diff --git a/app/calculator.py b/app/calculator.py
index 8a976b25..4b767c9a 100644
--- a/app/calculator.py
+++ b/app/calculator.py
@@ -13,3 +13,6 @@ def divide(x, y):
         if y == 0:
             return 'Cannot divide by 0'
         return x * 1.0 / y
+
+    def add2(x,y,z):
+        return x+y+z
diff --git a/app/test_calculator.py b/app/test_calculator.py
index 13353471..49a4750c 100644
--- a/app/test_calculator.py
+++ b/app/test_calculator.py
@@ -23,11 +23,11 @@ def test_multiply():
     assert Calculator.multiply(2.0, 0.0) == 0.0
     assert Calculator.multiply(-4, 2.0) == -8.0
 
-# def test_divide():
-#     # assert Calculator.divide(1, 2) == 0.5
-#     assert Calculator.divide(1.0, 2.0) == 0.5
-#     assert Calculator.divide(0, 2.0) == 0
-#     assert Calculator.divide(-4, 2.0) == -2.0
-#     # assert Calculator.divide(2.0, 0.0) == 'Cannot divide by 0'
+def test_divide():
+    # assert Calculator.divide(1, 2) == 0.5
+    assert Calculator.divide(1.0, 2.0) == 0.5
+    assert Calculator.divide(0, 2.0) == 0
+    assert Calculator.divide(-4, 2.0) == -2.0
+    # assert Calculator.divide(2.0, 0.0) == 'Cannot divide by 0'