What can be rolled out to production without testing?

Only very minor changes that do not affect business logic and functionality, such as:

• Updates to documentation or website texts.
• Changes in configuration files that do not impact the service operation.
• Corrections of typos in the UI not related to code.

However, even such changes are better tested in test environments to avoid unexpected consequences. Generally, any changes affecting functionality, security, or performance should undergo testing before release.