diff --git a/app/test_calculator.py b/app/test_calculator.py
index 4abcda6..c02c2da 100644
--- a/app/test_calculator.py
+++ b/app/test_calculator.py
@@ -7,25 +7,3 @@ def test_add():
     assert Calculator.add(0, 2.0) == 2.0
     assert Calculator.add(2.0, 0) == 2.0
     assert Calculator.add(-4, 2.0) == -2.0
-
-def test_subtract():
-    assert Calculator.subtract(1, 2) == -1.0
-    assert Calculator.subtract(2, 1) == 1.0
-    assert Calculator.subtract(1.0, 2.0) == -1.0
-    assert Calculator.subtract(0, 2.0) == -2.0
-    assert Calculator.subtract(2.0, 0.0) == 2.0
-    assert Calculator.subtract(-4, 2.0) == -6.0
-
-def test_multiply():
-    assert Calculator.multiply(1, 2) == 2.0
-    assert Calculator.multiply(1.0, 2.0) == 2.0
-    assert Calculator.multiply(0, 2.0) == 0.0
-    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'