diff --git a/calculator/tests/unit_tests_calculator.py b/calculator/tests/unit_tests_calculator.py
index 3573845..e9d6e09 100644
--- a/calculator/tests/unit_tests_calculator.py
+++ b/calculator/tests/unit_tests_calculator.py
@@ -1,6 +1,6 @@
 # test_calculator.py
 
-from calculator import add, multiply, divide, subtract, square_root
+from calculator import add, multiply, divide, subtract, square_root, exponentiate
 
 
 def test_addition():
@@ -31,3 +31,9 @@ def test_square_root():
     assert square_root(4) == 2
     assert square_root(25) == 5
     assert square_root(9) == 3
+
+
+def test_exponentiate():
+    assert exponentiate(2, 2) == 4
+    assert exponentiate(-3, 3) == -27
+    assert exponentiate(9, 0) == 1