diff --git a/neqo-common/src/udp.rs b/neqo-common/src/udp.rs
index 0f68ce249..5c5418de0 100644
--- a/neqo-common/src/udp.rs
+++ b/neqo-common/src/udp.rs
@@ -147,11 +147,11 @@ mod tests {
 
         sleep(Duration::from_millis(100)).await;
 
-        // let tos_tx = IpTos::from((IpTosDscp::Le, IpTosEcn::Ce));
+        let tos_tx = IpTos::from((IpTosDscp::default(), IpTosEcn::Ce));
         let datagram = Datagram::new(
             sender.local_addr()?,
             receiver.local_addr()?,
-            Default::default(),
+            tos_tx,
             None,
             "Hello, world!".as_bytes().to_vec(),
         );