test: fix assert.strictEqual

PR-URL: https://github.com/nodejs/node/pull/24619


Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>