[Bug]: pest4 - The test directory [tests/] does not exist

What Happened

Pest does not work after upgrading from pest3 to pest4:

$ vendor/bin/pest --help

   Pest\Exceptions\FatalException

  The test directory [/project/tests/] does not exist.

  at vendor/pestphp/pest/src/Bootstrappers/BootFiles.php:45
     41▕         $rootPath = TestSuite::getInstance()->rootPath;
     42▕         $testsPath = $rootPath.DIRECTORY_SEPARATOR.testDirectory();
     43▕
     44▕         if (! is_dir($testsPath)) {
  ➜  45▕             throw new FatalException(sprintf('The test directory [%s] does not exist.', $testsPath));
     46▕         }
     47▕
     48▕         foreach (self::STRUCTURE as $filename) {
     49▕             $filename = sprintf('%s%s%s', $testsPath, DIRECTORY_SEPARATOR, $filename);


$ vendor/bin/pest --init

   Pest\Exceptions\FatalException

  The test directory [/project/tests/] does not exist.

  at vendor/pestphp/pest/src/Bootstrappers/BootFiles.php:45
     41▕         $rootPath = TestSuite::getInstance()->rootPath;
     42▕         $testsPath = $rootPath.DIRECTORY_SEPARATOR.testDirectory();
     43▕
     44▕         if (! is_dir($testsPath)) {
  ➜  45▕             throw new FatalException(sprintf('The test directory [%s] does not exist.', $testsPath));
     46▕         }
     47▕
     48▕         foreach (self::STRUCTURE as $filename) {
     49▕             $filename = sprintf('%s%s%s', $testsPath, DIRECTORY_SEPARATOR, $filename);

How to Reproduce

1. Delete tests directory - rm -rf tests
2. Run pest binary - vendor/bin/pest --help

Sample Repository

No response

Pest Version

4.0.0

PHP Version

8.4.10

Operation System

macOS, Linux

Notes

No response

Start with vendor/pestphp/pest/src/Bootstrappers/BootFiles.php at the reported directory check and trace how vendor/bin/pest --help and --init reach it. Reproduce the failure after removing tests/, then add regression coverage for both commands. Done means these commands no longer fail solely because tests/ is absent.