diff --git a/Project-Euler/test/Problem014.test.js b/Project-Euler/test/Problem014.test.js
new file mode 100644
index 0000000000..ff464dd42d
--- /dev/null
+++ b/Project-Euler/test/Problem014.test.js
@@ -0,0 +1,15 @@
+import { expect } from 'vitest'
+import { findLongestCollatzSequence } from '../Problem014.js'
+
+describe('Longest Collatz Sequence', () => {
+  test.each([
+    [2, 1],
+    [13, 9],
+    [1000000, 837799]
+  ])(
+    'if limit is %i, then the Longest Collatz Sequence will be %i',
+    (a, expected) => {
+      expect(findLongestCollatzSequence(a)).toBe(expected)
+    }
+  )
+})