diff --git a/trytond/trytond/config.py b/trytond/trytond/config.py
index 35d6024e4e4..2a7116228d3 100644
--- a/trytond/trytond/config.py
+++ b/trytond/trytond/config.py
@@ -49,7 +49,7 @@ def parse_uri(uri):
 
 class TrytonConfigParser(configparser.ConfigParser):
 
-    def __init__(self):
+    def __init__(self, overrides=None):
         super().__init__(interpolation=None)
         self.add_section('web')
         self.set('web', 'listen', 'localhost:8000')
@@ -111,6 +111,8 @@ def __init__(self):
         self.set('bus', 'cache_timeout', '5')
         self.set('bus', 'select_timeout', '5')
         self.add_section('html')
+        if overrides:
+            self.update_etc(configfile=overrides)
         self.update_environ()
         self.update_etc()
 
@@ -176,8 +178,14 @@ def getboolean(self, section, option, *args, **kwargs):
                 AttributeError):
             return default
 
+    def apply_overriden_defaults(self):
+        overrides = self.get('admin', 'config_default_overrides')
+        if not overrides:
+            return self
+        return TrytonConfigParser(overrides=overrides)
 
-config = TrytonConfigParser()
+
+config = TrytonConfigParser().apply_overriden_defaults()
 
 if os.path.basename(getattr(main, '__file__', '')) != 'trytond-stat':
     status.start(config.get('database', 'path'))