qualities of a good tester

10 Must Have Qualities Of A Good Tester

Last updated on

Are you new to the software testing field or looking to switch careers and move to testing? Or you are a pro at software testing but still want to see what all qualities of a good software tester you already possess. If you belong to any of the above three categories then you landed at the right place.

Hey guys! I am a software testing professional with experience in handling complex projects in Big-data, Machine learning, E-commerce, and the education domain. With over 10 years of experience in different forms of testing, today I have compiled a list of 10 must-have qualities that a Software Tester must possess. So, let’s get started.

1. Empathy With Customer Or End-User

empathy quality

According to me, the first and foremost quality that a tester must possess is empathy with the client, customer or the end-user. By empathy I mean, the tester should put himself in the shoes of the end-user of the application.

Instead of focusing on the “what is going to be developed” part, a tester should focus on “how it is going to be used” part. You should always have the bigger picture in mind about the usage of the application. Who will use it? How will they use it? What is the technical expertise of the end-user? Is the application really user-friendly?

As a QA you should always have these questions in mind.

2. Be A Hardcore Pessimist

Pessimist quality

Well, this may come as a surprise to you but believe me it is one of the most important traits that a tester should have.

In order to create robust and good quality software, as a tester, you should scrutinize every design, every flow, and every possible handling of input data. Always believe in Murphy’s law – “Anything that can go wrong will go wrong”.

3. Domain Knowledge

Domain knowledge

Projects belonging to many industries like – Banking, Life Insurance, E-commerce etc only consider testers with domain knowledge or give them preference over others.

Having a domain knowledge of the application greatly helps in testing. If you know the domain well, you know the application and customer well. This, in turn, helps in the first quality that we discussed – empathizing with the customer.

4. Technical Skills

Technical skill

A good tester should have good technical expertise and it is not limited to just Test Automation, Performance Testing, and Security testing professionals. Those who are working on a black box or functional testing also must possess good technical skills.

To see why this quality is important, just try to find the answer to this question – “Which Tester has a better chance of delivering a better quality application or finding more bugs? One who has expertise in Databases and can check the data type of the different fields. Moreover, can check their length limit and different relationships between the tables.
Or the one with no knowledge of DB? Of course the one with the DB expertise.

Database knowledge is just one of the skills. If you have knowledge of automation tools like Selenium, an understanding of APIs, Client-Server architecture, networking, etc, or any other technical skill, you will have an edge over others.

5. Attention To Details

Attention to detail quality

Attention to detail helps us in identifying the issues that often get missed due to oversight. Since everyone can find an obvious issue but it requires an eagle’s eye to find the one that might not be present in plain-sight.

6. Push Every Aspect Of The Application To Its Limits

Push application to limits

Have you heard of Stress testing, Spike testing, Volume testing, Monkey testing? The common thing between these types of testing is – these types of testing push the application to its limits. Be it in terms of load, suddenly increasing the number of users, or using large files for processing or using roughly.

A tester with this quality can find different bottlenecks in the application that are otherwise hard to find while following the normal application flow.

7. Never Assume Or Take Anything For Granted

Never assume

This is one of the qualities that we tend to lose as we gain more experience. Remember, when we were just starting our careers how meticulously we would read everything, follow everything. Be it test case steps, test data, or any other instruction.

But as we grow, we tend to develop the habit of taking things for granted. Or we subconsciously assume things. As a software tester, we should never assume anything. With respect to testing, we should not take any test case flow or data for granted. So, even if a test case is as obvious as testing a calculator with input data 1+1, we should still test it with the utmost attention.

8. Continuously Strive To Learn New Things

Learn new things

Every new project requires the tester to gain some domain knowledge or technical expertise. Apart from these, there are some projects that belong to different cultures, languages, or geographical locations.

A tester having the zeal to learn new things can adapt to such requirements fairly quickly.

9. Good Interpersonal Skills

Good interpersonal skills

As a tester, we have to deal with different stakeholders of the project – developers, project managers, client representatives, and business analysts.

Having good interpersonal skills make you a good team player. In addition, you become a dependable resource on which others can bank upon for software quality.

10. Good Communication Skills

Good communication skills

Last but not least, having the trait of good communication skills greatly helps in the requirements elicitation phase. Clear and concise questions, when asked to clients, helps in avoiding any gaps in requirements.

Also, a tester with good communication skills can articulate the bugs and scenarios to the developers in a comprehensible way. Thus leading to better and efficient collaboration with the developer team.


Based on my experience, these were some of the qualities that according to me, every tester should have. Depending on the level or designation of the tester and the type of project, there can be several other qualities as well. Like leadership traits for senior-level testers. Or, ability to adapt quickly to changing requirements in the case of agile projects, etc.
This was my list, let me know in the comments, what according to you are the top qualities of a tester.

1 thought on “10 Must Have Qualities Of A Good Tester”

Leave a Comment