Why does DevOps recommend shift-left testing principles?

DevOps is a common method in the world of technology that mixes development with the likes of IT operations. Following “shift-left testing principles” is one of the most common suggestions. But “why does DevOps recommend shift-left testing principles?” Let us now explore what it is with a detailed explanation.

What do Shift-left Testing Principles mean?

The practice of putting testing tasks and processes early in the software development lifecycle (SDLC), closer to the start of the development process, is commonly known as shift-left testing principles. The main goal is to discover and resolve any error found as soon as possible. This lower the overall chances of issues spreading into the later phase of development or reaching the production system.

What Does Shift-Left in DevOps Mean?

“Shift-left” refers to the idea of dealing with requirements that normally can be seen later in the building process during an earlier stage. Here the main objective is to improve software quality, productivity, and interaction between different teams that make up the creation and delivery process.

The phrase “shift-left” refers to the software development life cycle timeline being shown as a left-to-right movement. Here, development is on the left, and production is on the right. Due to this, businesses are able to tackle possible risks early in the development process by moving tasks to the left side.

Why Shift-Testing Principles are Recommended by DevOps

The following are the main reasons why DevOps supports shift-left testing:

Early Bug Detection

Shift-left testing involves adding testing closer to the start of the software development lifecycle. As a result, testers can find faults and issues early in the development process. This early bug finding is essential for the following reasons:

Avoiding Escalation: Catching defects early in the development cycle avoids them from rising into bigger problems later in the development cycle or, worse, reaching the production system. It lowers the danger of serious delays and outages which could happen if key flaws are found later in the development or production process.

Lower Fixing Costs: Generally, fixing errors early in the development process is less time-consuming and costly than addressing them later. Early detection helps developers to take care of bugs while the code is still new in their thoughts and before moving on to other aspects of the project.

Improved Feedback Loop

Another key benefit of shift-left testing is that it creates a faster feedback loop in the development process. These are some benefits that can be seen with faster feedback loop:

Agile Iterations: More agile development iterations are possible thanks to early testing and faster feedback. Developers can get immediate feedback on their code changes while making changes as necessary. This agility especially helps in the delivery of continuous software upgrades with higher quality.

Cooperation Efficiency: The quick feedback loop increases greater unity among developers, testers, as well as other stakeholders. Early and regular testing makes it less difficult to exchange ideas, detect possible issues, and focus on project goals.

Improved Teamwork

Shifting testing to the left of the flow can very much improve the overall teamwork within teams and those who are working in the development process.

Common responsibility: When testing takes place early and regularly, all team members experience a feeling of common responsibility for the product’s quality. Developers become more aware of the importance of creating robust code, and reviewers work together closely with devs to create successful test cases.

Multifunctional Group: Shift-left testing helps break through sections in a DevOps setting where communication between development, testing, and operations teams is key. It allows teams with different functions to share ideas, understand each other’s difficulties, and work together to achieve their common goal of producing a high-quality product.

Reduction in Cost and Time

Shifting testing to the left reduces costs and saves time throughout the development process.

Early Issue Solution: Detecting and correcting problems early saves time and effort spent on repair and troubleshooting. This results in cost savings and speeds the whole development process.

Fewer Production Errors: Handling possible problems early reduces the number of errors that reach the production setting. As a result, the time and resources necessary for post-release maintenance and support are significantly reduced.

Improved Software Quality

Finally, shift-left testing leads to higher software quality.

Increased User Satisfaction: Delivering software with fewer issues and problems results in higher customer satisfaction and a better user experience.

Better Reputation: Consistently providing high-quality software improves the development teams and the organization’s overall reputation.

Better Credibility: Development teams are more confident in the reliability and stability of the product they offer when they use shift-left testing practices.

How to Use Shift Left within a DevOps Environment

Shift Left Principles are simple to include in any DevOps workflow.

Take part in QA activities with developers

To make sure all code samples are tested ahead of being added to the main branch, testers, and developers can work together. This helps to fix errors before they have a chance to impact other sections of the code and makes sure quality is at the ground level.

Include testers early on in the development process

When testers have a role from the very first sessions, Shift Left works at its best. Understanding the design and development process of the app lets testers plan ahead using the Continuous Testing method and focus on any design flaws.

Give testers some coding experience

It is good for developers to be aware of testing, and vice versa, for DevOps. Despite the fact that neither group is believed to be highly skilled in these jobs, the fact that developers can now do simple tests and QAs can help in some fast changes increases the total delivery speed.


In summary, the reason “why does DevOps recommend shift-left testing principle” is to improve software quality as well as increase the delivery speed with the culture of teamwork and continuous improvement in the development and testing team. For a better explanation, read the answer above.

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