test: continue normalizing fixtures use

PR-URL: https://github.com/nodejs/node/pull/14716
Refs: https://github.com/nodejs/node/pull/14332


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>