Fix unit test to pass on Windows #392

Job	Run time
Quality control	39s
PHP-Linter (8.3) / linter	10s
Linter / yaml-linter	4s
Linter / json-linter	23s
Linter / ecmascript-linter	15s
PHP-Linter (8.5) / linter	14s
PHP-Linter (8.4) / linter	10s
Linter / style-linter	0s
Unit tests, PHP 8.4, windows-latest	1m 7s
Unit tests, PHP 8.3, windows-latest	1m 7s
Unit tests, PHP 8.3, ubuntu-latest	22s
Unit tests, PHP 8.4, ubuntu-latest	19s
Unit tests, PHP 8.5, ubuntu-latest	25s
Unit tests, PHP 8.5, windows-latest	1m 3s
Security checks	25s
Code coverage	12s
Cleanup artifacts	3s
	6m 58s

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