diff --git a/Rocket.toml b/Rocket.toml
index 7be34da..d916684 100644
--- a/Rocket.toml
+++ b/Rocket.toml
@@ -1,5 +1,6 @@
 [development.databases]
 stoptime_db = { url = "db/stoptime-dev.db" }
+stoptime_test_db = { url = "db/stoptime-test.db" }
 
 [production.databases]
 stoptime_db = { url = "db/stoptime.db" }
diff --git a/src/main.rs b/src/main.rs
index 2c098e4..52ed43e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,6 +6,7 @@ extern crate diesel;
 #[macro_use]
 extern crate diesel_migrations;
 
+use rocket::fairing::AdHoc;
 use rocket::{catchers, routes, Rocket};
 use rocket_contrib::database;
 use rocket_contrib::serve::StaticFiles;
@@ -24,11 +25,20 @@ pub mod schema;
 // the database.
 embed_migrations!();
 
+#[cfg(not(test))]
 #[database("stoptime_db")]
 pub struct DbConn(diesel::SqliteConnection);
 
+#[cfg(test)]
+#[database("stoptime_test_db")]
+pub struct DbConn(diesel::SqliteConnection);
+
+#[cfg(test)]
+pub mod seed;
+
 /// Runs the database migrations.
 fn run_db_migrations(rocket: Rocket) -> Result<Rocket, Rocket> {
+    println!("    => Running database migrations…");
     let conn = DbConn::get_one(&rocket).expect("Failed to get a database connection");
     match embedded_migrations::run(&*conn) {
         Ok(()) => Ok(rocket),
@@ -39,6 +49,20 @@ fn run_db_migrations(rocket: Rocket) -> Result<Rocket, Rocket> {
     }
 }
 
+/// Run the database seeding (only during tests).
+fn run_db_seeding(rocket: Rocket) -> Result<Rocket, Rocket> {
+    #[cfg(test)]
+    {
+        println!("    => Running database seeding…");
+        let conn = DbConn::get_one(&rocket).expect("Failed to get a database connection");
+        if let Err(e) = crate::seed::run(conn) {
+            eprintln!("Failed to run database seeding: {:?}", e);
+            return Err(rocket);
+        }
+    }
+    Ok(rocket)
+}
+
 /// Sets up the Rocket application.
 fn rocket() -> Rocket {
     let static_dir = concat!(env!("CARGO_MANIFEST_DIR"), "/static");
@@ -47,6 +71,7 @@ fn rocket() -> Rocket {
     rocket::ignite()
         .attach(DbConn::fairing())
         .attach(AdHoc::on_attach("Database Migrations", run_db_migrations))
+        .attach(AdHoc::on_attach("Database Seed", run_db_seeding))
         .mount("/", routes![handlers::index])
         .mount(
             "/company",
diff --git a/src/rest_helpers.rs b/src/rest_helpers.rs
index be1a133..ff5c886 100644
--- a/src/rest_helpers.rs
+++ b/src/rest_helpers.rs
@@ -62,3 +62,13 @@ macro_rules! delete {
         }
     }};
 }
+
+macro_rules! destroy_all {
+    ($model_name:ident, $conn:expr) => {{
+        use diesel::associations::HasTable;
+        use diesel::RunQueryDsl;
+
+        let table = $crate::models::$model_name::table();
+        diesel::delete(table).execute(&$conn)
+    }};
+}
diff --git a/src/seed.rs b/src/seed.rs
new file mode 100644
index 0000000..ac6f0b7
--- /dev/null
+++ b/src/seed.rs
@@ -0,0 +1,41 @@
+use diesel::prelude::*;
+
+use crate::models::{Customer, NewCustomer};
+use crate::DbConn;
+
+pub fn run(conn: DbConn) -> Result<(), &'static str> {
+    destroy_all!(Customer, *conn).map_err(|_| "Could not destroy all customers")?;
+    create!(Customer, new_customer("one"), *conn).expect("foo");
+    create!(Customer, new_customer("two"), *conn).expect("foo");
+    Ok(())
+}
+
+pub fn new_customer(key: &'static str) -> NewCustomer {
+    match key {
+        "one" => NewCustomer {
+            address_city: "Some City".to_string(),
+            address_postal_code: "123456".to_string(),
+            address_street: "Somestreet".to_string(),
+            email: "info@testcompany.tld".to_string(),
+            financial_contact: "Financial Office".to_string(),
+            hourly_rate: Some(100.0),
+            name: "Test Company".to_string(),
+            phone: "0123456789".to_string(),
+            short_name: "Test Co.".to_string(),
+            time_specification: true,
+        },
+        "two" => NewCustomer {
+            address_city: "Other City".to_string(),
+            address_postal_code: "654321".to_string(),
+            address_street: "Otherstreet".to_string(),
+            email: "info@testcompany2.tld".to_string(),
+            financial_contact: "Financial Office".to_string(),
+            hourly_rate: None,
+            name: "Test Company 2".to_string(),
+            phone: "0987654321".to_string(),
+            short_name: "Test 2 Co.".to_string(),
+            time_specification: false,
+        },
+        &_ => unimplemented!(),
+    }
+}