diff --git a/test/test_helper.rb b/test/test_helper.rb
index 6aa1d28..810bdb3 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -76,6 +76,10 @@ class Test::Unit::TestCase
     user
   end
 
+  def assert_equivalent(enum1, enum2)
+    assert((enum1 - enum2) == [] && (enum2 - enum1) == []), "<#{enum1.inspect}> expected to be equivalent to <#{enum2.inspect}>"
+  end
+
   private
 
   def uses_host(name)
--
libgit2 0.21.2