1 files changed, 10 insertions, 1 deletions
diff --git a/activesupport/test/json/encoding_test.rb b/activesupport/test/json/encoding_test.rb
index 340a2abf75..8062873386 100644
--- a/activesupport/test/json/encoding_test.rb
+++ b/activesupport/test/json/encoding_test.rb
@@ -3,7 +3,6 @@
 require "securerandom"
 require "abstract_unit"
 require "active_support/core_ext/string/inflections"
-require "active_support/core_ext/regexp"
 require "active_support/json"
 require "active_support/time"
 require "time_zone_test_helpers"
@@ -158,6 +157,16 @@ class TestJSONEncoding < ActiveSupport::TestCase
     assert_equal({ "foo" => "hello" }, JSON.parse(json))
   end
 
+  def test_struct_to_json_with_options_nested
+    klass = Struct.new(:foo, :bar)
+    struct = klass.new "hello", "world"
+    parent_struct = klass.new struct, "world"
+    json = parent_struct.to_json only: [:foo]
+
+    assert_equal({ "foo" => { "foo" => "hello" } }, JSON.parse(json))
+  end
+
+
   def test_hash_should_pass_encoding_options_to_children_in_as_json
     person = {
       name: "John",