diff --git a/test_me_on_student3.py b/test_me_on_student3.py
new file mode 100644
index 0000000000000000000000000000000000000000..1219fa4b2141def506bef414fd4789500a7a179f
--- /dev/null
+++ b/test_me_on_student3.py
@@ -0,0 +1,49 @@
+import unittest
+from other.student3.Calculator import StringCalculator #momo
+
+class TestMyCasesOnStudent3(unittest.TestCase):
+    def setUp(self):
+        self.calc = StringCalculator()
+
+    def test_empty_string(self):
+        self.assertEqual(self.calc.add(""), 0)
+
+    def test_single_number(self):
+        self.assertEqual(self.calc.add("1"), 1)
+
+    def test_two_numbers(self):
+        self.assertEqual(self.calc.add("1,2"), 3)
+
+    def test_multiple_numbers(self):
+        self.assertEqual(self.calc.add("1,2,3,4,5"), 15)
+
+    def test_numbers_with_newline(self):
+        self.assertEqual(self.calc.add("1\n2,3"), 6)
+
+    def test_multiple_newlines(self):
+        self.assertEqual(self.calc.add("1\n2\n3\n4\n5"), 15)
+
+    def test_negative_number(self):
+        with self.assertRaises(ValueError) as e:
+            self.calc.add("1,-2,3")
+        self.assertEqual(str(e.exception), "negatives not allowed: -2")
+
+    def test_multiple_negative_numbers(self):
+        with self.assertRaises(ValueError) as e:
+            self.calc.add("1,-2,-3,4")
+        self.assertEqual(str(e.exception), "negatives not allowed: -2,-3")
+
+    def test_custom_delimiter(self):
+        self.assertEqual(self.calc.add("//;\n1;2"), 3)
+
+    def test_custom_delimiter_with_newline(self):
+        self.assertEqual(self.calc.add("//;\n1;2\n3"), 6)
+
+    def test_ignore_numbers_over_1000(self):
+        self.assertEqual(self.calc.add("2,1001"), 2)
+
+    def test_custom_delimiter_any_length(self):
+        self.assertEqual(self.calc.add("//[***]\n1***2***3"), 6)
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/test_student3_on_me.py b/test_student3_on_me.py
new file mode 100644
index 0000000000000000000000000000000000000000..a498fc07f928bc4c93471fba72492027479390ee
--- /dev/null
+++ b/test_student3_on_me.py
@@ -0,0 +1,49 @@
+import unittest
+from my_string_calculator import StringCalculator #Momo
+
+class TestStudent3CasesOnMe(unittest.TestCase):
+    def setUp(self):
+        self.calc = StringCalculator()
+
+    def test_empty_string(self):
+        self.assertEqual(self.calc.add(""), 0)
+
+    def test_single_number(self):
+        self.assertEqual(self.calc.add("5"), 5)
+
+    def test_multiple_numbers(self):
+        self.assertEqual(self.calc.add("5,5"), 10)
+
+    def test_unknown_amount_of_numbers(self):
+        self.assertEqual(self.calc.add("1,2,3"), 6)
+        self.assertEqual(self.calc.add("10,20,30,40"), 100)
+        self.assertEqual(self.calc.add("1,2,3,4,5,6"), 21)
+
+    def test_numbers_separated_by_newline(self):
+        self.assertEqual(self.calc.add("1\n2"), 3)
+        self.assertEqual(self.calc.add("1\n2\n3"), 6)
+        self.assertEqual(self.calc.add("10,20\n30"), 60)
+
+    def test_negative_number_exception(self):
+        with self.assertRaises(ValueError) as e:
+            self.calc.add("-1,2")
+        self.assertEqual(str(e.exception), "Negatives not allowed: -1")
+
+    def test_multiple_negative_numbers_exception(self):
+        with self.assertRaises(ValueError) as e:
+            self.calc.add("-1,-2,3")
+        self.assertEqual(str(e.exception), "Negatives not allowed: -1, -2")
+
+    def test_add_numbers_with_custom_delimiter(self):
+        self.assertEqual(self.calc.add("//;\n1;2;3"), 6)
+
+    def test_ignore_numbers_over_1000(self):
+        self.assertEqual(self.calc.add("1,1001,2,3"), 6)
+
+    def test_custom_delimiter_with_long_pattern(self):
+        self.assertEqual(self.calc.add("//[***]\n1***2***3"), 6)
+        self.assertEqual(self.calc.add("//[+++]\n1+++2+++3"), 6)
+        self.assertEqual(self.calc.add("//[aa]\n1aa2aa3"), 6)
+
+if __name__ == "__main__":
+    unittest.main()