diff --git a/futures/tests/async_await_macros.rs b/futures/tests/async_await_macros.rs
index c7ad0d672b..1604644f2a 100644
--- a/futures/tests/async_await_macros.rs
+++ b/futures/tests/async_await_macros.rs
@@ -175,7 +175,7 @@ fn join_size() {
         let ready2 = future::ready(0i32);
         join!(ready1, ready2)
     };
-    assert_eq!(::std::mem::size_of_val(&fut), 44);
+    assert_eq!(::std::mem::size_of_val(&fut), 32);
 }
 
 #[test]
@@ -191,7 +191,7 @@ fn try_join_size() {
         let ready2 = future::ready(Ok::<i32, i32>(0));
         try_join!(ready1, ready2)
     };
-    assert_eq!(::std::mem::size_of_val(&fut), 44);
+    assert_eq!(::std::mem::size_of_val(&fut), 32);
 }