diff --git a/pylint_odoo/checkers/no_modules.py b/pylint_odoo/checkers/no_modules.py
index 82eed77f..9214a463 100644
--- a/pylint_odoo/checkers/no_modules.py
+++ b/pylint_odoo/checkers/no_modules.py
@@ -191,7 +191,7 @@
     'Other OSI approved licence', 'Other proprietary',
 ]
 DFTL_ATTRIBUTE_DEPRECATED = [
-    '_columns', '_defaults',
+    '_columns', '_defaults', 'length',
 ]
 DFTL_METHOD_REQUIRED_SUPER = [
     'create', 'write', 'read', 'unlink', 'copy',
diff --git a/pylint_odoo/test/main.py b/pylint_odoo/test/main.py
index 275fb4c2..867fdceb 100644
--- a/pylint_odoo/test/main.py
+++ b/pylint_odoo/test/main.py
@@ -12,7 +12,7 @@
 EXPECTED_ERRORS = {
     'api-one-deprecated': 4,
     'api-one-multi-together': 2,
-    'attribute-deprecated': 2,
+    'attribute-deprecated': 3,
     'class-camelcase': 1,
     'consider-merging-classes-inherited': 2,
     'copy-wo-api-one': 2,