Invalid CEN header

[dicolasi]

Summary

Stryker job fails in Gitlab with the following error:

An unexpected error ocurred: Error: Invalid CEN header (bad signature)

Stryker config

{
"$schema": "./node_modules/@stryker-mutator/core/schema/stryker-schema.json",
"packageManager": "npm",
"reporters": [
"clear-text"
],
"mutate": [
"src/conversion/build-exchange-content-package.js",
"src/directory-processing/collate-directory.js",
"src/conversion/build-kong-package.js",
"src/conversion/convert-config-to-kongfig.js"
],
"commandRunner": {
"command": "npm run test:unit"
},
"timeoutMS": 60000,
"testRunner": "mocha",
"mochaOptions": {
"spec": ["test/unit/**/*.test.ts"],
"require": ["ts-node/register"]
}
}

**Test runner config**

**Stryker environment**

@stryker-mutator/core@7.1.1
@stryker-mutator/mocha-runner@7.1.1
mocha@10.2.0

**Test runner environment**

```shell
# stryker run

Your Environment

https://hub.docker.com/layers/library/node/lts-alpine3.17/images/sha256-667b1cc7a038a4bbfeb9852e1bfe9bd956e10215092b076d968c62a673d5b773?context=explore
gitlab-runner 15.8.1

Add stryker.log

$ npm run test:mutation
> @dwp/exchange-publish@0.0.0 test:mutation
> stryker run
12:26:53 (92) INFO ProjectReader Found 4 of 1364 file(s) to be mutated.
12:26:53 (92) INFO Instrumenter Instrumented 4 source file(s) with 474 mutant(s)
12:26:54 (92) INFO ConcurrencyTokenProvider Creating 15 test runner process(es).
12:26:56 (92) INFO DryRunExecutor Starting initial test run (mocha test runner with "perTest" coverage analysis). This may take a while.
12:27:20 ([92](https://gitlab.com/dwp/integration/api-exchange/publishing-tools/-/jobs/4868332434#L92)) ERROR DryRunExecutor One or more tests failed in the initial test run:
	Business documentation validation should validate well-formed document
		An unexpected error ocurred: Error: Invalid CEN header (bad signature)
12:27:20 (92) ERROR Stryker There were failed tests in the initial test run.
Cleaning up project directory and file based variables
00:01