diff --git a/addons/website/tests/test_performance.py b/addons/website/tests/test_performance.py
index 9dcca13c472..c257de62b88 100644
--- a/addons/website/tests/test_performance.py
+++ b/addons/website/tests/test_performance.py
@@ -119,4 +119,4 @@ class TestWebsitePerformance(UtilPerf):
         # assets route /web/content/..
         self.url_open('/')  # create assets attachments
         assets_url = self.env['ir.attachment'].search([('url', '=like', '/web/content/%/web.assets_common%.js')], limit=1).url
-        self.assertEqual(self._get_url_hot_query(assets_url), 6)
+        self.assertEqual(self._get_url_hot_query(assets_url), 5)
diff --git a/odoo/addons/base/models/ir_http.py b/odoo/addons/base/models/ir_http.py
index 1cc56cb0383..52ba58d5651 100644
--- a/odoo/addons/base/models/ir_http.py
+++ b/odoo/addons/base/models/ir_http.py
@@ -318,7 +318,8 @@ class IrHttp(models.AbstractModel):
             # We have prefetched some fields of record, among which the field
             # 'write_date' used by '__last_update' below. In order to check
             # access on record, we have to invalidate its cache first.
-            record._cache.clear()
+            if not record.env.su:
+                record._cache.clear()
             record['__last_update']
         except AccessError:
             return None, 403