🔐 Login Page Testing Checklist

When you think of a login page, it might seem like a small, simple part of an app—just two fields and a button, right? But don’t let that fool you. This tiny screen is a user's first interaction with your app, and it acts as the gatekeeper to the entire experience.

So, how do we make sure it's working perfectly? By testing it like a pro. Below are the top test scenarios every QA should run to make sure the login page is smooth, secure, and user-friendly.

✅ 1. Field Validation

Before even trying to log in, let’s make sure the fields behave properly:

• What happens if email or password is left empty?
• Does it catch invalid email like test@ or [email protected]?
• Is there a minimum or maximum password length?
• Does it ignore spaces at the beginning or end?
• What happens if someone enters unsupported or special characters?

👉 Why it matters: We want clean, valid input going to the system—and helpful feedback when it’s not.

🔒 2. Right vs Wrong Credentials

Now let's check if login is working like it should:

• Correct email and password → logs in smoothly
• Correct email but wrong password → shows a helpful error
• Typing an email that doesn’t exist → shows a general error like “Your email or password is incorrect”
• Test if the password field is case-sensitive
• Try logging in multiple times with wrong info—does it show a lockout or a captcha?

👉 Why it matters: Logging in should be secure, but not confusing.

👁️ 3. Password Visibility Toggle

We all make typos—especially on phones. That’s where the eye icon comes in:

• Password is hidden by default
• Tapping the eye shows the password
• Toggling visibility doesn’t alter the password input

👉 Why it matters: Users should feel secure, but also in control.

🌍 4. Multi-language Support

If your app supports more than one language (like English and Arabic), check this:

• Labels, buttons, and error messages appear in the correct language
• Text alignment flips correctly (LTR vs RTL)
• Icons and buttons shift positions when switching languages

👉 Why it matters: Everyone deserves a smooth login, no matter their language.

📱 5. Mobile Responsiveness

Your login page should work on all screen sizes:

• Looks great on phones, tablets, and desktops
• Buttons and inputs are easy to tap
• Keyboard doesn’t block the fields
• Scrolling works smoothly on small screens

👉 Why it matters: Many users log in from their phones first.

🧠 6. Helpful Feedback

No one likes confusing errors. Let’s make messages clear and kind:

• Errors are easy to understand (not just “Error 400”)
• Red borders or icons help highlight issues
• Errors disappear when users fix the problem
• Show a spinner or loading icon during login

👉 Why it matters: Let users know what's going on without making them guess.

🛡️ 7. Security Basics

Even simple login forms can be targeted. Let’s make them safe:

• Blocks things like SQL injections and XSS
• Rate-limits repeated login attempts (to prevent brute-force attacks)
• The page uses HTTPS (no exceptions!)

👉 Why it matters: Your login page is the front door—keep it locked tight.

🔄 8. Session & Flow

After logging in, does everything behave?

• Redirects to the correct dashboard or page
• Doesn’t allow logging in twice unnecessarily
• Automatically logs out the user after a period of inactivity (if applicable)
• Opens a new session properly

👉 Why it matters: Clean session handling avoids confusion and bugs.

🔗 9. Links & Connected Features

Check that everything around the login works too:

• “Forgot password?” link works and leads to the right flow
• “Remember Me” keeps users logged in as expected
• Social logins (like Google/Apple) function smoothly
• Users are taken back to where they were trying to go

👉 Why it matters: These features make life easier—and they need to work.
 

💬 Final Thoughts

The login screen might look small, but it carries a lot of responsibility. It’s where trust starts. So as testers, we need to make sure it works beautifully—every single time.

🛠️ Pro Tip: Grab the free checklist here and keep it handy during login testing. It’ll save time, reduce bugs, and help your whole team stay consistent.

If you're working on a login flow now, feel free to use this list as your guide—or share it with your team.