diff --git a/stringCalculator.py b/stringCalculator.py
index 99b2578444306cbf881925cf8cc154ff18340a22..3a06e0738d13b7f89e781bea706839a57d02eb8f 100644
--- a/stringCalculator.py
+++ b/stringCalculator.py
@@ -52,5 +52,9 @@ class TestStringCalculator(unittest.TestCase):
         res = self.c.add("1,2")
         self.assertEqual(res, 3)
 
+    def test_addingTwoNumbersWithZero(self):
+        res = self.c.add("0,5")
+        self.assertEqual(res, 5)
+
 if __name__ == "__main__":
     unittest.main()
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