diff --git a/crates/threshold-signature-server/src/user/tests.rs b/crates/threshold-signature-server/src/user/tests.rs
index f564932b6..9896fcabd 100644
--- a/crates/threshold-signature-server/src/user/tests.rs
+++ b/crates/threshold-signature-server/src/user/tests.rs
@@ -18,7 +18,7 @@ use base64::prelude::{Engine, BASE64_STANDARD};
 use bip39::{Language, Mnemonic};
 use blake3::hash;
 use entropy_client::{
-    client::{sign, store_program, update_programs},
+    client::{register, sign, store_program, update_programs},
     user::get_signers_from_chain,
 };
 use entropy_kvdb::{
@@ -1561,6 +1561,81 @@ async fn test_new_registration_flow() {
 
     clean_tests();
 }
+
+#[tokio::test]
+#[serial]
+async fn test_client_register_and_sign() {
+    clean_tests();
+    let account_owner = AccountKeyring::Ferdie.pair();
+    let signature_request_author = AccountKeyring::One;
+
+    let add_parent_key = true;
+    let (_validator_ips, _validator_ids) = spawn_testing_validators(add_parent_key).await;
+
+    let force_authoring = true;
+    let substrate_context = test_node_process_testing_state(force_authoring).await;
+    let api = get_api(&substrate_context.ws_url).await.unwrap();
+    let rpc = get_rpc(&substrate_context.ws_url).await.unwrap();
+
+    // Jumpstart the network
+    jump_start_network(&api, &rpc).await;
+
+    // Store a program
+    let program_pointer = store_program(
+        &api,
+        &rpc,
+        &account_owner,
+        TEST_PROGRAM_WASM_BYTECODE.to_owned(),
+        vec![],
+        vec![],
+        vec![],
+    )
+    .await
+    .unwrap();
+
+    // Register, using that program
+    let (verifying_key, _registered_info) = {
+        let register_on_chain = true;
+        let mut registrations = register(
+            &api,
+            &rpc,
+            account_owner.clone(),
+            subxtAccountId32(account_owner.public().0),
+            BoundedVec(vec![ProgramInstance { program_pointer, program_config: vec![] }]),
+            register_on_chain,
+        )
+        .await
+        .unwrap();
+
+        registrations.pop().unwrap()
+    };
+
+    // Sign a message
+    let recoverable_signature = sign(
+        &api,
+        &rpc,
+        signature_request_author.pair(),
+        verifying_key,
+        PREIMAGE_SHOULD_SUCCEED.to_vec(),
+        Some(AUXILARY_DATA_SHOULD_SUCCEED.to_vec()),
+    )
+    .await
+    .unwrap();
+
+    // Check the signature
+    let message_should_succeed_hash = Hasher::keccak(PREIMAGE_SHOULD_SUCCEED);
+    let recovery_key_from_sig = VerifyingKey::recover_from_prehash(
+        &message_should_succeed_hash,
+        &recoverable_signature.signature,
+        recoverable_signature.recovery_id,
+    )
+    .unwrap();
+    assert_eq!(
+        verifying_key.to_vec(),
+        recovery_key_from_sig.to_encoded_point(true).to_bytes().to_vec()
+    );
+}
+
 #[tokio::test]
 #[serial]
 async fn test_mutiple_confirm_done() {