diff --git a/viz-core/tests/handler.rs b/viz-core/tests/handler.rs
index 51f13c1..3d12817 100644
--- a/viz-core/tests/handler.rs
+++ b/viz-core/tests/handler.rs
@@ -320,9 +320,11 @@ async fn handler() -> Result<()> {
         assert!(!y.is_empty());
 
         assert!(!v.is_empty());
+
+        let _ = v.last().unwrap().call(Request::default()).await;
     }
 
-    it_works().await;
+    let _: () = it_works().await;
 
     Ok(())
 }