diff --git a/.github/workflows/flask.yml b/.github/workflows/flask.yml
index 43fbe8e7..0c801216 100644
--- a/.github/workflows/flask.yml
+++ b/.github/workflows/flask.yml
@@ -47,7 +47,7 @@ jobs:
         sudo apt-get update -qy
         sudo apt-get -y install postgresql-client --no-install-recommends
         python -m pip install --upgrade pip
-        pip install flake8 pytest coverage
+        pip install -r requirements-dev.txt
         pip install -r requirements.txt
 
     - name: Prepare database
diff --git a/.github/workflows/selenium.yml b/.github/workflows/selenium.yml
index f9209484..fab0faab 100644
--- a/.github/workflows/selenium.yml
+++ b/.github/workflows/selenium.yml
@@ -47,7 +47,7 @@ jobs:
         sudo apt-get update -qy
         sudo apt-get -y install postgresql-client --no-install-recommends
         python -m pip install --upgrade pip
-        pip install flake8 pytest coverage
+        pip install -r requirements-dev.txt
         pip install -r requirements.txt
         pip install -e .
         mkdir bin
diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 65d2b5c3..7bf53d4f 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -335,6 +335,7 @@ class NewDeviceForm(FlaskForm):
     screen = FloatField('Screen size', [validators.Optional()])
 
     def __init__(self, *args, **kwargs):
+        self.objs = set()
         self._obj = kwargs.pop('_obj', None)
         super().__init__(*args, **kwargs)
         if self._obj:
@@ -545,6 +546,7 @@ class NewDeviceForm(FlaskForm):
             type="New device", source='Web form', placeholder=device.placeholder
         )
         db.session.add(placeholder_log)
+        self.objs.add(device)
 
     def reset_ids(self):
         if self.amount.data > 1:
diff --git a/ereuse_devicehub/inventory/views.py b/ereuse_devicehub/inventory/views.py
index 52a1a04a..8749bf8e 100644
--- a/ereuse_devicehub/inventory/views.py
+++ b/ereuse_devicehub/inventory/views.py
@@ -257,14 +257,16 @@ class DeviceCreateView(GenericMixin):
             }
         )
         if form.validate_on_submit():
-            snapshot = form.save(commit=False)
+            form.save(commit=False)
             next_url = url_for('inventory.devicelist')
             if lot_id:
                 next_url = url_for('inventory.lotdevicelist', lot_id=lot_id)
-                lots = self.context['lots']
-                lot = lots.filter(Lot.id == lot_id).one()
-                lot.devices.add(snapshot.device)
-                db.session.add(lot)
+                if form.objs:
+                    lots = self.context['lots']
+                    lot = lots.filter(Lot.id == lot_id).one()
+                    lot.devices = lot.devices.union(form.objs)
+                else:
+                    messages.error('Sorry, the device could not be created')
 
             db.session.commit()
             messages.success('Device "{}" created successfully!'.format(form.type.data))
diff --git a/examples/app.py b/examples/app.py
index 3a6a25a6..47671ec9 100644
--- a/examples/app.py
+++ b/examples/app.py
@@ -3,11 +3,8 @@ Example app with minimal configuration.
 
 Use this as a starting point.
 """
-import sentry_sdk
-from decouple import config
 
-# from flask_wtf.csrf import CSRFProtect
-from sentry_sdk.integrations.flask import FlaskIntegration
+from decouple import config
 
 from ereuse_devicehub.api.views import api
 from ereuse_devicehub.config import DevicehubConfig
@@ -17,11 +14,17 @@ from ereuse_devicehub.labels.views import labels
 from ereuse_devicehub.views import core
 from ereuse_devicehub.workbench.views import workbench
 
+# from flask_wtf.csrf import CSRFProtect
+
+
 # from werkzeug.contrib.profiler import ProfilerMiddleware
 
 
 SENTRY_DSN = config('SENTRY_DSN', None)
 if SENTRY_DSN:
+    import sentry_sdk
+    from sentry_sdk.integrations.flask import FlaskIntegration
+
     sentry_sdk.init(
         dsn=SENTRY_DSN,
         integrations=[
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 02778f7d..c7110e32 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,7 @@
 black
+coverage
 isort
 flake8
 pre-commit
+pytest
+selenium==4.1.5
diff --git a/requirements-prod.txt b/requirements-prod.txt
new file mode 100644
index 00000000..50a04d5d
--- /dev/null
+++ b/requirements-prod.txt
@@ -0,0 +1,2 @@
+sentry_sdk==1.6.0
+blinker==1.4
diff --git a/requirements.txt b/requirements.txt
index 91d7e79a..8ec1e0a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,15 +42,12 @@ sortedcontainers==2.1.0
 tqdm==4.32.2
 python-decouple==3.3
 python-dotenv==0.14.0
-selenium==4.1.5
 pyjwt==2.4.0
 pint==0.9
 py-dmidecode==0.1.0
 pandas==1.3.5
-numpy==1.21.6
-odfpy==1.4.1
-xlrd==2.0.1
-openpyxl==3.0.10
-et_xmlfile==1.1.0
-sentry_sdk==1.6.0
-blinker==1.4
+numpy==1.22.0   # pandas dependency
+odfpy==1.4.1   # pandas dependency
+xlrd==2.0.1   # pandas dependency
+openpyxl==3.0.10   # pandas dependency
+et_xmlfile==1.1.0   # pandas dependency
diff --git a/tests/test_render_2_0.py b/tests/test_render_2_0.py
index 96415935..944995e6 100644
--- a/tests/test_render_2_0.py
+++ b/tests/test_render_2_0.py
@@ -1938,3 +1938,76 @@ def test_placeholder_log_excel_update(user3: UserClientFlask):
     assert "Excel" in body
     assert "placeholder_test.xls" in body
     assert "placeholder_test.csv" in body
+
+
+@pytest.mark.mvp
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_add_placeholder_excel_from_lot(user3: UserClientFlask):
+    user3.get('/inventory/lot/add/')
+    lot_name = 'lot1'
+    data = {
+        'name': lot_name,
+        'csrf_token': generate_csrf(),
+    }
+    user3.post('/inventory/lot/add/', data=data)
+    lot = Lot.query.filter_by(name=lot_name).one()
+    lot_id = lot.id
+
+    uri = f'/inventory/lot/{lot_id}/upload-placeholder/'
+    body, status = user3.get(uri)
+    assert status == '200 OK'
+    assert "Upload Placeholder" in body
+
+    file_path = Path(__file__).parent.joinpath('files').joinpath('placeholder_test.xls')
+    with open(file_path, 'rb') as excel:
+        data = {
+            'csrf_token': generate_csrf(),
+            'type': "Laptop",
+            'placeholder_file': excel,
+        }
+        user3.post(uri, data=data, content_type="multipart/form-data")
+    assert Device.query.count() == 3
+    dev = Device.query.first()
+    assert dev.hid == 'laptop-sony-vaio-12345678'
+    assert dev.placeholder.phid == 'a123'
+    assert dev.placeholder.info == 'Good conditions'
+    assert dev.placeholder.pallet == '24A'
+    assert dev.placeholder.id_device_supplier == 'TTT'
+    assert len(lot.devices) == 3
+
+
+@pytest.mark.mvp
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_add_new_placeholder_from_lot(user3: UserClientFlask):
+    user3.get('/inventory/lot/add/')
+    lot_name = 'lot1'
+    data = {
+        'name': lot_name,
+        'csrf_token': generate_csrf(),
+    }
+    user3.post('/inventory/lot/add/', data=data)
+    lot = Lot.query.filter_by(name=lot_name).one()
+    assert len(lot.devices) == 0
+    lot_id = lot.id
+
+    uri = f'/inventory/lot/{lot_id}/device/add/'
+
+    user3.get(uri)
+    data = {
+        'csrf_token': generate_csrf(),
+        'type': "Laptop",
+        'phid': 'ace',
+        'serial_number': "AAAAB",
+        'model': "LC27T55",
+        'manufacturer': "Samsung",
+        'generation': 1,
+        'weight': 0.1,
+        'height': 0.1,
+        'depth': 0.1,
+        'id_device_supplier': "b2",
+    }
+    user3.post(uri, data=data)
+    dev = Device.query.one()
+    assert dev.hid == 'laptop-samsung-lc27t55-aaaab'
+    assert dev.placeholder.phid == 'ace'
+    assert len(lot.devices) == 1