diff --git a/activerecord/test/cases/calculations_test.rb b/activerecord/test/cases/calculations_test.rb
index 6cf18bc3c6..299217214e 100644
--- a/activerecord/test/cases/calculations_test.rb
+++ b/activerecord/test/cases/calculations_test.rb
@@ -618,6 +618,13 @@ def test_calculation_with_polymorphic_relation
     assert_equal part.id, ShipPart.joins(:trinkets).sum(:id)
   end
 
+  def test_pluck_joined_with_polymorphic_relation
+    part = ShipPart.create!(name: "has trinket")
+    part.trinkets.create!
+
+    assert_equal [part.id], ShipPart.joins(:trinkets).pluck(:id)
+  end
+
   def test_grouped_calculation_with_polymorphic_relation
     part = ShipPart.create!(name: "has trinket")
     part.trinkets.create!