diff --git a/activesupport/test/deprecation_test.rb b/activesupport/test/deprecation_test.rb
index 3ff2d7ffe7..520623df11 100644
--- a/activesupport/test/deprecation_test.rb
+++ b/activesupport/test/deprecation_test.rb
@@ -979,18 +979,20 @@ def generated_method_that_call_deprecation(deprecator)
     @deprecator.behavior = ->(message, *) { @message = message }
     method_that_emits_deprecation_with_internal_method(@deprecator)
 
-    assert_not_includes(@message, "internal")
+    assert_includes(@message, "/path/to/user/code.rb")
   end
 
+  class_eval(<<~RUBY, "/path/to/user/code.rb", 1)
+    def method_that_emits_deprecation_with_internal_method(deprecator)
+      [1].each { deprecator.warn }
+    end
+  RUBY
+
   private
     def method_that_emits_deprecation(deprecator)
       deprecator.warn
     end
 
-    def method_that_emits_deprecation_with_internal_method(deprecator)
-      [1].each { deprecator.warn }
-    end
-
     def with_rails_application_deprecators(&block)
       application = Struct.new(:deprecators).new(ActiveSupport::Deprecation::Deprecators.new)
       rails = Struct.new(:application).new(application)