diff --git a/Cargo.toml b/Cargo.toml
index 75c352d..928e23d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,3 +25,13 @@ serde = "1.0"
 futures-util = "0.3"
 reqwest = { version = "0.11", default-features = false }
 urlencoding = "2.1"
+
+[dev-dependencies]
+axum-test = "15.7.1"
+testcontainers = "0.22.0"
+reqwest = { version = "0.11", default-features = false, features = ["cookies"] }
+tower = { version = "0.5.1", features = ["util"] }
+tokio = { version = "1.40.0", features = ["full"] }
+regex = "1.10.6"
+serde_json = "1.0.128"
+tower-sessions = { version = "0.12", default-features = false, features = [ "memory-store", "axum-core" ] }
diff --git a/tests/integration.rs b/tests/integration.rs
new file mode 100644
index 0000000..13473b1
--- /dev/null
+++ b/tests/integration.rs
@@ -0,0 +1,123 @@
+
+use axum::{error_handling::HandleErrorLayer, routing::get};
+use axum_oidc::EmptyAdditionalClaims;
+use keycloak::Keycloak;
+use utils::handle_axum_oidc_middleware_error;
+
+mod keycloak;
+mod utils;
+
+#[tokio::test(flavor = "multi_thread")]
+async fn basic_login_oidc() {
+    let john = keycloak::User {
+        username: "jojo".to_string(),
+        email: "john.doe@example.com".to_string(),
+        firstname: "john".to_string(),
+        lastname: "doe".to_string(),
+        password: "jopass".to_string(),
+    };
+
+    let basic_client = keycloak::Client {
+        client_id: "axum-oidc-example-basic".to_string(),
+        client_secret: Some("123456".to_string()),
+        ..Default::default()
+    };
+
+    let realm_name = "test";
+
+    let keycloak = Keycloak::start(vec![keycloak::Realm {
+        name: realm_name.to_string(),
+        clients: vec![basic_client.clone()],
+        users: vec![], // Not used here, needed for id
+    }])
+    .await
+    .unwrap();
+    let id = keycloak.create_user(&john.username, &john.email, &john.firstname, &john.lastname, &john.password, realm_name).await;
+
+    let keycloak_url = keycloak.url();
+    let issuer = format!("{keycloak_url}/realms/{realm_name}");
+
+    let login_service = tower::ServiceBuilder::new()
+        .layer(HandleErrorLayer::new(handle_axum_oidc_middleware_error))
+        .layer(axum_oidc::OidcLoginLayer::<EmptyAdditionalClaims>::new());
+
+    let oidc_client = axum_oidc::OidcAuthLayer::<EmptyAdditionalClaims>::discover_client(
+        axum::http::Uri::from_static("http://localhost:3000"),
+        issuer,
+        basic_client.client_id,
+        basic_client.client_secret,
+        vec![]
+    )
+    .await
+    .expect("Cannot create OIDC client");
+
+    let auth_service = tower::ServiceBuilder::new()
+        .layer(HandleErrorLayer::new(handle_axum_oidc_middleware_error))
+        .layer(oidc_client);
+
+    let session_store = tower_sessions::MemoryStore::default();
+    let session_layer = tower_sessions::SessionManagerLayer::new(session_store)
+        .with_same_site(tower_sessions::cookie::SameSite::None)
+        .with_expiry(tower_sessions::Expiry::OnInactivity(
+            tower_sessions::cookie::time::Duration::minutes(120),
+        ));
+
+    let app = axum::Router::new()
+            .route("/foo", get(utils::authenticated))
+            .layer(login_service)
+            .route("/bar", get(utils::maybe_authenticated))
+            .layer(auth_service)
+            .layer(session_layer);
+        
+
+    let server = axum_test::TestServerConfig::builder()
+        .save_cookies()
+        .http_transport_with_ip_port(Some("127.0.0.1".parse().unwrap()), Some(3000))
+        .build_server(app)
+        .unwrap();
+
+    let client = reqwest::ClientBuilder::new()
+        .cookie_store(true)
+        .redirect(reqwest::redirect::Policy::none())
+        .build()
+        .unwrap();
+
+    // GET /bar
+    let response = server.get("/bar").await;
+    response.assert_status(axum_test::http::StatusCode::OK);
+    response.assert_text("Hello anon!");
+
+    // GET /foo
+    let response = server.get("/foo").await;
+    response.assert_status(axum_test::http::StatusCode::TEMPORARY_REDIRECT);
+    let url = utils::extract_location_header_testresponse(response).unwrap();
+
+    // GET keycloak/auth
+    let response = client.get(url).send().await.unwrap();
+    assert_eq!(response.status(), reqwest::StatusCode::OK);
+    let html = response.text().await.unwrap();
+    let url_regex = regex::Regex::new(r#"action="([^"]+)""#).unwrap();
+    let url = url_regex.captures(&html).unwrap().get(1).unwrap().as_str();
+    let params = [("username", "jojo"), ("password", "jopass")];
+
+    // POST keycloak/auth
+    let response = client.post(url).form(&params).send().await.unwrap();
+    assert_eq!(response.status(), reqwest::StatusCode::FOUND);
+    let url = utils::extract_location_header_response(response).unwrap();
+    let url = url.replace("http://localhost:3000", ""); // Remove http://localhost:3000
+
+    // GET /foo-callback
+    let response = server.get(&url).await;
+    response.assert_status(axum_test::http::StatusCode::TEMPORARY_REDIRECT);
+    response.assert_header("Location", "http://localhost:3000/foo");
+
+    // GET /foo
+    let response = server.get("/foo").await;
+    response.assert_status(axum_test::http::StatusCode::OK);
+    response.assert_text(format!("Hello {id}"));
+
+    // GET /bar
+    let response = server.get("/bar").await;
+    response.assert_status(axum_test::http::StatusCode::OK);
+    response.assert_text(format!("Hello {id}! You are already logged in from another Handler."));
+}
diff --git a/tests/keycloak.rs b/tests/keycloak.rs
new file mode 100644
index 0000000..6490748
--- /dev/null
+++ b/tests/keycloak.rs
@@ -0,0 +1,272 @@
+use testcontainers::{
+    core::{CmdWaitFor, ExecCommand, Image, WaitFor},
+    runners::AsyncRunner,
+    ContainerAsync,
+};
+
+#[derive(Debug, Default, Clone)]
+struct KeycloakImage;
+
+const NAME: &str = "quay.io/keycloak/keycloak";
+const TAG: &str = "25.0";
+
+impl Image for KeycloakImage {
+    fn name(&self) -> &str {
+        NAME
+    }
+
+    fn tag(&self) -> &str {
+        TAG
+    }
+
+    fn ready_conditions(&self) -> Vec<WaitFor> {
+        vec![WaitFor::message_on_stdout("Listening on:"),
+        WaitFor::message_on_stdout("Running the server in development mode. DO NOT use this configuration in production.")
+        ]
+    }
+
+    fn env_vars(
+        &self,
+    ) -> impl IntoIterator<
+        Item = (
+            impl Into<std::borrow::Cow<'_, str>>,
+            impl Into<std::borrow::Cow<'_, str>>,
+        ),
+    > {
+        [
+            ("KEYCLOAK_ADMIN", "admin"),
+            ("KEYCLOAK_ADMIN_PASSWORD", "admin"),
+        ]
+    }
+
+    fn cmd(&self) -> impl IntoIterator<Item = impl Into<std::borrow::Cow<'_, str>>> {
+        ["start-dev"]
+    }
+}
+
+pub struct Keycloak {
+    container: ContainerAsync<KeycloakImage>,
+    realms: Vec<Realm>,
+    url: String,
+}
+
+#[derive(Clone)]
+pub struct Realm {
+    pub name: String,
+    pub clients: Vec<Client>,
+    pub users: Vec<User>,
+}
+
+#[derive(Clone)]
+pub struct Client {
+    pub client_id: String,
+    pub client_secret: Option<String>,
+}
+
+impl Default for Client {
+    fn default() -> Self {
+        Self {
+            client_id: "0".to_owned(),
+            client_secret: None,
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct User {
+    pub username: String,
+    pub email: String,
+    pub firstname: String,
+    pub lastname: String,
+    pub password: String,
+}
+
+impl Keycloak {
+    pub async fn start(
+        realms: Vec<Realm>,
+    ) -> Result<Keycloak, Box<dyn std::error::Error + 'static>> {
+        let container = KeycloakImage.start().await?;
+
+        let keycloak = Self {
+            url: format!(
+                "http://localhost:{}",
+                container.get_host_port_ipv4(8080).await?,
+            ),
+            container,
+            realms,
+        };
+
+        keycloak
+            .container
+            .exec(
+                ExecCommand::new([
+                    "/opt/keycloak/bin/kcadm.sh",
+                    "config",
+                    "credentials",
+                    "--server",
+                    "http://localhost:8080",
+                    "--realm",
+                    "master",
+                    "--user",
+                    "admin",
+                    "--password",
+                    "admin",
+                ])
+                .with_cmd_ready_condition(CmdWaitFor::exit_code(0)),
+            )
+            .await
+            .unwrap();
+
+        for realm in keycloak.realms.iter() {
+            if realm.name != "master" {
+                keycloak.create_realm(&realm.name).await;
+            }
+            for client in realm.clients.iter() {
+                keycloak
+                    .create_client(
+                        &client.client_id,
+                        client.client_secret.as_deref(),
+                        &realm.name,
+                    )
+                    .await;
+            }
+            for user in realm.users.iter() {
+                keycloak
+                    .create_user(
+                        &user.username,
+                        &user.email,
+                        &user.firstname,
+                        &user.lastname,
+                        &user.password,
+                        &realm.name,
+                    )
+                    .await;
+            }
+        }
+
+        Ok(keycloak)
+    }
+
+    pub fn url(&self) -> &str {
+        &self.url
+    }
+
+    pub async fn create_realm(&self, name: &str) {
+        self.container
+            .exec(
+                ExecCommand::new([
+                    "/opt/keycloak/bin/kcadm.sh",
+                    "create",
+                    "realms",
+                    "-s",
+                    &format!("realm={name}"),
+                    "-s",
+                    "enabled=true",
+                ])
+                .with_cmd_ready_condition(CmdWaitFor::exit_code(0)),
+            )
+            .await
+            .unwrap();
+    }
+
+    pub async fn create_client(&self, client_id: &str, client_secret: Option<&str>, realm: &str) {
+        if let Some(client_secret) = client_secret {
+            self.container
+                .exec(
+                    ExecCommand::new([
+                        "/opt/keycloak/bin/kcadm.sh",
+                        "create",
+                        "clients",
+                        "-r",
+                        &realm,
+                        "-s",
+                        &format!("clientId={client_id}"),
+                        "-s",
+                        &format!("secret={client_secret}"),
+                        "-s",
+                        "redirectUris=[\"*\"]",
+                    ])
+                    .with_cmd_ready_condition(CmdWaitFor::exit_code(0)),
+                )
+                .await
+                .unwrap();
+        } else {
+            self.container
+                .exec(
+                    ExecCommand::new([
+                        "/opt/keycloak/bin/kcadm.sh",
+                        "create",
+                        "clients",
+                        "-r",
+                        &realm,
+                        "-s",
+                        &format!("clientId={client_id}"),
+                        "-s",
+                        "redirectUris=[\"*\"]",
+                    ])
+                    .with_cmd_ready_condition(CmdWaitFor::exit_code(0)),
+                )
+                .await
+                .unwrap();
+        }
+    }
+
+    pub async fn create_user(
+        &self,
+        username: &str,
+        email: &str,
+        firstname: &str,
+        lastname: &str,
+        password: &str,
+        realm: &str,
+    ) -> String {
+        let stderr = self.container
+            .exec(
+                ExecCommand::new([
+                    "/opt/keycloak/bin/kcadm.sh",
+                    "create",
+                    "users",
+                    "-r",
+                    &realm,
+                    "-s",
+                    &format!("username={username}"),
+                    "-s",
+                    "enabled=true",
+                    "-s",
+                    "emailVerified=true",
+                    "-s",
+                    &format!("email={email}"),
+                    "-s",
+                    &format!("firstName={firstname}"),
+                    "-s",
+                    &format!("lastName={lastname}"),
+                ])
+                .with_cmd_ready_condition(CmdWaitFor::exit_code(0)),
+            )
+            .await
+            .unwrap()
+            .stderr_to_vec()
+            .await.unwrap();
+
+        let stderr = String::from_utf8_lossy(&stderr);
+        let id = stderr.split('\'').nth(1).unwrap().to_string();
+
+        self.container
+            .exec(
+                ExecCommand::new([
+                    "/opt/keycloak/bin/kcadm.sh",
+                    "set-password",
+                    "-r",
+                    &realm,
+                    "--username",
+                    username,
+                    "--new-password",
+                    password,
+                ])
+                .with_cmd_ready_condition(CmdWaitFor::exit_code(0)),
+            )
+            .await
+            .unwrap();
+        id
+    }
+}
diff --git a/tests/utils.rs b/tests/utils.rs
new file mode 100644
index 0000000..75ae578
--- /dev/null
+++ b/tests/utils.rs
@@ -0,0 +1,48 @@
+use axum::response::IntoResponse;
+use axum_oidc::{EmptyAdditionalClaims, OidcClaims};
+
+
+pub async fn authenticated(claims: OidcClaims<EmptyAdditionalClaims>) -> impl IntoResponse {
+    format!("Hello {}", claims.subject().as_str())
+}
+
+pub async fn maybe_authenticated(
+    claims: Option<OidcClaims<EmptyAdditionalClaims>>,
+) -> impl IntoResponse {
+    if let Some(claims) = claims {
+        format!(
+            "Hello {}! You are already logged in from another Handler.",
+            claims.subject().as_str()
+        )
+    } else {
+        "Hello anon!".to_string()
+    }
+}
+
+pub async fn handle_axum_oidc_middleware_error(
+    e: axum_oidc::error::MiddlewareError,
+) -> axum::http::Response<axum::body::Body> {
+    e.into_response()
+}
+
+pub fn extract_location_header_testresponse(response: axum_test::TestResponse) -> Option<String> {
+    Some(
+        response
+            .headers()
+            .get("Location")?
+            .to_str()
+            .ok()?
+            .to_string(),
+    )
+}
+
+pub fn extract_location_header_response(response: reqwest::Response) -> Option<String> {
+    Some(
+        response
+            .headers()
+            .get("Location")?
+            .to_str()
+            .ok()?
+            .to_string(),
+    )
+}