diff --git a/pallets/duniter-wot/src/mock.rs b/pallets/duniter-wot/src/mock.rs
index 6a0c12c1c8af715dd298872e5b798dc6119976b9..b32f0b46b7e1c36b27ce7ac04c131f6aa55a6a8e 100644
--- a/pallets/duniter-wot/src/mock.rs
+++ b/pallets/duniter-wot/src/mock.rs
@@ -122,7 +122,7 @@ impl pallet_identity::Config for Test {
     type ChangeOwnerKeyPeriod = ChangeOwnerKeyPeriod;
     type ConfirmPeriod = ConfirmPeriod;
     type Event = Event;
-    type EnsureIdtyCallAllowed = DuniterWot;
+    type EnsureIdtyCallAllowed = (DuniterWot, SmithsSubWot);
     type IdtyCreationPeriod = IdtyCreationPeriod;
     type IdtyData = ();
     type IdtyNameValidator = IdtyNameValidatorTestImpl;
diff --git a/pallets/duniter-wot/src/tests.rs b/pallets/duniter-wot/src/tests.rs
index 3cb3da2b9eabd3426e6a4100525c4ef4648ff380..8ff6dddba8d378b8bdfa0b7adcb9e94e833aa70e 100644
--- a/pallets/duniter-wot/src/tests.rs
+++ b/pallets/duniter-wot/src/tests.rs
@@ -16,11 +16,12 @@
 
 use crate::mock::*;
 use crate::mock::{Identity, System};
-use frame_support::assert_noop;
-use frame_support::assert_ok;
+use codec::Encode;
 use frame_support::instances::Instance1;
+use frame_support::{assert_noop, assert_ok};
 use frame_system::{EventRecord, Phase};
-use pallet_identity::{IdtyName, IdtyStatus};
+use pallet_identity::{IdtyName, IdtyStatus, NewOwnerKeyPayload, NEW_OWNER_KEY_PAYLOAD_PREFIX};
+use sp_runtime::testing::TestSignature;
 
 #[test]
 fn test_genesis_build() {
@@ -92,6 +93,30 @@ fn test_smith_certs_expirations_should_revoke_smith_membership() {
     });
 }
 
+#[test]
+fn test_smith_member_cant_change_idty_address() {
+    new_test_ext(5, 3).execute_with(|| {
+        run_to_block(2);
+
+        let genesis_hash = System::block_hash(0);
+        let new_key_payload = NewOwnerKeyPayload {
+            genesis_hash: &genesis_hash,
+            idty_index: 3u32,
+            old_owner_key: &3u64,
+        };
+
+        // Identity 3 can't change it's address
+        assert_noop!(
+            Identity::change_owner_key(
+                Origin::signed(3),
+                13,
+                TestSignature(13, (NEW_OWNER_KEY_PAYLOAD_PREFIX, new_key_payload).encode())
+            ),
+            pallet_identity::Error::<Test>::NotAllowedToChangeIdtyAddress
+        );
+    });
+}
+
 #[test]
 fn test_revoke_smiths_them_rejoin() {
     new_test_ext(5, 4).execute_with(|| {