MFA Testing Guide: How to Design Secure Multi-Factor Authentication Test Cases
Before you answer that, let’s take a simple scenario: you enter a password, receive an OTP via SMS or authenticator app, complete verification, and gain access. That confirms the happy path works, but it says nothing about how your multi-factor authentication holds up against invalid inputs, expired tokens, brute-force attempts, MFA bypass techniques, and session edge cases. These are the exact conditions where authentication failures occur in production. Testing MFA security means going beyond the happy path. Whether you’re a QA engineer validating authentication flows or a security tester probing for vulnerabilities, structured MFA testing is how you confirm that access control works exactly as designed, not just under ideal conditions, but under the ones that actually matter. In this guide, you’ll learn what that is, why it’s important, which MFA test scenarios to cover, and how to create test cases that corroborate multi-factor authentication flows effectively. Wh...