diff --git a/calc/Calc_Test b/calc/Calc_Test
index e9845a75b665406148393cd10cdfb29baa9cfee6..29611ea11eb077ffafa22234f32205488487ed57 100644
--- a/calc/Calc_Test
+++ b/calc/Calc_Test
@@ -1,5 +1,11 @@
 import unittest
-from Calculator import Calculator
+
+class Calculator:
+    def add(self, a, b):
+        return a + b
+
+    def sub(self, a, b):
+        return a - b
 
 class TestCalculator(unittest.TestCase):
     def setUp(self):