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 87f67a76a..8cd6074ee 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
@@ -47,9 +47,9 @@ if Object.const_defined?(:CommonMarker)
     end
 
     def test_should_support_footnotes
-      input = %(<a href="#fn1" id="fnref1">foo</a>)
+      input = %(<a href="#fn-1" id="fnref-1">foo</a>)
       assert_equal input, filter(input)
-      input = %(<ol><li id="fn1">footnote</li></ol>)
+      input = %(<ol><li id="fn-1">footnote</li></ol>)
       assert_equal input, filter(input)
     end