diff --git a/deltachat-rpc-client/tests/test_securejoin.py b/deltachat-rpc-client/tests/test_securejoin.py
index da7b6090e..effb3149a 100644
--- a/deltachat-rpc-client/tests/test_securejoin.py
+++ b/deltachat-rpc-client/tests/test_securejoin.py
@@ -61,9 +61,16 @@ def test_qr_setup_contact_svg(acfactory) -> None:
 
 
 @pytest.mark.parametrize("protect", [True, False])
-def test_qr_securejoin(acfactory, protect):
+def test_qr_securejoin(acfactory, protect, tmp_path):
     alice, bob = acfactory.get_online_accounts(2)
 
+    # Setup second device for Alice
+    # to test observing securejoin protocol.
+    alice.export_backup(tmp_path)
+    files = list(tmp_path.glob("*.tar"))
+    alice2 = acfactory.get_unconfigured_account()
+    alice2.import_backup(files[0])
+
     logging.info("Alice creates a verified group")
     alice_chat = alice.create_group("Verified group", protect=protect)
     assert alice_chat.get_basic_snapshot().is_protected == protect
@@ -97,6 +104,14 @@ def test_qr_securejoin(acfactory, protect):
     bob_contact_alice_snapshot = bob_contact_alice.get_snapshot()
     assert bob_contact_alice_snapshot.is_verified
 
+    # Start second Alice device.
+    # Alice observes securejoin protocol and verifies Bob on second device.
+    alice2.start_io()
+    alice2.wait_for_securejoin_inviter_success()
+    alice2_contact_bob = alice2.get_contact_by_addr(bob.get_config("addr"))
+    alice2_contact_bob_snapshot = alice2_contact_bob.get_snapshot()
+    assert alice2_contact_bob_snapshot.is_verified
+
 
 def test_qr_securejoin_contact_request(acfactory) -> None:
     """Alice invites Bob to a group when Bob's chat with Alice is in a contact request mode."""
diff --git a/src/securejoin.rs b/src/securejoin.rs
index fdd393e69..42d0525be 100644
--- a/src/securejoin.rs
+++ b/src/securejoin.rs
@@ -637,6 +637,10 @@ pub(crate) async fn observe_securejoin_on_other_device(
         return Ok(HandshakeMessage::Ignore);
     };
     peerstate.set_verified(key.clone(), fingerprint, addr)?;
+    if matches!(step, "vg-member-added" | "vc-contact-confirm") {
+        peerstate.backward_verified_key_id =
+            Some(context.get_config_i64(Config::KeyId).await?).filter(|&id| id > 0);
+    }
     peerstate.prefer_encrypt = EncryptPreference::Mutual;
     peerstate.save_to_db(&context.sql).await?;