diff --git a/keyforkd/src/middleware.rs b/keyforkd/src/middleware.rs
index b8b7b59..7f2f7ea 100644
--- a/keyforkd/src/middleware.rs
+++ b/keyforkd/src/middleware.rs
@@ -100,6 +100,14 @@ mod tests {
         field: String,
     }
 
+    impl Test {
+        fn new() -> Self {
+            Self {
+                field: "hello world!".to_string()
+            }
+        }
+    }
+
     struct App;
 
     #[derive(Debug, thiserror::Error)]
@@ -118,15 +126,16 @@ mod tests {
         }
 
         fn call(&mut self, req: Test) -> Self::Future {
-            Box::pin(async { Ok(req) })
+            Box::pin(async {
+                assert_eq!(req.field, Test::new().field);
+                Ok(req)
+            })
         }
     }
 
     #[tokio::test]
     async fn can_serde_responses() {
-        let content = serialize(&Test {
-            field: "hello world!".to_string(),
-        })
+        let content = serialize(&Test::new())
         .unwrap();
         let mut service = ServiceBuilder::new()
             .layer(BincodeLayer::<Test>::new())