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.

Check the infographic below for a quick recap.

Difference between system and integration testing

More Difference Between

Manual vs Automation TestingSmoke vs Sanity Testing
White-box vs Black-box TestingSystem vs Integration Testing
Verification vs ValidationQuality Assurance vs Quality Control
SDLC vs STLCTest Plan vs Test Strategy
Test Case vs Test ScenarioAgile vs Waterfall Model
Agile vs Scrum MethodologyREST vs SOAP Web Service
Web Application vs Desktop ApplicationWeb Service vs Website
Assert vs VerifyError, Defect, Fault, Failure & Bug


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

Leave a Comment