diff --git a/test/serializer_test.rb b/test/serializer_test.rb
index f740de59..5d832044 100644
--- a/test/serializer_test.rb
+++ b/test/serializer_test.rb
@@ -434,8 +434,20 @@ class SerializerTest < ActiveModel::TestCase
     ], serializer.as_json)
   end
 
-  def test_sets_use_an_array_serializer
-    assert_equal Set.new.active_model_serializer, ActiveModel::ArraySerializer
+  def test_sets_can_be_serialized
+    post1 = Post.new(:title => "Post1", :author => "Author1", :id => 1)
+    post2 = Post.new(:title => "Post2", :author => "Author2", :id => 2)
+
+    set = Set.new
+    set << post1
+    set << post2
+
+    serializer = set.active_model_serializer.new set, :each_serializer => CustomPostSerializer
+
+    assert_equal([
+      { :title => "Post1" },
+      { :title => "Post2" }
+    ], serializer.as_json)
   end
 
   class CustomBlog < Blog