diff --git a/src/grokui/admin/tests/security.py b/src/grokui/admin/tests/security.py
index b622a1d..11c27d8 100644
--- a/src/grokui/admin/tests/security.py
+++ b/src/grokui/admin/tests/security.py
@@ -80,6 +80,7 @@
   >>> import os.path
   >>> fake_source = os.path.join(os.path.dirname(__file__), 'releaseinfo')
   >>> fake_source_url = 'file://%s' % fake_source + os.path.sep
+  >>> fake_source_url = fake_source_url.replace(os.path.sep, '/')
   >>> sn.setLookupURL(fake_source_url)
 
 Now we can safely enable the notifier and see, whether there are infos