diff --git a/odoo/service/server.py b/odoo/service/server.py
index 034409b7c32..7d36ec9a3cc 100644
--- a/odoo/service/server.py
+++ b/odoo/service/server.py
@@ -87,6 +87,9 @@ class BaseWSGIServerNoBind(LoggingBaseWSGIServerMixIn, werkzeug.serving.BaseWSGI
 
 class RequestHandler(werkzeug.serving.WSGIRequestHandler):
     def setup(self):
+        # timeout to avoid chrome headless preconnect during tests
+        if config['test_enable'] or config['test_file']:
+            self.timeout = 5
         # flag the current thread as handling a http request
         super(RequestHandler, self).setup()
         me = threading.currentThread()