diff --git a/addons/mrp/mrp.py b/addons/mrp/mrp.py
index b8ce7752402..607ce73556c 100644
--- a/addons/mrp/mrp.py
+++ b/addons/mrp/mrp.py
@@ -47,13 +47,13 @@ class mrp_workcenter(osv.osv):
         'time_start': fields.float('Time before prod.', help="Time in hours for the setup."),
         'time_stop': fields.float('Time after prod.', help="Time in hours for the cleaning."),
         'costs_hour': fields.float('Cost per hour', help="Specify Cost of Work Center per hour."),
-        'costs_hour_account_id': fields.many2one('account.analytic.account', 'Hour Account', domain=[('type','<>','view')],
+        'costs_hour_account_id': fields.many2one('account.analytic.account', 'Hour Account', domain=[('type','!=','view')],
             help="Fill this only if you want automatic analytic accounting entries on production orders."),
         'costs_cycle': fields.float('Cost per cycle', help="Specify Cost of Work Center per cycle."),
-        'costs_cycle_account_id': fields.many2one('account.analytic.account', 'Cycle Account', domain=[('type','<>','view')],
+        'costs_cycle_account_id': fields.many2one('account.analytic.account', 'Cycle Account', domain=[('type','!=','view')],
             help="Fill this only if you want automatic analytic accounting entries on production orders."),
         'costs_journal_id': fields.many2one('account.analytic.journal', 'Analytic Journal'),
-        'costs_general_account_id': fields.many2one('account.account', 'General Account', domain=[('type','<>','view')]),
+        'costs_general_account_id': fields.many2one('account.account', 'General Account', domain=[('type','!=','view')]),
         'resource_id': fields.many2one('resource.resource','Resource', ondelete='cascade', required=True),
         'product_id': fields.many2one('product.product','Work Center Product', help="Fill this product to easily track your production costs in the analytic accounting."),
     }
@@ -707,7 +707,7 @@ class mrp_production(osv.osv):
 
         produced_qty = 0
         for produced_product in production.move_created_ids2:
-            if (produced_product.scrapped) or (produced_product.product_id.id <> production.product_id.id):
+            if (produced_product.scrapped) or (produced_product.product_id.id != production.product_id.id):
                 continue
             produced_qty += produced_product.product_qty
         if production_mode in ['consume','consume_produce']:
@@ -914,7 +914,7 @@ class mrp_production(osv.osv):
         # If usage of routing location is a internal, make outgoing shipment otherwise internal shipment
         if production.bom_id.routing_id and production.bom_id.routing_id.location_id:
             routing_loc = production.bom_id.routing_id.location_id
-            if routing_loc.usage <> 'internal':
+            if routing_loc.usage != 'internal':
                 pick_type = 'out'
             partner_id = routing_loc.partner_id and routing_loc.partner_id.id or False
 
diff --git a/addons/mrp/mrp_view.xml b/addons/mrp/mrp_view.xml
index ed60d1e550e..87ccd0f98ea 100644
--- a/addons/mrp/mrp_view.xml
+++ b/addons/mrp/mrp_view.xml
@@ -625,7 +625,7 @@
                     </div>
                     <group>
                         <group>
-                            <field name="product_id" on_change="product_id_change(product_id)" domain="[('bom_ids','&lt;&gt;',False),('bom_ids.bom_id','=',False)]" class="oe_inline" context='{"default_supply_method":"produce", "default_type": "product"}'/>
+                            <field name="product_id" on_change="product_id_change(product_id)" domain="[('bom_ids','!=',False),('bom_ids.bom_id','=',False)]" class="oe_inline" context='{"default_supply_method":"produce", "default_type": "product"}'/>
                             <label for="product_qty"/>
                             <div>
                                 <field name="product_qty" class="oe_inline"/>
@@ -658,7 +658,7 @@
                         <page string="Consumed Products">
                             <group>
                                 <group string="Products to Consume">
-                                    <field name="move_lines" domain="[('state','&lt;&gt;', ('done', 'cancel'))]" nolabel="1">
+                                    <field name="move_lines" domain="[('state','not in', ('done', 'cancel'))]" nolabel="1">
                                         <tree colors="blue:state == 'draft';black:state in ('picking_except','confirmed','ready');gray:state in ('cancel','done') " string="Products to Consume">
                                             <field name="product_id"/>
                                             <field name="product_qty"  string="Quantity"/>
@@ -704,7 +704,7 @@
                         <page string="Finished Products">
                             <group>
                                 <group string="Products to Produce">
-                                    <field name="move_created_ids" domain="[('state','&lt;&gt;', ('done', 'cancel'))]" nolabel="1">
+                                    <field name="move_created_ids" domain="[('state','not in', ('done', 'cancel'))]" nolabel="1">
                                         <tree string="Products to Finish">
                                             <field name="product_id"/>
                                             <field name="product_qty"/>
diff --git a/addons/mrp/test/order_process.yml b/addons/mrp/test/order_process.yml
index f8a2ebfbf99..a714035a9cd 100644
--- a/addons/mrp/test/order_process.yml
+++ b/addons/mrp/test/order_process.yml
@@ -71,7 +71,7 @@
     partner_id = False
     if order.bom_id.routing_id and order.bom_id.routing_id.location_id:
         routing_loc = order.bom_id.routing_id.location_id
-        if routing_loc.usage <> 'internal':
+        if routing_loc.usage != 'internal':
             pick_type = 'out'
         partner_id = routing_loc.partner_id and routing_loc.partner_id.id or False
         routing_loc = routing_loc.id