diff --git a/test/wiki_factory.rb b/test/wiki_factory.rb
index e6536f28..0fd7df4f 100644
--- a/test/wiki_factory.rb
+++ b/test/wiki_factory.rb
@@ -5,6 +5,8 @@ class WikiFactory
     Gollum::Wiki.default_options = {:universal_toc => false}
     cleanup = Proc.new { FileUtils.rm_r File.join(File.dirname(__FILE__), *%w[examples test.git]) }
     wiki = Gollum::Wiki.new(path)
+    # set 'wiki-' prefix on ids for tests
+    wiki.sanitization.id_prefix = 'wiki-'
     return wiki, path, cleanup
   end
 end