diff --git a/Library/Homebrew/dev-cmd/tests.rb b/Library/Homebrew/dev-cmd/tests.rb
index c032b34372..b4f3c2d40d 100644
--- a/Library/Homebrew/dev-cmd/tests.rb
+++ b/Library/Homebrew/dev-cmd/tests.rb
@@ -46,6 +46,7 @@ module Homebrew
 
       files = Dir.glob("test/**/*_test.rb")
                  .reject { |p| !OS.mac? && p.start_with?("test/os/mac/") }
+                 .reject { |p| p.start_with?("test/vendor/bundle/") }
 
       opts = []
       opts << "--serialize-stdout" if ENV["CI"]