diff --git a/Library/Homebrew/cmd/test-bot.rb b/Library/Homebrew/cmd/test-bot.rb
index a001d461fd..81d8c46871 100644
--- a/Library/Homebrew/cmd/test-bot.rb
+++ b/Library/Homebrew/cmd/test-bot.rb
@@ -34,7 +34,8 @@ module Homebrew
 
   def homebrew_git_repo tap=nil
     if tap
-        HOMEBREW_LIBRARY/"Taps/#{tap}"
+        user, repo = tap.split "/"
+        HOMEBREW_LIBRARY/"Taps/#{user}/homebrew-#{repo}"
       else
         HOMEBREW_REPOSITORY
       end