diff --git a/src/handler.rs b/src/handler.rs
index cafb90867..0a1bd9f59 100644
--- a/src/handler.rs
+++ b/src/handler.rs
@@ -247,7 +247,7 @@ impl<I, E> Reply<I, E> {
     #[cfg(test)]
     pub(crate) fn as_msg(&self) -> &I {
         match self.0.as_ref().unwrap() {
-            ReplyResult::Ok(ref resp) => resp,
+            &ReplyResult::Ok(ref resp) => resp,
             _ => panic!(),
         }
     }
@@ -255,7 +255,7 @@ impl<I, E> Reply<I, E> {
     #[cfg(test)]
     pub(crate) fn as_err(&self) -> Option<&E> {
         match self.0.as_ref().unwrap() {
-            ReplyResult::Err(ref err) => Some(err),
+            &ReplyResult::Err(ref err) => Some(err),
             _ => None,
         }
     }
diff --git a/src/middleware/session.rs b/src/middleware/session.rs
index 13948ac2a..b926842f5 100644
--- a/src/middleware/session.rs
+++ b/src/middleware/session.rs
@@ -37,7 +37,7 @@
 //! use actix_web::{server, App, HttpRequest, Result};
 //! use actix_web::middleware::session::{RequestSession, SessionStorage, CookieSessionBackend};
 //!
-//! fn index(mut req: HttpRequest) -> Result<&'static str> {
+//! fn index(req: HttpRequest) -> Result<&'static str> {
 //!     // access session data
 //!     if let Some(count) = req.session().get::<i32>("counter")? {
 //!         println!("SESSION value: {}", count);
@@ -525,3 +525,30 @@ impl<S> SessionBackend<S> for CookieSessionBackend {
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use application::App;
+    use test;
+
+    #[test]
+    fn cookie_session() {
+        let mut srv = test::TestServer::with_factory(|| {
+            App::new()
+                .middleware(SessionStorage::new(
+                    CookieSessionBackend::signed(&[0; 32]).secure(false),
+                ))
+                .resource("/", |r| {
+                    r.f(|req| {
+                        let _ = req.session().set("counter", 100);
+                        "test"
+                    })
+                })
+        });
+
+        let request = srv.get().uri(srv.url("/")).finish().unwrap();
+        let response = srv.execute(request.send()).unwrap();
+        assert!(response.cookie("actix-session").is_some());
+    }
+}