1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/json_test.rb b/activerecord/test/cases/adapters/postgresql/json_test.rb
index a3400a5a19..3c07209472 100644
--- a/activerecord/test/cases/adapters/postgresql/json_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/json_test.rb
@@ -183,6 +183,7 @@ class PostgresqlJSONTest < ActiveRecord::TestCase
     json.save!
     json.reload
 
-    assert json.payload['three'] = 'four'
+    assert_equal({ 'one' => 'two', 'three' => 'four' }, json.payload)
+    assert_not json.changed?
   end
 end