diff --git a/t/Roman.t b/t/Roman.t
index 70874872a..77928740c 100755
--- a/t/Roman.t
+++ b/t/Roman.t
@@ -34,6 +34,8 @@ ddg_goodie_test(
     'roman IV' => build_test('4 (roman numeral conversion)', 'IV', '4'),
     '10 in roman numeral' => build_test('X (roman numeral conversion)', '10', 'X'),
     '11 in roman numerals' => build_test('XI (roman numeral conversion)', '11', 'XI'),
+    'xiii to arabic' => build_test('13 (roman numeral conversion)', 'XIII', '13'),
+    '20 to roman numerals' => build_test('XX (roman numeral conversion)', '20', 'XX'),
 );
 
 done_testing;