diff --git a/Ciphers/test/VigenereCipher.test.js b/Ciphers/test/VigenereCipher.test.js
new file mode 100644
index 0000000000..de8618b8cd
--- /dev/null
+++ b/Ciphers/test/VigenereCipher.test.js
@@ -0,0 +1,13 @@
+import { encrypt, decrypt } from '../VigenereCipher'
+
+test('Hello world! === dcrypt(encrypt(Hello world!))', () => {
+  const word = 'Hello world!'
+  const result = decrypt(encrypt(word, 'code'), 'code')
+  expect(result).toMatch(word)
+})
+
+test('The Algorithms === dcrypt(encrypt(The Algorithms))', () => {
+  const word = 'The Algorithms'
+  const result = decrypt(encrypt(word, 'code'), 'code')
+  expect(result).toMatch(word)
+})