[Bug]: Pest 4.0.2: missing implementations in StateGenerator.php

What Happened

time vendor/bin/sail php vendor/bin/pest --stop-on-defect --stop-on-error --stop-on-failure --stop-on-risky --passthru-php="-derror_log=/tmp/php.log" --parallel

...............................................................................................................................................................

Tests: 159 passed (841 assertions)
Duration: 2.40s
Parallel: 16 processes

real 0m3,742s
user 0m0,250s
sys 0m0,189s

Processing finishes successfully, but only 159 tests are executed instead of 2.7k.

So the workers are mostly crashing, due to:

tail -f /tmp/php.log
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89
[22-Aug-2025 14:59:43 UTC] PHP Warning:  Undefined array key "testdox-columns" in /var/www/html/vendor/pestphp/pest/bin/worker.php on line 89

Update: After fixing worker.php, tests are still not completely executed.

How to Reproduce

pest --parallel

Sample Repository

No response

Pest Version

4.0.2

PHP Version

8.4.11

Operation System

Linux

Notes

No response

Start by running pest --parallel with Pest 4.0.2 and inspect the warning at worker.php line 89, then read StateGenerator.php for the missing implementations named in the issue. Confirm the fix by verifying that parallel execution runs the full test suite rather than only 159 tests.