diff --git a/tests/test_merge.py b/tests/test_merge.py
index 39cce912..bc408f68 100644
--- a/tests/test_merge.py
+++ b/tests/test_merge.py
@@ -4,15 +4,18 @@ from flask import g
 
 import pytest
 from ereuse_devicehub.client import Client, UserClient
+from ereuse_devicehub.db import db
 from ereuse_devicehub.devicehub import Devicehub
 from ereuse_devicehub.resources.action import models as m
 from ereuse_devicehub.resources.device import models as d
+from ereuse_devicehub.resources.tag import Tag
 from tests import conftest
 from tests.conftest import file as import_snap
 
 
 @pytest.mark.mvp
 def test_simple_merge(app: Devicehub, user: UserClient):
+    """ Check if is correct to do a manual merge """
     snapshot1, _ = user.post(import_snap('real-custom.snapshot.11'), res=m.Snapshot)
     snapshot2, _ = user.post(import_snap('real-hp.snapshot.11'), res=m.Snapshot)
     pc1_id = snapshot1['device']['id']
@@ -27,10 +30,16 @@ def test_simple_merge(app: Devicehub, user: UserClient):
         action2 = pc2.actions[0]
         assert not action2 in pc1.actions
 
+        tag = Tag(id='foo-bar', owner_id=user.user['id'])
+        pc2.tags.add(tag)
+        db.session.add(pc2)
+        db.session.commit()
+
         components1 = [com for com in pc1.components]
         components2 = [com for com in pc2.components]
         components1_excluded = [com for com in pc1.components if not com in components2]
         assert pc1.hid != pc2.hid
+        assert not tag in pc1.tags
 
         uri = '/devices/%d/merge/%d' % (pc1_id, pc2_id)
         result, _ = user.post({'id': 1}, uri=uri, status=201)
@@ -40,6 +49,8 @@ def test_simple_merge(app: Devicehub, user: UserClient):
         assert action2 in pc1.actions
         assert len(pc1.actions) == n_actions1 + n_actions2
         assert set(pc2.components) == set()
+        assert tag in pc1.tags
+        assert not tag in pc2.tags
 
         for com in components2:
             assert com in pc1.components