diff --git a/tests/omni_lock_rust/tests/test_multisig.rs b/tests/omni_lock_rust/tests/test_multisig.rs
index 129eb65..af60e3b 100644
--- a/tests/omni_lock_rust/tests/test_multisig.rs
+++ b/tests/omni_lock_rust/tests/test_multisig.rs
@@ -214,3 +214,66 @@ fn test_multisig_0_2_3_unlock_smt_in_input() {
     let verify_result = verifier.verify(MAX_CYCLES);
     verify_result.expect("pass verification");
 }
+
+#[test]
+fn test_cobuild_multisig_0_2_3_unlock() {
+    let mut data_loader = DummyDataLoader::new();
+
+    let mut config = TestConfig::new(IDENTITY_FLAGS_MULTISIG, true);
+    config.cobuild_enabled = true;
+    config.set_multisig(0, 2, 3);
+
+    config.scheme = TestScheme::OnWhiteList;
+
+    let tx = gen_tx(&mut data_loader, &mut config);
+    let tx = sign_tx(&mut data_loader, tx, &mut config);
+    let resolved_tx = build_resolved_tx(&data_loader, &tx);
+
+    let mut verifier = verify_tx(resolved_tx, data_loader);
+
+    verifier.set_debug_printer(debug_printer);
+    let verify_result = verifier.verify(MAX_CYCLES);
+    verify_result.expect("pass verification");
+}
+
+#[test]
+fn test_cobuild_multisig_invalid_flags() {
+    let mut data_loader = DummyDataLoader::new();
+
+    let mut config = TestConfig::new(IDENTITY_FLAGS_MULTISIG, true);
+    config.set_multisig(0, 2, 3);
+    config.multisig.set(0, 2, 4);
+    config.cobuild_enabled = true;
+
+    config.scheme = TestScheme::OnWhiteList;
+
+    let tx = gen_tx(&mut data_loader, &mut config);
+    let tx = sign_tx(&mut data_loader, tx, &mut config);
+    let resolved_tx = build_resolved_tx(&data_loader, &tx);
+
+    let mut verifier = verify_tx(resolved_tx, data_loader);
+    verifier.set_debug_printer(debug_printer);
+    let verify_result = verifier.verify(MAX_CYCLES);
+    assert_script_error(verify_result.unwrap_err(), ERROR_MULTSIG_SCRIPT_HASH)
+}
+
+#[test]
+fn test_cobuild_multisig_invalid_flags2() {
+    let mut data_loader = DummyDataLoader::new();
+
+    let mut config = TestConfig::new(IDENTITY_FLAGS_MULTISIG, true);
+    config.set_multisig(0, 2, 3);
+    config.multisig.set(0, 3, 3);
+    config.cobuild_enabled = true;
+
+    config.scheme = TestScheme::OnWhiteList;
+
+    let tx = gen_tx(&mut data_loader, &mut config);
+    let tx = sign_tx(&mut data_loader, tx, &mut config);
+    let resolved_tx = build_resolved_tx(&data_loader, &tx);
+
+    let mut verifier = verify_tx(resolved_tx, data_loader);
+    verifier.set_debug_printer(debug_printer);
+    let verify_result = verifier.verify(MAX_CYCLES);
+    assert_script_error(verify_result.unwrap_err(), ERROR_MULTSIG_SCRIPT_HASH)
+}