diff --git a/ereuse_devicehub/resources/device/views.py b/ereuse_devicehub/resources/device/views.py
index 61993ab0..2c143517 100644
--- a/ereuse_devicehub/resources/device/views.py
+++ b/ereuse_devicehub/resources/device/views.py
@@ -50,7 +50,8 @@ class Filters(query.Query):
     _device_inside_lot = (Device.id == LotDevice.device_id) & (Lot.id == LotDevice.lot_id)
     _component_inside_lot_through_parent = (Device.id == Component.id) \
                                            & (Component.parent_id == _parent.id) \
-                                           & (_parent.id == LotDevice.device_id)
+                                           & (_parent.id == LotDevice.device_id) \
+                                           & (Lot.id == LotDevice.lot_id)
 
     type = query.Or(OfType(Device.type))
     model = query.ILike(Device.model)
diff --git a/ereuse_devicehub/resources/device/x.py b/ereuse_devicehub/resources/device/x.py
deleted file mode 100644
index e2d203a3..00000000
--- a/ereuse_devicehub/resources/device/x.py
+++ /dev/null
@@ -1,8 +0,0 @@
-import csv
-import json
-
-with open('manufacturers.csv', 'w') as o:
-    writer = csv.writer(o)
-    with open('manufacturers.json') as i:
-        for x in json.load(i):
-            writer.writerow([x['name'], x['url'], x['logo'] if x.get('logo', None) else None])
diff --git a/ereuse_devicehub/resources/lot/views.py b/ereuse_devicehub/resources/lot/views.py
index 454dcdd5..9b2707dc 100644
--- a/ereuse_devicehub/resources/lot/views.py
+++ b/ereuse_devicehub/resources/lot/views.py
@@ -59,12 +59,8 @@ class LotView(View):
         you can filter.
         """
         if args['format'] == LotFormat.UiTree:
-            nodes = []
-            for model in Path.query:  # type: Path
-                path = deque(model.path.path.split('.'))
-                self._p(nodes, path)
             return jsonify({
-                'items': nodes,
+                'items': self.ui_tree(),
                 'url': request.path
             })
         else:
@@ -85,7 +81,16 @@ class LotView(View):
             }
             return jsonify(ret)
 
-    def _p(self, nodes: List[dict], path: deque):
+    @classmethod
+    def ui_tree(cls) -> List[dict]:
+        nodes = []
+        for model in Path.query:  # type: Path
+            path = deque(model.path.path.split('.'))
+            cls._p(nodes, path)
+        return nodes
+
+    @classmethod
+    def _p(cls, nodes: List[dict], path: deque):
         """Recursively creates the nested lot structure.
 
         Every recursive step consumes path (a deque of lot_id),
@@ -109,7 +114,7 @@ class LotView(View):
             }
             nodes.append(node)
         if path:
-            self._p(node['nodes'], path)
+            cls._p(node['nodes'], path)
 
 
 class LotBaseChildrenView(View):
diff --git a/tests/conftest.py b/tests/conftest.py
index 17ba7756..5fdfe479 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -104,7 +104,7 @@ def auth_app_context(app: Devicehub):
             password = ''
 
         app.auth.perform_auth(Auth())
-        yield
+        yield app
 
 
 def file(name: str) -> dict:
diff --git a/tests/test_device.py b/tests/test_device.py
index e7608fa5..475a7f05 100644
--- a/tests/test_device.py
+++ b/tests/test_device.py
@@ -510,3 +510,10 @@ def test_device_public(user: UserClient, client: Client):
     html, _ = client.get(res=Device, item=s['device']['id'], accept=ANY)
     assert 'intel atom cpu n270 @ 1.60ghz' in html
     assert 'S/N 00:24:8c:7f:cf:2d – 100 Mbps' in html
+
+
+@pytest.mark.xfail(reason='Functionality not yet developed.')
+def test_device_search_multiple_tags(user: UserClient):
+    """Ensures that users can search multiple tags at once
+    and get their multiple devices."""
+    pass
diff --git a/tests/test_device_find.py b/tests/test_device_find.py
index 71a49c2b..484957ae 100644
--- a/tests/test_device_find.py
+++ b/tests/test_device_find.py
@@ -4,7 +4,8 @@ from teal.utils import compiled
 from ereuse_devicehub.client import UserClient
 from ereuse_devicehub.db import db
 from ereuse_devicehub.devicehub import Devicehub
-from ereuse_devicehub.resources.device.models import Desktop, Device, Laptop, SolidStateDrive
+from ereuse_devicehub.resources.device.models import Desktop, Device, Laptop, Processor, \
+    SolidStateDrive
 from ereuse_devicehub.resources.device.views import Filters, Sorting
 from ereuse_devicehub.resources.enums import ComputerChassis
 from ereuse_devicehub.resources.event.models import Snapshot
@@ -73,6 +74,8 @@ def device_query_dummy(app: Devicehub):
         devices[-1].parent = devices[0]  # s4 in s1
         db.session.add_all(devices)
 
+        devices[0].components.add(Processor(model='ml5', manufacturer='mr5'))
+
         db.session.commit()
 
 
@@ -80,7 +83,7 @@ def device_query_dummy(app: Devicehub):
 def test_device_query_no_filters(user: UserClient):
     i, _ = user.get(res=Device)
     assert tuple(d['type'] for d in i['items']) == (
-        'Desktop', 'Laptop', 'Desktop', 'SolidStateDrive'
+        'Desktop', 'Laptop', 'Desktop', 'SolidStateDrive', 'Processor'
     )
 
 
@@ -103,6 +106,12 @@ def test_device_query_filter_sort(user: UserClient):
 def test_device_query_filter_lots(user: UserClient):
     parent, _ = user.post({'name': 'Parent'}, res=Lot)
     child, _ = user.post({'name': 'Child'}, res=Lot)
+
+    i, _ = user.get(res=Device, query=[
+        ('filter', {'lot': {'id': [parent['id']]}})
+    ])
+    assert len(i['items']) == 0, 'No devices in lot'
+
     parent, _ = user.post({},
                           res=Lot,
                           item='{}/children'.format(parent['id']),
@@ -122,13 +131,19 @@ def test_device_query_filter_lots(user: UserClient):
         ('filter', {'lot': {'id': [parent['id']]}}),
         ('sort', {'id': Sorting.ASCENDING})
     ])
-    assert len(i['items']) == 4
-    assert tuple(x['id'] for x in i['items']) == (1, 2, 3, 4), \
+    assert tuple(x['id'] for x in i['items']) == (1, 2, 3, 4, 5), \
         'The parent lot contains 2 items plus indirectly the third one, and 1st device the HDD.'
 
+    i, _ = user.get(res=Device, query=[
+        ('filter', {'type': ['Computer'], 'lot': {'id': [parent['id']]}}),
+        ('sort', {'id': Sorting.ASCENDING})
+    ])
+    assert tuple(x['id'] for x in i['items']) == (1, 2, 3)
+
     s, _ = user.get(res=Device, query=[
         ('filter', {'lot': {'id': [child['id']]}})
     ])
+    assert len(s['items']) == 1
     assert s['items'][0]['chassis'] == 'Microtower', 'The child lot only contains the last device.'
     s, _ = user.get(res=Device, query=[
         ('filter', {'lot': {'id': [child['id'], parent['id']]}})
@@ -139,7 +154,6 @@ def test_device_query_filter_lots(user: UserClient):
         ('filter', {'lot': {'id': [parent['id']]}, 'type': ['Computer']}),
         ('sort', {'id': Sorting.ASCENDING})
     ])
-    assert len(i['items']) == 3
     assert tuple(x['id'] for x in i['items']) == (1, 2, 3), 'Only computers now'
 
 
diff --git a/tests/test_lot.py b/tests/test_lot.py
index ccd76f4a..372330dc 100644
--- a/tests/test_lot.py
+++ b/tests/test_lot.py
@@ -81,8 +81,7 @@ def test_add_edge():
     assert child in grandparent
 
 
-@pytest.mark.usefixtures(conftest.auth_app_context.__name__)
-def test_lot_multiple_parents():
+def test_lot_multiple_parents(auth_app_context):
     """Tests creating a lot with two parent lots:
 
     grandparent1 grandparent2
@@ -108,6 +107,18 @@ def test_lot_multiple_parents():
     assert child in grandparent1
     assert child in grandparent2
 
+    nodes = auth_app_context.resources[Lot.t].VIEW.ui_tree()
+    assert nodes[0]['name'] == 'grandparent1'
+    assert nodes[0]['nodes'][0]['name'] == 'parent'
+    assert nodes[0]['nodes'][0]['nodes'][0]['name'] == 'child'
+    assert nodes[0]['nodes'][0]['nodes'][0]['nodes'] == []
+    assert nodes[1]['name'] == 'grandparent2'
+    assert nodes[1]['nodes'][0]['name'] == 'parent'
+    assert nodes[1]['nodes'][0]['nodes'][0]['name'] == 'child'
+    assert nodes[1]['nodes'][0]['nodes'][0]['nodes'] == []
+
+    # Now remove all childs
+
     grandparent1.remove_child(parent)
     assert parent not in grandparent1
     assert child in parent
@@ -115,6 +126,14 @@ def test_lot_multiple_parents():
     assert child not in grandparent1
     assert child in grandparent2
 
+    nodes = auth_app_context.resources[Lot.t].VIEW.ui_tree()
+    assert nodes[0]['name'] == 'grandparent1'
+    assert nodes[0]['nodes'] == []
+    assert nodes[1]['name'] == 'grandparent2'
+    assert nodes[1]['nodes'][0]['name'] == 'parent'
+    assert nodes[1]['nodes'][0]['nodes'][0]['name'] == 'child'
+    assert nodes[1]['nodes'][0]['nodes'][0]['nodes'] == []
+
     grandparent2.remove_child(parent)
     assert parent not in grandparent2
     assert parent not in grandparent1
@@ -122,11 +141,30 @@ def test_lot_multiple_parents():
     assert child not in grandparent1
     assert child in parent
 
+    nodes = auth_app_context.resources[Lot.t].VIEW.ui_tree()
+    assert nodes[0]['name'] == 'grandparent1'
+    assert nodes[0]['nodes'] == []
+    assert nodes[1]['name'] == 'grandparent2'
+    assert nodes[1]['nodes'] == []
+    assert nodes[2]['name'] == 'parent'
+    assert nodes[2]['nodes'][0]['name'] == 'child'
+    assert nodes[2]['nodes'][0]['nodes'] == []
+
     parent.remove_child(child)
     assert child not in parent
     assert len(child.paths) == 1
     assert len(parent.paths) == 1
 
+    nodes = auth_app_context.resources[Lot.t].VIEW.ui_tree()
+    assert nodes[0]['name'] == 'grandparent1'
+    assert nodes[0]['nodes'] == []
+    assert nodes[1]['name'] == 'grandparent2'
+    assert nodes[1]['nodes'] == []
+    assert nodes[2]['name'] == 'parent'
+    assert nodes[2]['nodes'] == []
+    assert nodes[3]['name'] == 'child'
+    assert nodes[3]['nodes'] == []
+
 
 @pytest.mark.usefixtures(conftest.auth_app_context.__name__)
 def test_lot_unite_graphs_and_find():