Difference Between System and Integration Testing

System testing is a level of testing where the application as a whole is tested for its compliance to functional and non-functional requirements.
Whereas, in integration testing, we test the interfacing between the modules which are interconnected with each other.

Let’s now see the difference between the two –

System TestingIntegration Testing
In system testing, we check the system as a whole.In integration testing, we check the interfacing between the inter-connected components.
It is performed after integration testing.It is performed after unit testing.
It is carried out for performing both functional and non-functional testing(performance, usability, etc).It is generally limited to functional aspects of the integrated components.
Since the testing is limited to the evaluation of functional requirements, hence, it includes black-box testing techniques only.Since the interfacing logic is required to perform this testing, hence, it requires white/grey box testing techniques along with black-box techniques.
The different types of system testing are- Functional testing, Performance testing, Usability testing, Reliability testing, Security testing, Scalability testing, Installation testing, etc.The different approaches of performing integration testing namely – Top-down, bottom-up, big-bang and hybrid integration.


For details on system and integration testing documents and their templates, check our tutorials – System Testing and Integration Testing. Also, check our complete Software Testing Tutorial.

Leave a Comment