diff --git a/leapYears/leapYears.js b/leapYears/leapYears.js
index 68e3af8..720c763 100644
--- a/leapYears/leapYears.js
+++ b/leapYears/leapYears.js
@@ -1,5 +1,11 @@
-const leapYears = function() {
-
+const leapYears = function (checkLeapYear) {
+  if (checkLeapYear % 100 === 0 && checkLeapYear % 400 === 0) {
+    return true;
+  } else if (checkLeapYear % 4 === 0 && checkLeapYear % 100 !== 0) {
+    return true;
+  } else {
+    return false;
+  }
 };
 
 module.exports = leapYears;
diff --git a/leapYears/leapYears.spec.js b/leapYears/leapYears.spec.js
index 6fdaba9..d608639 100644
--- a/leapYears/leapYears.spec.js
+++ b/leapYears/leapYears.spec.js
@@ -1,22 +1,22 @@
-const leapYears = require('./leapYears')
+const leapYears = require("./leapYears");
 
-describe('leapYears', () => {
-  test('works with non century years', () => {
+describe("leapYears", () => {
+  test("works with non century years", () => {
     expect(leapYears(1996)).toBe(true);
   });
-  test.skip('works with non century years', () => {
+  test("works with non century years", () => {
     expect(leapYears(1997)).toBe(false);
   });
-  test.skip('works with ridiculously futuristic non century years', () => {
+  test("works with ridiculously futuristic non century years", () => {
     expect(leapYears(34992)).toBe(true);
   });
-  test.skip('works with century years', () => {
+  test("works with century years", () => {
     expect(leapYears(1900)).toBe(false);
   });
-  test.skip('works with century years', () => {
+  test("works with century years", () => {
     expect(leapYears(1600)).toBe(true);
   });
-  test.skip('works with century years', () => {
+  test("works with century years", () => {
     expect(leapYears(700)).toBe(false);
   });
 });