System Testing vs Integration Testing | How Do They Stack Up?

One of the most common keywords which trend online related to software testing is " system testing vs integration testing ". In this blog post, we will talk about everything about them and how they stack together.

System Testing

System testing is a type of testing that's performed before the software is released to the public. It's used to test the entire application, not just one particular feature. System testing is typically performed by developers and QA engineers who have access to your source code as well as your production environment (the environment where your customers will be using your product). The goal of system testing is not only to ensure that all parts of an application work properly but also that they interact correctly with each other and other parts of the system.

Integrate Testing 

Integrate testing is sometimes considered an intermediate form of testing. Integration testing is a form of unit testing and is performed after individual pieces of functionality have been developed as well as before they are put into production within a build. This ensures that all code is developed, tested, and deployed into production in an automated way. Integration testing is a specific type of unit testing and often takes place after individual pieces of functionality have been developed as well as before they are put into production within a build. Integration tests verify that all the necessary parts work together, including data exchange between components and across multiple pages. This can be done at various levels, including:

  • Components – making sure that when you use your component to pass information from one page to another, it does so without error or delay in processing time
  • Pages – ensuring that when you click on an element on one page (like an image or button), it appears correctly on other pages without having to reload everything.

System Testing vs Integration Testing

For most automated testing tools, system testing is a preferred form of testing. This is how they stack up to each other:

  • They're more thorough than integration tests. Integration tests usually cover only some pieces of functionality; they don't cover all aspects of the application or how it interacts with other components in your environment (for example, database connections). System-level tests can simulate user interactions across multiple components and scenarios to identify any potential problems before they become actual issues for users.
  • They're more efficient than integration tests because they focus on finding bugs that might surface during normal operation rather than after changes have been made to code assets or an entire team has been involved in making changes before deploying them onto production servers (which can be time-consuming). On average, an automated test suite takes about 3 times longer than manual code reviews do.
  • The goal of system testing is not only to ensure that all parts of an application work properly but also that they interact correctly with each other and other parts of the system.
  • System testing provides coverage for all code paths through the application. In other words, this means that you can't just make changes to one part of your app and expect them to be reflected in another part.
  • System tests are a more comprehensive form of testing than integration tests because they attempt to simulate as many user scenarios as possible within a given environment (i.e., on different devices). 
  • System tests also tend to take longer than integration tests because they have more code paths, which means there's more work involved in executing them and validating results afterward.
  • System testing is a more thorough form of testing that focuses on the system as a whole. It can be done at any time, but it's typically done after development has finished and before QA begins integration testing. In contrast to integration testing, which focuses on the software in its final state (with all features enabled), system testing strives to test every corner of your software and mimic the end-users actions as closely as possible.
  • System tests are more expensive than integration tests because they require more effort from testers who are familiar with both functionalities and environments—but they're also much more valuable because they allow you to catch any unforeseen issues or problems before your product reaches customers.
  • System testing has a higher risk of throwing errors that are outside your control, but it may lead to faster bug fixes.
  • Integration testing is a good way to ensure that all code is developed and tested in an automated way. Integration testing has proven itself to be more cost-effective and effective than system testing. The main advantage of integration testing is that it can be done at a lower cost, with fewer resources and less risk. System testing requires frequent changes in the codebase which may require more time and money than just running through a few test cases manually.
  • Integration tests also have an added advantage when it comes to scaling: if you have multiple teams working on different parts of your product, then each team will need its own set of integration tests for each piece they are working on—this can become quite expensive very quickly! This problem can be solved by having one central place where all these tests reside so that anyone who wants access (or change) them doesn't have any trouble finding what they need when needed most.


Before we conclude our blog post on the keywords “system testing vs integration testing”, we can sum up by stating that the two methods are not mutually exclusive, so both systems should be used for maximum effectiveness. System testing is a more thorough approach that can take several weeks to complete. Integration testing, on the other hand, is faster and less expensive. It's also more effective since it doesn't rely on the same amount of data collection and analysis as system testing does (and therefore doesn't require as much time).

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