vscode-jest activates for all roots in a multi-root workspace if any folder contains jest-related files. When it activates on folders that don't have jest files, it spams a bunch of error messages.
Don't show errors on roots where there are no jest files.
Shows errors on roots that don't use jest.

It seems like only way to reduce scope would be to exhaustively list all folders where Jest should be disabled with jest.disabledWorkspaceFolders - there鈥檚 no way to specify a whitelist of folders where Jest should run (which would be better).
While this feature is definitely nice to have, it is the expected behavior for the current implementation: instead of doing a deep search for jest files on each folder, it took a simpler approach by providing a customize-option... As the error panel indicated above, you can skip these folders by adding "jest.disabledWorkspaceFolders": ['interviews', 'deploy-sourcegraph'] to .vscode/settings.json or the equivalent.
PR is welcome.