diff --git a/converter.py b/converter.py
index b572325146de479b1edb1e89b81872e073c19f8c..b51be3f59f30678c283a233b008ea585d2e371e4 100644
--- a/converter.py
+++ b/converter.py
@@ -26,7 +26,7 @@ class IConverter(ABC):
 
 class Converter(IConverter):
     def convert(self, num: int) -> str:
-        roman_numbers = [(1, 'I')]
+        roman_numbers = [(4, 'IV'), (1, 'I')]
         
         roman_str = ''
 
@@ -54,6 +54,10 @@ class TestConverter(unittest.TestCase):
         res = self.c.convert(3)
         self.assertEqual(res, 'III')
 
+    def test_convertTwo(self):
+        res = self.c.convert(4)
+        self.assertEqual(res, 'IV')
+
     
 
 if __name__ == "__main__":