"Squirrels bury nuts to prepare for winter. They will go back and uncover them to keep a fresh memory of their location and to check the integrity of the nut."

Testing4success... where qa is second nature

Regression, Sanity and Smoke testing overview

Regression testing is an approach to ensure that the existing functionality of the software has not been compromised by changes in the code. Any defects found during a Regression test that only appeared after the code had changed are referred to as regressions. A regression test is normally built from a sub-set of existing functional test cases. A Smoke test is done to make sure that the critical functionalities of the software are working correctly. Whereas a Sanity test is performed to check that only newly added functionality is working correctly.

when is Regression, Sanity and Smoke testing performed?

Regression testing is performed towards the end of the development lifecycle's testing phase, after Functional testing is complete and associated defects have been fixed. However, a Regression test can be carried out after any large change to the application, for example a new feature. Normally, a single Regression test is performed. But, if a large number of issues are detected, then subsequent rounds of Regression testing can be implemented. Sanity testing and Smoke testing is predominantly carried out prior to deployment to provide confidence that no obvious issues are present. After release, Regression and/or Smoke and Sanity testing can also be used in association with updates and hot-fixes.

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our Regression, Sanity and Smoke testing process

Our QA team will provide you with ongoing communication every step of the way, ensuring that the Regression, Sanity and Smoke testing is efficient and effective. The process diagram below will give you an idea of how Regression testing would typically work. If you have any questions, just let us know!

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One-time QA

One-Time QA

We will work with you to create a customised and highly effective one-time QA solution that perfectly fits your requirements and budget.

Ad-hoc QA

Ad-Hoc  QA

A flexible approach that ensures you have professional QA only when you need it, eliminating scheduling worries and unnecessary costs.

Continuous QA

Continuous QA

Our professional team of expert testers can fit into your existing development process and provide continuous QA for your app.

Why outsource to Testing4Success?

Functional testing

No minimum hours requirement

Whether you need QA for 1 hour or 100 hours, the choice is up to you. We are totally flexible.

Compatibility testing

Highly experienced testers

All of our testers are either senior or expert level, ensuring you get the best experience.

Test case design

Canada-based qa team

Our entire QA team including all testers and Test Managers are based within Canada.

Regression testing

5 star rated qa service

We are proud to hold a 5 Star rating on clutch.co along with many outstanding testimonials.

Usability testing

SCalable qa team

We can easily add or remove testers as your requirements change during a project.

QA Support

no cost for delays

Project delays? that's no problem, you only pay for the actual testing carried out.


We are proud to hold a 100% 5 Star rating on Clutch.co!
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Financial Services

"The dedication to quality and the ability to seek out solutions without being explicitly directed is what I continually find impressive about T4S."

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"The attention to detail which T4S exhibited was awesome. They went above and beyond to test edge cases and use cases which we had not thought of."

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Input logic

Digital App Agency

"They have offered high-quality QA testing, and they customize it based on our client’s needs. They uncovered many edge cases and were very easy to work with."

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Millennium communications


"No matter the request, T4S provide the quality testing services we need at a reasonable price."

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Mud wtr


"Very little was required on my end to gain such value. Fast, efficient, and with great communication. I can't see how it could have gone any easier. "

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Fertility Focus


"Rapid interaction and quick resolution. Testing4Success have provided the best match for our requirements, fast response and good value"

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