diff --git a/src/tcp.rs b/src/tcp.rs
index d064374..64af98c 100644
--- a/src/tcp.rs
+++ b/src/tcp.rs
@@ -233,6 +233,7 @@ mod tests {
             1236,
             None,
             Duration::from_secs(1),
+            &DnsResolver::System,
         )
         .await
         .unwrap();