diff --git a/08_calculator/calculator.js b/08_calculator/calculator.js
index c22e8d2..e6c682f 100644
--- a/08_calculator/calculator.js
+++ b/08_calculator/calculator.js
@@ -1,9 +1,9 @@
-const add = function() {
-	
+const add = function(a, b) {
+	return a + b;
 };
 
 const subtract = function() {
-	
+
 };
 
 const sum = function() {
diff --git a/08_calculator/calculator.spec.js b/08_calculator/calculator.spec.js
index 48b08c9..d79d0dd 100644
--- a/08_calculator/calculator.spec.js
+++ b/08_calculator/calculator.spec.js
@@ -5,11 +5,11 @@ describe('add', () => {
     expect(calculator.add(0, 0)).toBe(0);
   });
 
-  test.skip('adds 2 and 2', () => {
+  test('adds 2 and 2', () => {
     expect(calculator.add(2, 2)).toBe(4);
   });
 
-  test.skip('adds positive numbers', () => {
+  test('adds positive numbers', () => {
     expect(calculator.add(2, 6)).toBe(8);
   });
 });