diff --git a/activesupport/lib/active_support/log_subscriber/test_helper.rb b/activesupport/lib/active_support/log_subscriber/test_helper.rb
index 63dad7e01ad009af3c7ba5eb2f854f875a96e303..f9a98686d30cad154780e4cab2be1756c5590d98 100644
--- a/activesupport/lib/active_support/log_subscriber/test_helper.rb
+++ b/activesupport/lib/active_support/log_subscriber/test_helper.rb
@@ -15,7 +15,7 @@ class LogSubscriber
     #     end
     #
     #     def test_basic_query_logging
-    #       Developer.all
+    #       Developer.all.to_a
     #       wait
     #       assert_equal 1, @logger.logged(:debug).size
     #       assert_match(/Developer Load/, @logger.logged(:debug).last)