diff --git a/test_me_on_student2.py b/test_me_on_student2.py
new file mode 100644
index 0000000000000000000000000000000000000000..62056a319309a069b18b2a6191c5da8f9d2ddd2f
--- /dev/null
+++ b/test_me_on_student2.py
@@ -0,0 +1,52 @@
+import unittest
+from other.student2.Calculator import StringCalculator  #wasili
+
+class TestMeOnStudent2(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_numbers_with_multiple_newlines(self):
+        self.assertEqual(self.calc.add("1\n2\n3\n4\n5"), 15)
+    
+    def test_negative_number(self):
+        with self.assertRaises(ValueError) as context:
+            self.calc.add("1,-2,3")
+        self.assertEqual(str(context.exception), "negatives not allowed: -2")
+
+    def test_multiple_negative_numbers(self):
+        with self.assertRaises(ValueError) as context:
+            self.calc.add("1,-2,-3,4")
+        self.assertEqual(str(context.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_custom_delimiter_with_multiple_numbers(self):
+        self.assertEqual(self.calc.add("//|\n1|2|3|4"), 10)
+    
+    def test_numbers_greater_than_1000(self):
+        self.assertEqual(self.calc.add("2,1001"), 2)
+    
+    def test_numbers_greater_than_1000_with_custom_delimiter(self):
+        self.assertEqual(self.calc.add("//;\n2;1001"), 2)
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/test_student2_on_me.py b/test_student2_on_me.py
new file mode 100644
index 0000000000000000000000000000000000000000..ad6d014541c3df51cde650a07974c6b5386646a8
--- /dev/null
+++ b/test_student2_on_me.py
@@ -0,0 +1,47 @@
+import unittest
+from my_string_calculator import StringCalculator  # Wasili
+
+class TestStudent2OnMe(unittest.TestCase):
+    def setUp(self):
+        self.calc = StringCalculator()
+
+    def test_add_empty(self):
+        self.assertEqual(self.calc.add(""), 0)
+
+    def test_add_one_string(self):
+        self.assertEqual(self.calc.add("1"), 1)
+
+    def test_add_two_string(self):
+        self.assertEqual(self.calc.add("1,2"), 3)
+
+    def test_add_multiple_string(self):
+        self.assertEqual(self.calc.add("1,2,3,4,5,6,7"), 28)
+
+    def test_add_new_lines(self):
+        self.assertEqual(self.calc.add("1\n2,3,4"), 10)
+
+    def test_add_exception(self):
+        with self.assertRaises(ValueError) as context:
+            self.calc.add("-5")
+        self.assertEqual(str(context.exception), "Negatives not allowed: -5")
+
+    def test_add_negative_numbers(self):
+        with self.assertRaises(ValueError) as context:
+            self.calc.add("-5,-2,-2")
+        self.assertEqual(str(context.exception), "Negatives not allowed: -5, -2, -2")
+
+    def test_add_different_delimiters(self):
+        self.assertEqual(self.calc.add("//;\n1;2"), 3)
+
+    def test_add_numbers_greater_than_1000(self):
+        self.assertEqual(self.calc.add("2,1001"), 2)
+        self.assertEqual(self.calc.add("2,10022\n6"), 8)
+
+    def test_delimiters_of_any_length(self):
+        self.assertEqual(self.calc.add("//[***]\n1***2***3"), 6)
+
+    def test_delimiters_of_any_length2(self):
+        self.assertEqual(self.calc.add("//[*+*+*]\n1*+*+*2*+*+*3*+*+*220"), 226)
+
+if __name__ == "__main__":
+    unittest.main()