diff --git a/app/test_calculator.py b/app/test_calculator.py
index e9513f43..89cd1929 100644
--- a/app/test_calculator.py
+++ b/app/test_calculator.py
@@ -25,6 +25,7 @@ def test_multiply():
 
 def test_divide():
     assert Calculator.divide(1, 2) == 0.5
+    assert Calculator.divide(1, 1) == 1
     assert Calculator.divide(1.0, 2.0) == 0.5
     assert Calculator.divide(0, 2.0) == 0
     assert Calculator.divide(-4, 2.0) == -2.0