diff --git a/labs/nodejs/sum.js b/labs/nodejs/sum.js
index e54faa6..f509d4a 100644
--- a/labs/nodejs/sum.js
+++ b/labs/nodejs/sum.js
@@ -1,5 +1,5 @@
 function sum(a, b) {
-  return 0;
+  return a+b;
 }
 
 module.exports = sum;
diff --git a/labs/nodejs/sum.test.js b/labs/nodejs/sum.test.js
index 5000f06..4635227 100644
--- a/labs/nodejs/sum.test.js
+++ b/labs/nodejs/sum.test.js
@@ -1,5 +1,13 @@
 const sum = require("./sum");
 
-test.skip("adds 1 + 2 to equal 3", () => {
-  expect(sum(1, 2)).toBe(3)
+test("adds 1 + 2 to equal 3", () => {
+  expect(sum(1, 2)).toBe(3);
+});
+
+test("adds 100 + 20 to equal 120", () => {
+  expect(sum(100, 20)).toBe(120);
+});
+
+test("adds 12 + 7 to equal 19", () => {
+  expect(sum(12, 7)).toBe(19);
 });