I am currently preparing for the GitHub Copilot certification exam, and I have been practicing with Pass4Future GitHub Copilot practice questions. They are pretty well for testing real-world scenarios. But while using Copilot itself during practice, I noticed that sometimes it gives irrelevant or outdated suggestions, especially when I am working with the latest VS Code updates. It even repeat old code patterns occasionally.
Has anyone else faced this kind of issue while preparing or using Copilot for real projects?
Is there any reliable way to make Copilot understand newer syntax or avoid such outdated completions?
You can reply like this:
Yes, this happens sometimes. Copilot is helpful, but it is not always “up to date” in the way people expect, especially right after VS Code changes, extension changes, or when your workspace context is weak. In VS Code, inline suggestions mainly depend on the current/open files and the model being used, so if the surrounding context is limited, it can fall back to older or more generic patterns. Also, as of VS Code 1.109, the old GitHub Copilot extension was deprecated and the Copilot Chat extension now provides the full experience, so keeping VS Code and the active Copilot extension current really matters.
What helped me was treating Copilot more like a fast assistant than an authority. For newer syntax or framework updates, I get better results when I keep the relevant files open, give very explicit comments before generating code, and switch/check the completions model in VS Code when suggestions feel stale. VS Code also documents that you can change the model used for inline suggestions, and that inline completions use the current and open files as context.
Another useful step is adding repository instructions such as .github/copilot-instructions.md. GitHub and VS Code both support repository-level custom instructions, and VS Code even lets you generate them with /init. That said, one important limitation is that these custom instructions affect chat behavior, not the inline suggestions you get while typing, so they help more with Copilot Chat than with ghost-text completions.
If you are working in a monorepo or opening only a subfolder, also check whether VS Code is discovering your customization files from the parent repo. There is now a setting for that, but it is off by default. Microsoft’s current guidance also leans heavily on “context engineering” with instructions, prompt files, and agents to improve code quality and reduce irrelevant output.
So overall: yes, you are definitely not the only one seeing this. Copilot can still be very useful for exam prep and real projects, but for the newest syntax and APIs, I would always verify its output against current docs and not accept completions blindly.
