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System under test

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System under test (SUT) --also Subject Under Test-- refers to a system that is being tested for correct operation. 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

References