diff --git a/tests/run-pass/threads.rs b/tests/run-pass/sync.rs
similarity index 80%
rename from tests/run-pass/threads.rs
rename to tests/run-pass/sync.rs
index dad47d85a246..54d79566eae4 100644
--- a/tests/run-pass/threads.rs
+++ b/tests/run-pass/sync.rs
@@ -8,8 +8,7 @@ fn main() {
     drop(m.lock());
     drop(m);
 
-    // We don't provide RwLock on Windows
-    #[cfg(not(target_os = "windows"))]
+    #[cfg(not(target_os = "windows"))] // TODO: implement RwLock on Windows
     {
         let rw = sync::RwLock::new(0);
         drop(rw.read());