diff --git a/tokio/src/sync/tests/atomic_waker.rs b/tokio/src/sync/tests/atomic_waker.rs
index b52d46c775e..8ebfb915f4a 100644
--- a/tokio/src/sync/tests/atomic_waker.rs
+++ b/tokio/src/sync/tests/atomic_waker.rs
@@ -4,7 +4,7 @@ use tokio_test::task;
 use std::task::Waker;
 
 trait AssertSend: Send {}
-trait AssertSync: Send {}
+trait AssertSync: Sync {}
 
 impl AssertSend for AtomicWaker {}
 impl AssertSync for AtomicWaker {}