1 files changed, 12 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations/belongs_to_associations_test.rb b/activerecord/test/cases/associations/belongs_to_associations_test.rb
index e620b14f94..05ab86105c 100644
--- a/activerecord/test/cases/associations/belongs_to_associations_test.rb
+++ b/activerecord/test/cases/associations/belongs_to_associations_test.rb
@@ -706,6 +706,18 @@ class BelongsToAssociationsTest < ActiveRecord::TestCase
     assert_equal toy, sponsor.reload.sponsorable
   end
 
+  test "stale tracking doesn't care about the type" do
+    apple = Firm.create("name" => "Apple")
+    citibank = Account.create("credit_limit" => 10)
+
+    citibank.firm_id = apple.id
+    citibank.firm # load it
+
+    citibank.firm_id = apple.id.to_s
+
+    assert !citibank.association(:firm).stale_target?
+  end
+
   def test_reflect_the_most_recent_change
     author1, author2 = Author.limit(2)
     post = Post.new(:title => "foo", :body=> "bar")