diff --git a/examples/json/Cargo.toml b/examples/json/Cargo.toml
index 310b344f..d95ee879 100644
--- a/examples/json/Cargo.toml
+++ b/examples/json/Cargo.toml
@@ -9,7 +9,6 @@ rocket_codegen = { path = "../../codegen" }
 serde = "0.9"
 serde_json = "0.9"
 serde_derive = "0.9"
-lazy_static = "*"
 
 [dependencies.rocket_contrib]
 path = "../../contrib"
diff --git a/examples/json/src/main.rs b/examples/json/src/main.rs
index 50de2eb0..1b1fb424 100644
--- a/examples/json/src/main.rs
+++ b/examples/json/src/main.rs
@@ -3,13 +3,13 @@
 
 extern crate rocket;
 extern crate serde_json;
-#[macro_use] extern crate lazy_static;
 #[macro_use] extern crate rocket_contrib;
 #[macro_use] extern crate serde_derive;
 
 #[cfg(test)] mod tests;
 
 use rocket_contrib::{JSON, Value};
+use rocket::State;
 use std::collections::HashMap;
 use std::sync::Mutex;
 
@@ -17,9 +17,7 @@ use std::sync::Mutex;
 type ID = usize;
 
 // We're going to store all of the messages here. No need for a DB.
-lazy_static! {
-    static ref MAP: Mutex<HashMap<ID, String>> = Mutex::new(HashMap::new());
-}
+type MessageMap = Mutex<HashMap<ID, String>>;
 
 #[derive(Serialize, Deserialize)]
 struct Message {
@@ -29,8 +27,8 @@ struct Message {
 
 // TODO: This example can be improved by using `route` with muliple HTTP verbs.
 #[post("/<id>", format = "application/json", data = "<message>")]
-fn new(id: ID, message: JSON<Message>) -> JSON<Value> {
-    let mut hashmap = MAP.lock().expect("map lock.");
+fn new(id: ID, message: JSON<Message>, map: State<MessageMap>) -> JSON<Value> {
+    let mut hashmap = map.lock().expect("map lock.");
     if hashmap.contains_key(&id) {
         JSON(json!({
             "status": "error",
@@ -43,8 +41,8 @@ fn new(id: ID, message: JSON<Message>) -> JSON<Value> {
 }
 
 #[put("/<id>", format = "application/json", data = "<message>")]
-fn update(id: ID, message: JSON<Message>) -> Option<JSON<Value>> {
-    let mut hashmap = MAP.lock().unwrap();
+fn update(id: ID, message: JSON<Message>, map: State<MessageMap>) -> Option<JSON<Value>> {
+    let mut hashmap = map.lock().unwrap();
     if hashmap.contains_key(&id) {
         hashmap.insert(id, message.0.contents);
         Some(JSON(json!({ "status": "ok" })))
@@ -54,8 +52,8 @@ fn update(id: ID, message: JSON<Message>) -> Option<JSON<Value>> {
 }
 
 #[get("/<id>", format = "application/json")]
-fn get(id: ID) -> Option<JSON<Message>> {
-    let hashmap = MAP.lock().unwrap();
+fn get(id: ID, map: State<MessageMap>) -> Option<JSON<Message>> {
+    let hashmap = map.lock().unwrap();
     hashmap.get(&id).map(|contents| {
         JSON(Message {
             id: Some(id),
@@ -72,9 +70,13 @@ fn not_found() -> JSON<Value> {
     }))
 }
 
-fn main() {
+fn rocket() -> rocket::Rocket {
     rocket::ignite()
         .mount("/message", routes![new, update, get])
         .catch(errors![not_found])
-        .launch();
+        .manage(Mutex::new(HashMap::<ID, String>::new()))
+}
+
+fn main() {
+    rocket().launch();
 }
diff --git a/examples/json/src/tests.rs b/examples/json/src/tests.rs
index 4476ed0c..dc3a4cdb 100644
--- a/examples/json/src/tests.rs
+++ b/examples/json/src/tests.rs
@@ -5,21 +5,19 @@ use rocket::http::{Status, ContentType};
 use rocket::Response;
 
 macro_rules! run_test {
-    ($req:expr, $test_fn:expr) => ({
-        let rocket = rocket::ignite()
-            .mount("/message", routes![super::new, super::update, super::get])
-            .catch(errors![super::not_found]);
-
+    ($rocket: expr, $req:expr, $test_fn:expr) => ({
         let mut req = $req;
-        $test_fn(req.dispatch_with(&rocket));
+        $test_fn(req.dispatch_with($rocket));
     })
 }
 
 #[test]
 fn bad_get_put() {
+    let rocket = rocket();
+
     // Try to get a message with an ID that doesn't exist.
     let req = MockRequest::new(Get, "/message/99").header(ContentType::JSON);
-    run_test!(req, |mut response: Response| {
+    run_test!(&rocket, req, |mut response: Response| {
         assert_eq!(response.status(), Status::NotFound);
 
         let body = response.body().unwrap().into_string().unwrap();
@@ -29,7 +27,7 @@ fn bad_get_put() {
 
     // Try to get a message with an invalid ID.
     let req = MockRequest::new(Get, "/message/hi").header(ContentType::JSON);
-    run_test!(req, |mut response: Response| {
+    run_test!(&rocket, req, |mut response: Response| {
         assert_eq!(response.status(), Status::NotFound);
         let body = response.body().unwrap().into_string().unwrap();
         assert!(body.contains("error"));
@@ -37,7 +35,7 @@ fn bad_get_put() {
 
     // Try to put a message without a proper body.
     let req = MockRequest::new(Put, "/message/80").header(ContentType::JSON);
-    run_test!(req, |response: Response| {
+    run_test!(&rocket, req, |response: Response| {
         assert_eq!(response.status(), Status::BadRequest);
     });
 
@@ -46,16 +44,17 @@ fn bad_get_put() {
         .header(ContentType::JSON)
         .body(r#"{ "contents": "Bye bye, world!" }"#);
 
-    run_test!(req, |response: Response| {
+    run_test!(&rocket, req, |response: Response| {
         assert_eq!(response.status(), Status::NotFound);
     });
 }
 
 #[test]
 fn post_get_put_get() {
+    let rocket = rocket();
     // Check that a message with ID 1 doesn't exist.
     let req = MockRequest::new(Get, "/message/1").header(ContentType::JSON);
-    run_test!(req, |response: Response| {
+    run_test!(&rocket, req, |response: Response| {
         assert_eq!(response.status(), Status::NotFound);
     });
 
@@ -64,13 +63,13 @@ fn post_get_put_get() {
         .header(ContentType::JSON)
         .body(r#"{ "contents": "Hello, world!" }"#);
 
-    run_test!(req, |response: Response| {
+    run_test!(&rocket, req, |response: Response| {
         assert_eq!(response.status(), Status::Ok);
     });
 
     // Check that the message exists with the correct contents.
     let req = MockRequest::new(Get, "/message/1") .header(ContentType::JSON);
-    run_test!(req, |mut response: Response| {
+    run_test!(&rocket, req, |mut response: Response| {
         assert_eq!(response.status(), Status::Ok);
         let body = response.body().unwrap().into_string().unwrap();
         assert!(body.contains("Hello, world!"));
@@ -81,13 +80,13 @@ fn post_get_put_get() {
         .header(ContentType::JSON)
         .body(r#"{ "contents": "Bye bye, world!" }"#);
 
-    run_test!(req, |response: Response| {
+    run_test!(&rocket, req, |response: Response| {
         assert_eq!(response.status(), Status::Ok);
     });
 
     // Check that the message exists with the updated contents.
     let req = MockRequest::new(Get, "/message/1") .header(ContentType::JSON);
-    run_test!(req, |mut response: Response| {
+    run_test!(&rocket, req, |mut response: Response| {
         assert_eq!(response.status(), Status::Ok);
         let body = response.body().unwrap().into_string().unwrap();
         assert!(!body.contains("Hello, world!"));