diff --git a/Library/Homebrew/cmd/test-bot.rb b/Library/Homebrew/cmd/test-bot.rb
index d02373973d..6d70df6b97 100644
--- a/Library/Homebrew/cmd/test-bot.rb
+++ b/Library/Homebrew/cmd/test-bot.rb
@@ -287,12 +287,6 @@ module Homebrew
         end.compact
       end
 
-      def brew_update
-        return unless current_branch == "master"
-        success = quiet_system "brew", "update"
-        success ||= quiet_system "brew", "update"
-      end
-
       @category = __method__
       @start_branch = current_branch