ServiceNow upgrade requires a careful plan covering planning, development, execution, and maintenance phases to mitigate risks and ensure system reliability. Key strategies include adopting test automation for consistency, defining test requirements, prioritizing impactful areas, and ensuring tests are well-organized and maintained. Automated testing reduces human error and increases efficiency, allowing for faster, more reliable upgrades. The guide emphasizes the importance of a strategic approach to testing at all stages, from unit to acceptance testing, and provides checklists for each phase to ensure thorough preparation and execution.

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