Hi @shahanaznatasha, congrats on your Practitioner certification.
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For the Test run executions on TestOps agents using Katalon Runtime Engine, you will need to set an agent and run an execution via TestOps (not Studio). See this guide: Finding it hard to meet some certification criteria? Then read this topic!
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For the visual testing requirements, try to use take-screenshot keywords in your tests in Katalon Studio.
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For the TestCloud tunnel, try to set up and run an execution through TestOps, not Studio: Finding it hard to meet some certification criteria? Then read this topic!
Hope these help.