diff --git a/CalculatorLibrary/test_calculator.py b/CalculatorLibrary/test_calculator.py
index e0ba6b6..0e4b62e 100644
--- a/CalculatorLibrary/test_calculator.py
+++ b/CalculatorLibrary/test_calculator.py
@@ -12,3 +12,6 @@ class TestCalculator:
 
     def test_subtract(self):
         assert 2 == calculator.subtract(4, 2)
+
+    def test_multiplication(self):
+        assert 100 == calculator.multiply(10, 10)