diff --git a/spec/bundler/support/helpers.rb b/spec/bundler/support/helpers.rb
index b532fdc462..50cf4438d9 100644
--- a/spec/bundler/support/helpers.rb
+++ b/spec/bundler/support/helpers.rb
@@ -576,5 +576,11 @@ module Spec
       end
       port
     end
+
+  private
+
+    def git_root_dir?
+      root.to_s == `git rev-parse --show-toplevel`.chomp
+    end
   end
 end