System under test

System under test (SUT) refers to a system that is being tested for correct operation. According to ISTQB it is the test object.[1][2][3] The term is used mostly in software testing.

A special case of a software system is an application which, when tested, is called an application under test.

The term SUT means also a stage of maturity of the software because a system test is the successor of integration test in the testing cycle.

See also


  1. "ISTQB Glossary". Retrieved 2018-02-05.
  2. "Don't Stub the System Under Test". Retrieved 2018-02-05.
  3. "SUT (system under test)". (in German). Retrieved 2018-02-05.

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