diff --git a/test/initializeArrayWithRange/initializeArrayWithRange.js b/test/initializeArrayWithRange/initializeArrayWithRange.js
index 911f6d198..e29b1c842 100644
--- a/test/initializeArrayWithRange/initializeArrayWithRange.js
+++ b/test/initializeArrayWithRange/initializeArrayWithRange.js
@@ -1,3 +1,3 @@
 const initializeArrayWithRange = (end, start = 0, step = 1) =>
-  Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
+  Array.from({length: Math.ceil((end - start + 1) / step)}, (v, i) => i * step + start);
 module.exports = initializeArrayWithRange;
diff --git a/test/initializeArrayWithRange/initializeArrayWithRange.test.js b/test/initializeArrayWithRange/initializeArrayWithRange.test.js
index 8d0febed9..9530d5987 100644
--- a/test/initializeArrayWithRange/initializeArrayWithRange.test.js
+++ b/test/initializeArrayWithRange/initializeArrayWithRange.test.js
@@ -4,6 +4,12 @@ const initializeArrayWithRange = require('./initializeArrayWithRange.js');
 test('initializeArrayWithRange is a Function', () => {
   expect(initializeArrayWithRange).toBeInstanceOf(Function);
 });
-test('Initializes an array containing the numbers in the specified range', () => {
+test('Initializes an array containing the numbers in the specified range (witout start value)', () => {
   expect(initializeArrayWithRange(5)).toEqual([0, 1, 2, 3, 4, 5]);
 });
+test('Initializes an array containing the numbers in the specified range', () => {
+  expect(initializeArrayWithRange(7,3)).toEqual([3, 4, 5, 6, 7]);
+});
+test('Initializes an array containing the numbers in the specified range (with step)', () => {
+  expect(initializeArrayWithRange(9,0,2)).toEqual([0, 2, 4, 6, 8]);
+});