util: wait for both subsystem and test_future to finish

node/subsystem-util/src/lib.rs

@@ -1161,13 +1161,16 @@ mod tests {
 
 		futures::pin_mut!(subsystem, test_future, timeout);
 
-		executor::block_on(async move {
-			futures::select! {
-				_ = test_future.fuse() => (),
-				_ = subsystem.fuse() => (),
-				_ = timeout.fuse() => panic!("test timed out instead of completing"),
-			}
-		});
+		futures::executor::block_on(
+			futures::future::select(
+				// wait for both to finish
+				futures::future::join(subsystem, test_future),
+				timeout,
+			).then(|either| match either {
+				futures::future::Either::Right(_) => panic!("test timed out instead of completing"),
+				futures::future::Either::Left(_) => futures::future::ready(()),
+			})
+		);
 	}
 
 	#[test]