diff --git a/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb b/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
index 09ef58dd0..a2902f4d9 100644
--- a/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
+++ b/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
@@ -92,7 +92,7 @@ if Object.const_defined?(:Commonmarker)
     def test_should_remove_invalid_div_class
       html = '<div class="bad-class">Text</div>'
       sanitized = filter(html)
-      refute_includes 'bad-class', sanitized
+      assert_not_includes 'bad-class', sanitized
     end
 
     def test_should_remove_invalid_p_class