After a model update, a previously passing test case now fails. The team is unsure if the failure is due to a real regression in the SUT or a problem with the updated model. The execution log shows the test now takes a different path through the model. What is the most effective way to determine the root cause?

Compare the new test path with the old one, and verify the expected behavior of the new path against the requirements.

Revert the model to the previous version and re-run the test.

Assume the SUT is correct and update the model to match the new behavior.

Mark the test as 'known to fail' and exclude it from the regression suite.

Certified Tester Model-Based Testing

Domain 4Objective 2

Different Kinds of Test Execution CT-MBT Practice Questions (Page 7)

Part of the MBT Test Implementation and Execution domain, which makes up ~16% of our current practice bank. ISTQB does not publish an official question count, but from its 60-minute exam (~25–40 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 31 practice questions to prepare you well beyond it. (estimate)

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Questions 31–31

31expert · hard
After a model update, a previously passing test case now fails. The team is unsure if the failure is due to a real regression in the SUT or a problem with the updated model. The execution log shows the test now takes a different path through the model. What is the most effective way to determine the root cause?
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Different Kinds of Test Execution CT-MBT Practice Questions (Page 7)

Questions 31–31

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