1 files changed, 7 insertions, 0 deletions
diff --git a/activerecord/test/cases/connection_management_test.rb b/activerecord/test/cases/connection_management_test.rb
index dff6ea0fb0..cf8c4c688a 100644
--- a/activerecord/test/cases/connection_management_test.rb
+++ b/activerecord/test/cases/connection_management_test.rb
@@ -94,6 +94,13 @@ module ActiveRecord
         assert response_body.respond_to?(:to_path)
         assert_equal response_body.to_path, "/path"
       end
+
+      test "doesn't mutate the original response" do
+        original_response = [200, {}, 'hi']
+        app = lambda { |_| original_response }
+        response_body = ConnectionManagement.new(app).call(@env)[2]
+        assert_equal original_response.last, 'hi'
+      end
     end
   end
 end