Package shipping test scenarios depend on sale_shipment_cost

setup.py

@@ -66,6 +66,7 @@ requires.append(get_require_version('trytond'))
 tests_require = [
     get_require_version('proteus'),
     get_require_version('trytond_sale'),
+    get_require_version('trytond_sale_shipment_cost'),
     ]
 dependency_links = []
 if minor_version % 2:

tests/scenario_shipping_dpd.rst

@@ -21,7 +21,8 @@ Imports::
 
 Activate modules::
 
-    >>> config = activate_modules(['stock_package_shipping_dpd', 'sale'])
+    >>> config = activate_modules(
+    ...     ['stock_package_shipping_dpd', 'sale', 'sale_shipment_cost'])
 
 Create company::