1 files changed, 10 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/hstore_test.rb b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
index c9982d3705..1f35300739 100644
--- a/activerecord/test/cases/adapters/postgresql/hstore_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
@@ -10,6 +10,12 @@ if ActiveRecord::Base.connection.supports_extensions?
       store_accessor :settings, :language, :timezone
     end
 
+    class FakeParameters
+      def to_unsafe_h
+        { "hi" => "hi" }
+      end
+    end
+
     def setup
       @connection = ActiveRecord::Base.connection
 
@@ -321,6 +327,10 @@ if ActiveRecord::Base.connection.supports_extensions?
       assert_match %r[t\.hstore "tags",\s+default: {}], output
     end
 
+    def test_supports_to_unsafe_h_values
+      assert_equal("\"hi\"=>\"hi\"", @type.serialize(FakeParameters.new))
+    end
+
     private
       def assert_array_cycle(array)
         # test creation