diff --git a/master/product/Vifib/Tool/SlapTool.py b/master/product/Vifib/Tool/SlapTool.py
index 0617715a6b05814930b27dd5e12dddc3d20d2cac..9eb7c5165e5ce41fadb108787c2ab86fcbe5b036 100644
--- a/master/product/Vifib/Tool/SlapTool.py
+++ b/master/product/Vifib/Tool/SlapTool.py
@@ -152,7 +152,7 @@ class SlapTool(BaseTool):
 
   def _isTestRun(self):
     if self.getPortalObject().MailHost.__class__.__name__ == 'DummyMailHost' \
-        or self.REQUEST['test_list']:
+        or self.REQUEST.get('test_list'):
       return True
     return False