diff --git a/tests/scenario_stock_lot_assign_try.rst b/tests/scenario_stock_lot_assign_try.rst
new file mode 100644
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+++ b/tests/scenario_stock_lot_assign_try.rst
@@ -0,0 +1,123 @@
+=================================
+Stock Lot Assign Request Scenario
+=================================
+
+Imports::
+
+    >>> import datetime
+    >>> from dateutil.relativedelta import relativedelta
+    >>> from decimal import Decimal
+
+    >>> from proteus import config, Model, Wizard
+    >>> from trytond.tests.tools import activate_modules
+    >>> from trytond.modules.company.tests.tools import (
+    ...     create_company, get_company)
+    >>> today = datetime.date.today()
+
+Activate modules::
+
+    >>> config = activate_modules('stock_lot')
+    >>> Inventory = Model.get('stock.inventory')
+    >>> Location = Model.get('stock.location')
+    >>> Lot = Model.get('stock.lot')
+    >>> Party = Model.get('party.party')
+    >>> ProductTemplate = Model.get('product.template')
+    >>> ProductUom = Model.get('product.uom')
+    >>> ShipmentOut = Model.get('stock.shipment.out')
+
+Create company::
+
+    >>> _ = create_company()
+    >>> company = get_company()
+
+Create customer::
+
+    >>> customer = Party(name='Customer')
+    >>> customer.save()
+
+Create product::
+
+    >>> unit, = ProductUom.find([('name', '=', 'Unit')])
+
+    >>> template = ProductTemplate()
+    >>> template.name = 'Product'
+    >>> template.default_uom = unit
+    >>> template.type = 'goods'
+    >>> template.list_price = Decimal('20')
+    >>> template.save()
+    >>> product, = template.products
+
+Create lot::
+
+    >>> lot = Lot()
+    >>> lot.number = 'LOT'
+    >>> lot.product = product
+    >>> lot.save()
+
+Get stock locations::
+
+    >>> warehouse_loc, = Location.find([('code', '=', 'WH')])
+    >>> supplier_loc, = Location.find([('code', '=', 'SUP')])
+    >>> customer_loc, = Location.find([('code', '=', 'CUS')])
+    >>> output_loc, = Location.find([('code', '=', 'OUT')])
+    >>> storage_loc, = Location.find([('code', '=', 'STO')])
+    >>> zone1 = Location(name='Zone1')
+    >>> zone1.parent = storage_loc
+    >>> zone1.type = 'storage'
+    >>> zone1.save()
+    >>> zone2, = zone1.duplicate(default={'name': 'Zone2'})
+
+Add product quantities on zones storage locations::
+
+    >>> inventory = Inventory()
+    >>> inventory.location = zone1
+    >>> inventory_line = inventory.lines.new(product=product)
+    >>> inventory_line.quantity = 100.0
+    >>> inventory_line.expected_quantity = 0.0
+    >>> inventory.click('confirm')
+    >>> inventory.state
+    'done'
+    >>> inventory = Inventory()
+    >>> inventory.location = zone2
+    >>> inventory_line = inventory.lines.new()
+    >>> inventory_line.product = product
+    >>> inventory_line.lot = lot
+    >>> inventory_line.quantity = 100.0
+    >>> inventory_line.expected_quantity = 0.0
+    >>> inventory.click('confirm')
+    >>> inventory.state
+    'done'
+
+Create shipment out::
+
+    >>> shipment = ShipmentOut()
+    >>> shipment.planned_date = today
+    >>> shipment.customer = customer
+    >>> shipment.warehouse = warehouse_loc
+    >>> shipment.company = company
+    >>> move = shipment.outgoing_moves.new()
+    >>> move.product = product
+    >>> move.uom = unit
+    >>> move.quantity = 10
+    >>> move.from_location = output_loc
+    >>> move.to_location = customer_loc
+    >>> move.company = company
+    >>> move.unit_price = Decimal('1')
+    >>> move.currency = company.currency
+    >>> shipment.click('wait')
+
+Request specific lot in stock assignation::
+
+    >>> move, = shipment.inventory_moves
+    >>> move.lot = lot
+    >>> move.save()
+
+Assign the shipment::
+
+    >>> shipment.click('assign_try')
+    True
+    >>> shipment.state
+    'assigned'
+    >>> move, = shipment.inventory_moves
+    >>> move.from_location.name
+    'Zone2'