How QA Engineers Can Find Better Test Use Cases from Requirements

Hi Reader,

Happy New Year 2026.

I am probably late to share the New Year wishes to the folks on my email newsletter, today I got some free time being a holiday. I will try to write more often in 2026, once or twice a week.

One QA engineer replied to my welcome email and said:

“I need to learn how to find correct and different use cases from the requirement.”

Honestly, this is something almost every QA engineer struggles with at some point.

Not because testing is hard.
But because requirements are confusing.

The Problem Is Not Writing Test Cases

Most of us know how to write test cases.

The real problem is:
👉 What test cases should I write?

When we read a requirement, we usually think:

“Okay, this feature should work. Let me test that.”

And we stop there.

That’s why bugs escape.

How Good Testers Read Requirements

Good testers don’t read requirements like a document.
They read them like a curious user.

They keep asking small questions in their head.

Step 1: Ask “Why is this feature needed?”

Before testing anything, ask:

Why was this feature built?
Who will use it?
What problem does it solve?

If you don’t know this, you’ll only test the surface.

Step 2: Split One Requirement into Small Pieces

One requirement is never just one test.

Look for:

Correct input
Wrong input
Empty input
Very small or very big values

Each one is a different use case.

Step 3: Think Like a Real User (Not a Perfect One)

Real users:

Skip steps
Make mistakes
Click twice
Close the app midway

So ask:

What if the user does this wrong?
What if they stop in the middle?
What if they repeat the same action?

These are very common bugs.

Step 4: Don’t Forget Failure Scenarios

Things don’t always work perfectly.

Think about:

Internet is slow or lost
App crashes
Session expires
Data already exists

Most production issues come from here.

A Simple Checklist You Can Use

Whenever you read a requirement, quickly check:

✔️ Normal flow
✔️ Wrong input
✔️ Empty input
✔️ User mistakes
✔️ Failure cases

If you do this every time, your test coverage will automatically improve.

Final Thought

Finding good use cases is not magic.

It’s just asking better questions.

Once you build this habit, requirements will stop feeling scary.

I will write a few email articles about coding questions you can practice as beginners, stay tuned for the next emails over this weekend.

Let's meet in next email

- Swaroop Nadella | LinkedIn

P.S. I’ll keep sharing short, practical stories and tips often in this email newsletter - no spam, only things that help you as a QA engineer.

You can read my previous email articles published here.

Swaroop Nadella