Test failure on CITGM for Node.js 26.6.0

[aduh95]

Bug Description

We're seeing a bunch of error like Cannot find module 'test/fixtures/cache-tests/test-engine/client/runner.mjs' imported from test/cache-interceptor/cache-tests-worker.mjs, e.g. see https://ci.nodejs.org/view/Node.js-citgm/job/citgm-smoker/3748/nodes=aix72-power9/testReport/junit/(root)/citgm/undici_v8_9_0/

Reproduction

N/A

Steps to reproduce (if not using the script above):

CITGM

Expected Behavior

Test suite passes

Actual Behavior

Test failures

Logs & Screenshots

Environment

• OS:
• Node.js version:
• undici version:

Additional context