diff --git a/testserver_o2b/models/init_test.py b/testserver_o2b/models/init_test.py
index ba0a7e4..a4ef1c1 100644
--- a/testserver_o2b/models/init_test.py
+++ b/testserver_o2b/models/init_test.py
@@ -14,9 +14,9 @@ class CustomModel(models.Model):
     _name = 'testserver_o2b.testserver_o2b'
     _description = 'Mailcatcher'
 
-def get_external_content():
-    response = requests.get('http://localhost:8025')
-    return response.text
+    def get_external_content():
+        response = requests.get('http://localhost:8025')
+        return response.text
 
     html_field = fields.Html('HTML Field')
     external_content = fields.Text('Externe Inhoud')