diff --git a/api/calculator/test_calculator.py b/api/calculator/test_calculator.py
index 69fa778f1..4c0e68150 100644
--- a/api/calculator/test_calculator.py
+++ b/api/calculator/test_calculator.py
@@ -27,4 +27,7 @@ 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
\ No newline at end of file
+    assert Calculator.divide(-4, 2.0) == -2.0
+
+def test_divide_by_0():
+    assert Calculator.divide(2.0, 0) == 'Cannot divide by 0'
\ No newline at end of file