diff --git a/zebra-network/src/message.rs b/zebra-network/src/message.rs
index d5414479..5f692694 100644
--- a/zebra-network/src/message.rs
+++ b/zebra-network/src/message.rs
@@ -677,7 +677,7 @@ mod tests {
 
         let v_bytes = {
             let mut bytes = Vec::new();
-            v.zcash_serialize(
+            let _ = v.zcash_serialize(
                 Cursor::new(&mut bytes),
                 crate::constants::magics::MAINNET,
                 crate::constants::CURRENT_VERSION,