diff --git a/src/lib.rs b/src/lib.rs
index efcede1..0969494 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -257,65 +257,82 @@ pub enum KeyTransformationError {
     ToSEC1 { value: String },
 }
 
-// #[cfg(test)]
-// mod tests {
-//     use std::collections::BTreeMap;
+#[cfg(test)]
+mod tests {
+    use std::collections::BTreeMap;
 
-//     use base64::prelude::*;
-//     use isomdl::{
-//         definitions::device_request::{self, DataElements},
-//         presentation::reader,
-//     };
-//     use p256::ecdsa::signature::{SignatureEncoding, Signer};
+    use base64::prelude::*;
+    use isomdl::{
+        definitions::{
+            device_request::{self, DataElements},
+            x509::trust_anchor::TrustAnchorRegistry,
+        },
+        presentation::reader,
+    };
+    use p256::ecdsa::signature::{SignatureEncoding, Signer};
 
-//     use super::*;
+    use super::*;
 
-//     #[test]
-//     fn end_to_end_ble_presentment() {
-//         let mdoc_b64 = include_str!("../tests/res/mdoc.b64");
-//         let mdoc_bytes = BASE64_STANDARD.decode(mdoc_b64).unwrap();
-//         let mdoc = MDoc::from_cbor(mdoc_bytes).unwrap();
-//         let key: p256::ecdsa::SigningKey =
-//             p256::SecretKey::from_sec1_pem(include_str!("../tests/res/sec1.pem"))
-//                 .unwrap()
-//                 .into();
-//         let session_data = initialise_session(mdoc, Uuid::new_v4()).unwrap();
-//         let namespaces: device_request::Namespaces = [(
-//             "org.iso.18013.5.1".to_string(),
-//             [
-//                 ("given_name".to_string(), true),
-//                 ("family_name".to_string(), false),
-//             ]
-//             .into_iter()
-//             .collect::<BTreeMap<String, bool>>()
-//             .try_into()
-//             .unwrap(),
-//         )]
-//         .into_iter()
-//         .collect::<BTreeMap<String, DataElements>>()
-//         .try_into()
-//         .unwrap();
-//         let (mut reader_session_manager, request, _ble_ident) =
-//             reader::SessionManager::establish_session(session_data.qr_code_uri, namespaces.clone())
-//                 .unwrap();
-//         // let request = reader_session_manager.new_request(namespaces).unwrap();
-//         let request_data = handle_request(session_data.state, request).unwrap();
-//         let permitted_items = [(
-//             "org.iso.18013.5.1.mDL".to_string(),
-//             [(
-//                 "org.iso.18013.5.1".to_string(),
-//                 vec!["given_name".to_string()],
-//             )]
-//             .into_iter()
-//             .collect(),
-//         )]
-//         .into_iter()
-//         .collect();
-//         let signing_payload =
-//             submit_response(request_data.session_manager.clone(), permitted_items).unwrap();
-//         let signature: p256::ecdsa::Signature = key.sign(&signing_payload);
-//         let response =
-//             submit_signature(request_data.session_manager, signature.to_der().to_vec()).unwrap();
-//         reader_session_manager.handle_response(&response).unwrap();
-//     }
-// }
+    #[test]
+    fn end_to_end_ble_presentment() {
+        let mdoc_b64 = include_str!("../tests/res/mdoc.b64");
+        let mdoc_bytes = BASE64_STANDARD.decode(mdoc_b64).unwrap();
+        let mdoc = MDoc::from_cbor(mdoc_bytes).unwrap();
+        let key: p256::ecdsa::SigningKey =
+            p256::SecretKey::from_sec1_pem(include_str!("../tests/res/sec1.pem"))
+                .unwrap()
+                .into();
+        let session_data = initialise_session(mdoc, Uuid::new_v4()).unwrap();
+        let namespaces: device_request::Namespaces = [(
+            "org.iso.18013.5.1".to_string(),
+            [
+                ("given_name".to_string(), true),
+                ("family_name".to_string(), false),
+            ]
+            .into_iter()
+            .collect::<BTreeMap<String, bool>>()
+            .try_into()
+            .unwrap(),
+        )]
+        .into_iter()
+        .collect::<BTreeMap<String, DataElements>>()
+        .try_into()
+        .unwrap();
+        let trust_anchor = TrustAnchorRegistry::iaca_registry_from_str(vec![include_str!(
+            "../tests/res/issuer-cert.pem"
+        )
+        .to_string()])
+        .unwrap();
+        let (mut reader_session_manager, request, _ble_ident) =
+            reader::SessionManager::establish_session(
+                session_data.qr_code_uri,
+                namespaces.clone(),
+                Some(trust_anchor),
+            )
+            .unwrap();
+        // let request = reader_session_manager.new_request(namespaces).unwrap();
+        let request_data = handle_request(session_data.state, request).unwrap();
+        let permitted_items = [(
+            "org.iso.18013.5.1.mDL".to_string(),
+            [(
+                "org.iso.18013.5.1".to_string(),
+                vec!["given_name".to_string()],
+            )]
+            .into_iter()
+            .collect(),
+        )]
+        .into_iter()
+        .collect();
+        let signing_payload =
+            submit_response(request_data.session_manager.clone(), permitted_items).unwrap();
+        let signature: p256::ecdsa::Signature = key.sign(&signing_payload);
+        let response =
+            submit_signature(request_data.session_manager, signature.to_der().to_vec()).unwrap();
+        // Root cert is expired
+        let mut errors = reader_session_manager.handle_response(&response).errors;
+        let (k, v) = errors.pop_first().unwrap();
+        assert_eq!(k, "certificate_errors");
+        assert_eq!(v.as_array().unwrap().len(), 1);
+        assert_eq!(errors, BTreeMap::default());
+    }
+}
diff --git a/tests/res/issuer-cert.pem b/tests/res/issuer-cert.pem
new file mode 100644
index 0000000..5e4c680
--- /dev/null
+++ b/tests/res/issuer-cert.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----