Which @angular/* package(s) are the source of the bug?

compiler-cli, upgrade

Is this a regression?

Yes

Description

after upgrading to angular 13 when run ng test --code-coverage
Error: Module not found: Error: Can't resolve 'core-js/proposals/reflect-metadata'

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in (run ng version)

Angular CLI: 13.1.2
Node: 14.15.1
Package Manager: npm 6.14.8
OS: win32 x64

Anything else?

No response