PHPUnit - 获取Mock时没有消息的错误

I try to use PHPUnit (with codeception, but codeception isn't at fault here) to get a Mock of an Exception and an error is thrown with getMock() with no error message (I only gave a stackTrace).

I launch the command via PHPStorm, here si to command as it appeared in console C:\php-7.3.1\php.exe C:/Users/Etshy/AppData/Local/Temp/ide-codeception.php run --report -o "reporters: report: PhpStorm_Codeception_ReportPrinter" --no-ansi --no-interaction tests\unit\Http\ClientTest.php:testRequest404

And here is the results:

Codeception PHP Testing Framework v3.0.1
Powered by PHPUnit 8.2-g24fc15955 by Sebastian Bergmann and contributors.
Running with seed: 


 D:\PhpStormProjects\imgur-php-wrapper\vendor\doctrine\instantiator\src\Doctrine\Instantiator\Instantiator.php:70
 D:\PhpStormProjects\imgur-php-wrapper\vendor\doctrine\instantiator\src\Doctrine\Instantiator\Instantiator.php:59
 D:\PhpStormProjects\imgur-php-wrapper\tests\unit\Http\ClientTest.php:101
 C:\Users\Etshy\AppData\Local\Temp\ide-codeception.php:40



Time: 390 ms, Memory: 12.00 MB

There was 1 error:

---------

ERRORS!
Tests: 1, Assertions: 0, Errors: 1.

Process finished with exit code 1

Here is the getMock call that cause this

$exception = $this->getMockBuilder(ClientException::class)
            ->disableOriginalConstructor()
            ->getMock();

I also tried with the CodeCeption method make() and makeEmpty() with exact same error (that's why I tried doing it directly with PHPUnit methods later, wihtout success).

ClientException is the GuzzleHttp\Exception\ClientException.

There is only Mock object creation before that.

Anyone have an idea what's the cause of the error ? I can't figure it.