1 files changed, 15 insertions, 4 deletions
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index fee0d2c627..e30577fb49 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -1102,18 +1102,29 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase
     assert_equal [posts(:thinking)], person.reload.first_posts
   end
 
-  def test_has_many_through_with_includes_in_through_association_scope
+  test "has many through with includes in through association scope" do
     assert_not_empty posts(:welcome).author_address_extra_with_address
   end
-  
+
+  test "insert records via has_many_through association with scope" do
+    club = Club.create!
+    member = Member.create!
+    Membership.create!(club: club, member: member)
+
+    club.favourites << member
+    assert_equal [member], club.favourites
+
+    club.reload
+    assert_equal [member], club.favourites
+
   def test_has_many_through_unscope_default_scope
     post = Post.create!(:title => 'Beaches', :body => "I like beaches!")
     Reader.create! :person => people(:david), :post => post
     LazyReader.create! :person => people(:susan), :post => post
-    
+
     assert_equal 2, post.people.to_a.size
     assert_equal 1, post.lazy_people.to_a.size
-    
+
     assert_equal 2, post.lazy_readers_unscope_skimmers.to_a.size
     assert_equal 2, post.lazy_people_unscope_skimmers.to_a.size
   end