diff --git a/src/routes/mod.rs b/src/routes/mod.rs
index d688a9c..32cf85e 100644
--- a/src/routes/mod.rs
+++ b/src/routes/mod.rs
@@ -14,7 +14,7 @@ use warp::http::header::{
 use warp::http::{Response, StatusCode};
 use warp::{path, Filter, Rejection, Reply};
 
-pub fn routes(pool: &'static PgPool) -> impl Filter<Extract = (impl Reply,)> {
+pub fn routes(pool: &'static PgPool) -> impl Filter<Extract = (impl Reply,), Error = Rejection> {
     let pool = warp::any().map(move || pool);
     let index = warp::path::end()
         .and(warp::get2())
@@ -100,23 +100,58 @@ fn not_found(rejection: Rejection) -> Result<impl Reply, Rejection> {
 mod test {
     use super::routes;
     use crate::PgPool;
-    use diesel::r2d2::{ConnectionManager, Pool};
+    use diesel::r2d2::{ConnectionManager, CustomizeConnection, Pool};
+    use diesel::Connection;
     use lazy_static::lazy_static;
     use scraper::{Html, Selector};
     use serde::Deserialize;
     use std::env;
     use std::str;
+    use warp::filters::BoxedFilter;
+    use warp::http::header::{CONTENT_LENGTH, LOCATION};
+    use warp::reply::{Reply, Response};
+    use warp::Filter;
 
     lazy_static! {
         static ref POOL: PgPool = {
-            let pool = Pool::new(ConnectionManager::new(
-                env::var("DATABASE_URL")
-                    .expect("Setting DATABASE_URL environment variable required to run tests"),
-            ))
-            .expect("Couldn't create a connection pool");
+            let pool = Pool::builder()
+                .connection_customizer(Box::new(ExecuteWithinTransaction))
+                .max_size(1)
+                .build(ConnectionManager::new(env::var("DATABASE_URL").expect(
+                    "Setting DATABASE_URL environment variable required to run tests",
+                )))
+                .expect("Couldn't create a connection pool");
             diesel_migrations::run_pending_migrations(&pool.get().unwrap()).unwrap();
             pool
         };
+        static ref ROUTES: BoxedFilter<(Response,)> =
+            routes(&POOL).map(Reply::into_response).boxed();
+    }
+
+    #[derive(Debug)]
+    struct ExecuteWithinTransaction;
+
+    impl<C, E> CustomizeConnection<C, E> for ExecuteWithinTransaction
+    where
+        C: Connection,
+    {
+        fn on_acquire(&self, conn: &mut C) -> Result<(), E> {
+            conn.begin_test_transaction().unwrap();
+            Ok(())
+        }
+    }
+
+    fn get_html_id() -> String {
+        let response = warp::test::request().reply(&*ROUTES);
+        let document = Html::parse_document(str::from_utf8(response.body()).unwrap());
+        document
+            .select(&Selector::parse("#language option").unwrap())
+            .find(|element| element.text().next() == Some("HTML"))
+            .expect("a language called HTML to exist")
+            .value()
+            .attr("value")
+            .expect("an ID")
+            .to_string()
     }
 
     #[test]
@@ -127,19 +162,9 @@ mod test {
             mode: &'a str,
             mime: &'a str,
         }
-        let routes = routes(&POOL);
-        let response = warp::test::request().reply(&routes);
-        let document = Html::parse_document(str::from_utf8(response.body()).unwrap());
-        let id = document
-            .select(&Selector::parse("#language option").unwrap())
-            .find(|element| element.text().next() == Some("HTML"))
-            .expect("a language called HTML to exist")
-            .value()
-            .attr("value")
-            .expect("an ID");
         let response = warp::test::request()
-            .path(&format!("/api/v0/language/{}", id))
-            .reply(&routes);
+            .path(&format!("/api/v0/language/{}", get_html_id()))
+            .reply(&*ROUTES);
         assert_eq!(
             serde_json::from_slice::<ApiLanguage>(response.body()).unwrap(),
             ApiLanguage {
@@ -148,4 +173,22 @@ mod test {
             },
         );
     }
+
+    #[test]
+    fn test_raw_pastes() {
+        let body = format!("language={}&code=abc", get_html_id());
+        let reply = warp::test::request()
+            .method("POST")
+            .header(CONTENT_LENGTH, body.len())
+            .body(body)
+            .reply(&*ROUTES);
+        let location = reply.headers()[LOCATION].to_str().unwrap();
+        assert_eq!(
+            warp::test::request()
+                .path(&format!("{}.txt", location))
+                .reply(&*ROUTES)
+                .body(),
+            "abc"
+        );
+    }
 }