rx1) = channel::<i32>();
         let (tx2, rx2) = channel::<i32>();
         let (tx3, rx3) = channel::<()>();
diff --git a/src/libstd/sync/mutex.rs b/src/libstd/sync/mutex.rs
index 4c3b5d98a3c..6f0febd61e8 100644
--- a/src/libstd/sync/mutex.rs
+++ b/src/libstd/sync/mutex.rs
@@ -390,8 +390,8 @@ mod test {
     fn lots_and_lots() {
         static M: StaticMutex = MUTEX_INIT;
         static mut CNT: u32 = 0;
-        static J: u32 = 1000;
-        static K: u32 = 3;
+        const J: u32 = 1000;
+        const K: u32 = 3;
 
         fn inc() {
             for _ in 0..J {
diff --git a/src/libstd/sync/rwlock.rs b/src/libstd/sync/rwlock.rs
index 454c5b4f0cf..e9ff6c0bf9d 100644
--- a/src/libstd/sync/rwlock.rs
+++ b/src/libstd/sync/rwlock.rs
@@ -436,8 +436,8 @@ mod tests {
     #[test]
     fn frob() {
         static R: StaticRwLock = RW_LOCK_INIT;
-        static N: usize = 10;
-        static M: usize = 1000;
+        const N: usize = 10;
+        const M: usize = 1000;
 
         let (tx, rx) = channel::<()>();
         for _ in 0..N {