diff --git a/src/test/agent_test.rs b/src/test/agent_test.rs
index 762f734..6beee76 100644
--- a/src/test/agent_test.rs
+++ b/src/test/agent_test.rs
@@ -43,14 +43,11 @@ fn agent_cookies() {
     assert!(agent.cookie("foo").is_some());
     assert_eq!(agent.cookie("foo").unwrap().value(), "bar baz");
 
-    test::set_handler("/agent_cookies", |_unit| {
+    test::set_handler("/agent_cookies", |unit| {
+        assert!(unit.has("cookie"));
+        assert_eq!(unit.header("cookie").unwrap(), "foo=bar%20baz");
         test::make_response(200, "OK", vec![], vec![])
     });
 
-    let resp = agent.get("test://host/agent_cookies").call();
-
-    let vec = resp.to_write_vec();
-    let s = String::from_utf8_lossy(&vec);
-
-    assert!(s.contains("Cookie: foo=bar%20baz\r\n"));
+    agent.get("test://host/agent_cookies").call();
 }