ServiceNow upgrades can be complex and risky due to the system's versatility and broad testing requirements. Automated testing, suggested by Tricentis, provides a reliable strategy to manage this by offering immediate feedback and long-term testing efficiency. Key steps include detailed planning with prioritization of impactful system areas, development of automated tests at various stages, execution strategies for efficient defect identification, and ongoing maintenance to adapt tests with system evolution. Additional considerations for upgrades ensure a seamless transition by comparing baseline tests with the new version, alongside utilizing ServiceNow's preview features and maintaining open communication within teams.

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