diff --git a/package.json b/package.json
index ea979cd..25a3023 100644
--- a/package.json
+++ b/package.json
@@ -15,10 +15,12 @@
   "license": "Apache-2.0",
   "devDependencies": {
     "@types/chai": "^4.2.22",
+    "@types/chai-as-promised": "^7.1.4",
     "@types/mime-types": "^2.1.1",
     "@types/mocha": "^9.0.0",
     "@types/node": "^14.14.37",
     "chai": "^4.3.4",
+    "chai-as-promised": "^7.1.1",
     "cross-env": "^7.0.3",
     "mocha": "^9.1.3",
     "prettier": "^2.4.1",
diff --git a/tests/encrypt.test.ts b/tests/encrypt.test.ts
index 0977b41..072e53b 100644
--- a/tests/encrypt.test.ts
+++ b/tests/encrypt.test.ts
@@ -1,6 +1,7 @@
 import * as fs from "fs";
 import * as path from "path";
-import { expect } from "chai";
+import * as chai from "chai";
+import chaiAsPromised from "chai-as-promised";
 import { base64ToBase32, bufferToArrayBuffer } from "../src/misc";
 import {
   decryptArrayBuffer,
@@ -9,6 +10,9 @@ import {
   encryptStringToBase32,
 } from "../src/encrypt";
 
+chai.use(chaiAsPromised);
+const expect = chai.expect;
+
 describe("Encryption tests", () => {
   beforeEach(function () {
     global.window = {
@@ -22,6 +26,14 @@ describe("Encryption tests", () => {
     expect(await encryptStringToBase32(k, password)).to.not.equal(k);
   });
 
+  it("should raise error using different password", async () => {
+    const k = "secret text";
+    const password = "hey";
+    const password2 = "hey2";
+    const enc = await encryptStringToBase32(k, password);
+    await expect(decryptBase32ToString(enc, password2)).to.be.rejected;
+  });
+
   it("should encrypt and decrypt string and get the same result returned", async () => {
     const k = "jfkkjkjbce7983ycdeknkkjckooAIUHIDIBIE((*BII)njD/d/dd/d/sjxhux";
     const password = "hfiuibec989###oiu982bj1`";