diff --git a/odoo/addons/test_testing_utilities/menu.xml b/odoo/addons/test_testing_utilities/menu.xml
index fa5263efeca..99e409708c2 100644
--- a/odoo/addons/test_testing_utilities/menu.xml
+++ b/odoo/addons/test_testing_utilities/menu.xml
@@ -101,6 +101,8 @@
                 <field name="f2" attrs="{'readonly': [['f1', '=', 63], ['f3', '=', 5]]}"/>
                 <field name="f3"/>
                 <field name="f4"/>
+                <field name="f5" readonly="1"/>
+                <field name="f6" readonly="1" force_save="1"/>
             </form>
         </field>
     </record>
diff --git a/odoo/addons/test_testing_utilities/models.py b/odoo/addons/test_testing_utilities/models.py
index 68dc9172123..98a9fea7e7f 100644
--- a/odoo/addons/test_testing_utilities/models.py
+++ b/odoo/addons/test_testing_utilities/models.py
@@ -10,10 +10,14 @@ class A(models.Model):
     f2 = fields.Integer(default=42)
     f3 = fields.Integer()
     f4 = fields.Integer(compute='_compute_f4')
+    f5 = fields.Integer()
+    f6 = fields.Integer()
 
     @api.onchange('f2')
     def _on_change_f2(self):
         self.f3 = int(self.f2 / 2)
+        self.f5 = self.f2
+        self.f6 = self.f2
 
     @api.depends('f1', 'f2')
     def _compute_f4(self):
diff --git a/odoo/addons/test_testing_utilities/tests/test_form_impl.py b/odoo/addons/test_testing_utilities/tests/test_form_impl.py
index a14d6b93974..e2f0d0d89d3 100644
--- a/odoo/addons/test_testing_utilities/tests/test_form_impl.py
+++ b/odoo/addons/test_testing_utilities/tests/test_form_impl.py
@@ -65,6 +65,19 @@ class TestBasic(TransactionCase):
         with self.assertRaises(AssertionError):
             f.f2 = 42
 
+    def test_readonly_save(self):
+        """ Should not save readonly fields unless they're force_save
+        """
+        f = Form(self.env['test_testing_utilities.a'], view='test_testing_utilities.non_normalized_attrs')
+
+        f.f1 = 1
+        f.f2 = 987
+        self.assertEqual(f.f5, 987)
+        self.assertEqual(f.f6, 987)
+        r = f.save()
+        self.assertEqual(r.f5, 0)
+        self.assertEqual(r.f6, 987)
+
     def test_attrs(self):
         """ Checks that attrs/modifiers with non-normalized domains work
         """
diff --git a/odoo/tests/common.py b/odoo/tests/common.py
index 412634176d3..56b76e01c84 100644
--- a/odoo/tests/common.py
+++ b/odoo/tests/common.py
@@ -1098,7 +1098,7 @@ class Form(object):
         else:
             view_id = view or False
         fvg = recordp.fields_view_get(view_id, 'form')
-        arch = etree.fromstring(fvg['arch'])
+        fvg['tree'] = etree.fromstring(fvg['arch'])
 
         object.__setattr__(self, '_view', fvg)
         # TODO: make this less crappy?
@@ -1107,7 +1107,7 @@ class Form(object):
             if descr['type'] != 'one2many':
                 continue
 
-            node = next(n for n in arch.iter('field') if n.get('name') == f)
+            node = self._get_node(f)
             default_view = next(
                 (m for m in node.get('mode', 'tree').split(',') if m != 'form'),
                 'tree'
@@ -1130,10 +1130,12 @@ class Form(object):
             # if the default view is a kanban or a non-editable list, the
             # "edition controller" is the form view
             edition = views['form']
+            edition['tree'] = etree.fromstring(edition['arch'])
             if default_view == 'tree':
                 subarch = etree.fromstring(views['tree']['arch'])
                 if subarch.get('editable'):
                     edition = views['tree']
+                    edition['tree'] = subarch
 
             self._process_fvg(submodel, edition)
             descr['views']['edition'] = edition
@@ -1153,6 +1155,14 @@ class Form(object):
         else:
             self._init_from_defaults(self._model)
 
+    def _get_node(self, f):
+        """ Find etree node for the field ``f`` in the current arch
+        """
+        return next(
+            n for n in self._view['tree'].iter('field')
+            if n.get('name') == f
+        )
+
     def __str__(self):
         return "<%s %s(%s)>" % (
             type(self).__name__,
@@ -1171,7 +1181,7 @@ class Form(object):
         # pre-resolve modifiers & bind to arch toplevel
         modifiers = fvg['modifiers'] = {}
         contexts = fvg['contexts'] = {}
-        for f in etree.fromstring(fvg['arch']).iter('field'):
+        for f in fvg['tree'].iter('field'):
             fname = f.get('name')
             modifiers[fname] = {
                 modifier: domain if isinstance(domain, bool) else normalize_domain(domain)
@@ -1356,8 +1366,11 @@ class Form(object):
             # skip unmodified fields
             if f not in self._changed:
                 continue
+
             if self._get_modifier(f, 'readonly'):
-                continue
+                node = self._get_node(f)
+                if not node.get('force_save'):
+                    continue
             # TODO: filter out (1, _, {}) from o2m values
             values[f] = v
         return values