diff --git a/bin/pest b/bin/pest
index bae7b4eb..e99c09bb 100755
--- a/bin/pest
+++ b/bin/pest
@@ -17,6 +17,7 @@ use Symfony\Component\Console\Output\OutputInterface;
     $_SERVER['COLLISION_PRINTER'] = 'DefaultPrinter';
 
     $args = $_SERVER['argv'];
+
     $dirty = false;
     $todo = false;
 
@@ -68,11 +69,11 @@ use Symfony\Component\Console\Output\OutputInterface;
 
     // Get $rootPath based on $autoloadPath
     $rootPath = dirname($autoloadPath, 2);
-    $argv = new ArgvInput();
+    $input = new ArgvInput();
 
     $testSuite = TestSuite::getInstance(
         $rootPath,
-        $argv->getParameterOption('--test-directory', (new ConfigLoader($rootPath))->getTestsDirectory()),
+        $input->getParameterOption('--test-directory', (new ConfigLoader($rootPath))->getTestsDirectory()),
     );
 
     if ($dirty) {
@@ -83,19 +84,13 @@ use Symfony\Component\Console\Output\OutputInterface;
         $testSuite->tests->addTestCaseMethodFilter(new TodoTestCaseFilter());
     }
 
-    $isDecorated = $argv->getParameterOption('--colors', 'always') !== 'never';
+    $isDecorated = $input->getParameterOption('--colors', 'always') !== 'never';
 
     $output = new ConsoleOutput(ConsoleOutput::VERBOSITY_NORMAL, $isDecorated);
 
-    $container = Container::getInstance();
-    $container->add(TestSuite::class, $testSuite);
-    $container->add(OutputInterface::class, $output);
-    $container->add(InputInterface::class, $argv);
-    $container->add(Container::class, $container);
+    $kernel = Kernel::boot($testSuite, $input, $output);
 
-    $kernel = Kernel::boot();
-
-    $result = $kernel->handle($output, $args);
+    $result = $kernel->handle($args);
 
     $kernel->shutdown();
 
diff --git a/bin/pest-wrapper.php b/bin/worker.php
similarity index 79%
rename from bin/pest-wrapper.php
rename to bin/worker.php
index 7972b206..ca6e84c6 100644
--- a/bin/pest-wrapper.php
+++ b/bin/worker.php
@@ -7,37 +7,31 @@ use ParaTest\WrapperRunner\WrapperWorker;
 use Pest\ConfigLoader;
 use Pest\Kernel;
 use Pest\Plugins\Actions\CallsHandleArguments;
-use Pest\Support\Container;
 use Pest\TestCaseMethodFilters\TodoTestCaseFilter;
 use Pest\TestSuite;
 use Symfony\Component\Console\Input\ArgvInput;
-use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\ConsoleOutput;
 use Symfony\Component\Console\Output\OutputInterface;
 
 $bootPest = (static function (): void {
-    $argv = new ArgvInput();
-    $parentProcessArgv = new ArgvInput(json_decode($_SERVER['PEST_PARALLEL_ARGV']));
+    $workerArgv = new ArgvInput();
+    $masterArgv = new ArgvInput(json_decode($_SERVER['PEST_PARALLEL_ARGV']));
 
     $rootPath = dirname(PHPUNIT_COMPOSER_INSTALL, 2);
-    $testSuite = TestSuite::getInstance(
-        $rootPath,
-        $argv->getParameterOption('--test-directory', (new ConfigLoader($rootPath))->getTestsDirectory()),
-    );
+    $testSuite = TestSuite::getInstance($rootPath, $workerArgv->getParameterOption(
+        '--test-directory',
+        (new ConfigLoader($rootPath))->getTestsDirectory()
+    ));
 
-    if ($parentProcessArgv->hasParameterOption('--todo')) {
+    if ($masterArgv->hasParameterOption('--todo')) {
         $testSuite->tests->addTestCaseMethodFilter(new TodoTestCaseFilter());
     }
 
+    $input = new ArgvInput();
+
     $output = new ConsoleOutput(OutputInterface::VERBOSITY_NORMAL, true);
 
-    $container = Container::getInstance();
-    $container->add(TestSuite::class, $testSuite);
-    $container->add(OutputInterface::class, $output);
-    $container->add(InputInterface::class, $argv);
-    $container->add(Container::class, $container);
-
-    Kernel::boot();
+    Kernel::boot($testSuite, $input, $output);
 });
 
 (static function () use ($bootPest): void {
@@ -104,10 +98,10 @@ $bootPest = (static function (): void {
         $testPath = fgets(STDIN);
         if ($testPath === false || $testPath === WrapperWorker::COMMAND_EXIT) {
             $application->end();
+
             exit;
         }
 
-        // It must be a 1 byte string to ensure filesize() is equal to the number of tests executed
         $exitCode = $application->runTest(trim($testPath));
 
         fwrite($statusFile, (string) $exitCode);
diff --git a/composer.json b/composer.json
index 66776cef..d4598946 100644
--- a/composer.json
+++ b/composer.json
@@ -46,7 +46,7 @@
         ]
     },
     "require-dev": {
-        "brianium/paratest": "^7.0.4",
+        "brianium/paratest": "^7.0.5",
         "pestphp/pest-dev-tools": "^2.4.0",
         "pestphp/pest-plugin-arch": "^2.0.0",
         "symfony/process": "^6.2.5"
diff --git a/phpstan.neon b/phpstan.neon
index cb50f844..a75d68cc 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -12,9 +12,10 @@ parameters:
     reportUnmatchedIgnoredErrors: true
 
     ignoreErrors:
+        - "#Language construct isset\\(\\) should not be used.#"
+        - "#is not allowed to extend#"
         - "#with a nullable type declaration#"
         - "#type mixed is not subtype of native#"
-        - "#is not allowed to extend#"
         - "# with null as default value#"
         - "#has parameter \\$closure with default value.#"
         - "#has parameter \\$description with default value.#"
diff --git a/src/Kernel.php b/src/Kernel.php
index 39c0fd66..3914418e 100644
--- a/src/Kernel.php
+++ b/src/Kernel.php
@@ -11,7 +11,7 @@ use Pest\Plugins\Actions\CallsBoot;
 use Pest\Plugins\Actions\CallsShutdown;
 use Pest\Support\Container;
 use PHPUnit\TextUI\Application;
-use PHPUnit\TextUI\Exception;
+use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 
 /**
@@ -36,7 +36,8 @@ final class Kernel
      * Creates a new Kernel instance.
      */
     public function __construct(
-        private readonly Application $application
+        private readonly Application $application,
+        private readonly OutputInterface $output,
     ) {
         register_shutdown_function(function (): void {
             if (error_get_last() !== null) {
@@ -50,8 +51,16 @@ final class Kernel
     /**
      * Boots the Kernel.
      */
-    public static function boot(): self
+    public static function boot(TestSuite $testSuite, InputInterface $input, OutputInterface $output): self
     {
+        $container = Container::getInstance();
+
+        $container
+            ->add(TestSuite::class, $testSuite)
+            ->add(InputInterface::class, $input)
+            ->add(OutputInterface::class, $output)
+            ->add(Container::class, $container);
+
         foreach (self::BOOTSTRAPPERS as $bootstrapper) {
             $bootstrapper = Container::getInstance()->get($bootstrapper);
             assert($bootstrapper instanceof Bootstrapper);
@@ -61,24 +70,25 @@ final class Kernel
 
         (new CallsBoot())->__invoke();
 
-        return new self(new Application());
+        return new self(
+            new Application(),
+            $output,
+        );
     }
 
     /**
-     * Handles the given argv.
+     * Runs the application, and returns the exit code.
      *
-     * @param  array<int, string>  $argv
-     *
-     * @throws Exception
+     * @param  array<int, string>  $args
      */
-    public function handle(OutputInterface $output, array $argv): int
+    public function handle(array $args): int
     {
-        $argv = (new Plugins\Actions\CallsHandleArguments())->__invoke($argv);
+        $args = (new Plugins\Actions\CallsHandleArguments())->__invoke($args);
 
         try {
-            $this->application->run($argv);
+            $this->application->run($args);
         } catch (NoTestsFound) {
-            $output->writeln([
+            $this->output->writeln([
                 '',
                 '  <fg=white;options=bold;bg=blue> INFO </> No tests found.',
                 '',
diff --git a/src/Plugins/Parallel.php b/src/Plugins/Parallel.php
index 7a959afe..07a48587 100644
--- a/src/Plugins/Parallel.php
+++ b/src/Plugins/Parallel.php
@@ -4,11 +4,12 @@ declare(strict_types=1);
 
 namespace Pest\Plugins;
 
+use JsonException;
 use ParaTest\ParaTestCommand;
 use Pest\Contracts\Plugins\HandlesArguments;
 use Pest\Plugins\Actions\CallsAddsOutput;
 use Pest\Plugins\Concerns\HandleArguments;
-use Pest\Plugins\Parallel\Contracts\HandlesSubprocessArguments;
+use Pest\Plugins\Parallel\Contracts\HandlersWorkerArguments;
 use Pest\Plugins\Parallel\Paratest\CleanConsoleOutput;
 use Pest\Support\Arr;
 use Pest\Support\Container;
@@ -31,7 +32,11 @@ final class Parallel implements HandlesArguments
 
     public static function isInParallelProcess(): bool
     {
-        return (int) Arr::get($_SERVER, 'PARATEST') === 1;
+        $argvValue = Arr::get($_SERVER, 'PARATEST');
+
+        assert(is_string($argvValue) || is_int($argvValue) || is_null($argvValue));
+
+        return ((int) $argvValue) === 1;
     }
 
     public function handleArguments(array $arguments): array
@@ -41,12 +46,15 @@ final class Parallel implements HandlesArguments
         }
 
         if (self::isInParallelProcess()) {
-            return $this->runSubprocessHandlers($arguments);
+            return $this->runWorkersHandlers($arguments);
         }
 
         return $arguments;
     }
 
+    /**
+     * @param  array<int, string>  $arguments
+     */
     private function argumentsContainParallelFlags(array $arguments): bool
     {
         if ($this->hasArgument('--parallel', $arguments)) {
@@ -56,6 +64,11 @@ final class Parallel implements HandlesArguments
         return $this->hasArgument('-p', $arguments);
     }
 
+    /**
+     * @param  array<int, string>  $arguments
+     *
+     * @throws JsonException
+     */
     private function runTestSuiteInParallel(array $arguments): int
     {
         if (! class_exists(ParaTestCommand::class)) {
@@ -64,16 +77,16 @@ final class Parallel implements HandlesArguments
             return Command::FAILURE;
         }
 
-        $_ENV['PEST_PARALLEL_ARGV'] = json_encode($_SERVER['argv']);
+        $_ENV['PEST_PARALLEL_ARGV'] = json_encode($_SERVER['argv'], JSON_THROW_ON_ERROR);
 
         $handlers = array_filter(
-            array_map(fn ($handler) => Container::getInstance()->get($handler), self::HANDLERS),
-            fn ($handler) => $handler instanceof HandlesArguments,
+            array_map(fn ($handler): object|string => Container::getInstance()->get($handler), self::HANDLERS),
+            fn ($handler): bool => $handler instanceof HandlesArguments,
         );
 
         $filteredArguments = array_reduce(
             $handlers,
-            fn ($arguments, HandlesArguments $handler) => $handler->handleArguments($arguments),
+            fn ($arguments, HandlesArguments $handler): array => $handler->handleArguments($arguments),
             $arguments
         );
 
@@ -82,23 +95,30 @@ final class Parallel implements HandlesArguments
         return (new CallsAddsOutput())($exitCode);
     }
 
-    private function runSubprocessHandlers(array $arguments): array
+    /**
+     * @param  array<int, string>  $arguments
+     * @return array<int, string>
+     */
+    private function runWorkersHandlers(array $arguments): array
     {
         $handlers = array_filter(
-            array_map(fn ($handler) => Container::getInstance()->get($handler), self::HANDLERS),
-            fn ($handler) => $handler instanceof HandlesSubprocessArguments,
+            array_map(fn ($handler): object|string => Container::getInstance()->get($handler), self::HANDLERS),
+            fn ($handler): bool => $handler instanceof HandlersWorkerArguments,
         );
 
         return array_reduce(
             $handlers,
-            fn ($arguments, HandlesSubprocessArguments $handler) => $handler->handleSubprocessArguments($arguments),
+            fn ($arguments, HandlersWorkerArguments $handler): array => $handler->handleWorkerArguments($arguments),
             $arguments
         );
     }
 
     private function askUserToInstallParatest(): void
     {
-        Container::getInstance()->get(OutputInterface::class)->writeln([
+        /** @var OutputInterface $output */
+        $output = Container::getInstance()->get(OutputInterface::class);
+
+        $output->writeln([
             '<fg=red>Pest Parallel requires ParaTest to run.</>',
             'Please run <fg=yellow>composer require --dev brianium/paratest</>.',
         ]);
@@ -106,7 +126,10 @@ final class Parallel implements HandlesArguments
 
     private function paratestCommand(): Application
     {
-        $command = ParaTestCommand::applicationFactory(TestSuite::getInstance()->rootPath);
+        /** @var non-empty-string $rootPath */
+        $rootPath = TestSuite::getInstance()->rootPath;
+
+        $command = ParaTestCommand::applicationFactory($rootPath);
         $command->setAutoExit(false);
         $command->setName('Pest');
         $command->setVersion(version());
diff --git a/src/Plugins/Parallel/Contracts/HandlersWorkerArguments.php b/src/Plugins/Parallel/Contracts/HandlersWorkerArguments.php
new file mode 100644
index 00000000..f953ecb7
--- /dev/null
+++ b/src/Plugins/Parallel/Contracts/HandlersWorkerArguments.php
@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Plugins\Parallel\Contracts;
+
+interface HandlersWorkerArguments
+{
+    /**
+     * @param  array<int, string>  $arguments
+     * @return array<int, string>
+     */
+    public function handleWorkerArguments(array $arguments): array;
+}
diff --git a/src/Plugins/Parallel/Contracts/HandlesSubprocessArguments.php b/src/Plugins/Parallel/Contracts/HandlesSubprocessArguments.php
deleted file mode 100644
index 4fb08457..00000000
--- a/src/Plugins/Parallel/Contracts/HandlesSubprocessArguments.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Pest\Plugins\Parallel\Contracts;
-
-interface HandlesSubprocessArguments
-{
-    public function handleSubprocessArguments(array $arguments): array;
-}
diff --git a/src/Plugins/Parallel/Handlers/Laravel.php b/src/Plugins/Parallel/Handlers/Laravel.php
index 665494fa..838f1480 100644
--- a/src/Plugins/Parallel/Handlers/Laravel.php
+++ b/src/Plugins/Parallel/Handlers/Laravel.php
@@ -11,8 +11,6 @@ use ParaTest\RunnerInterface;
 use Pest\Contracts\Plugins\HandlesArguments;
 use Pest\Plugins\Concerns\HandleArguments;
 use Pest\Plugins\Parallel\Paratest\WrapperRunner;
-use Symfony\Component\Console\Command\Command;
-use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 
 /**
@@ -22,13 +20,6 @@ final class Laravel implements HandlesArguments
 {
     use HandleArguments;
 
-    public function __construct(
-        private readonly OutputInterface $output,
-        private readonly InputInterface $input,
-    )
-    {
-    }
-
     public function handleArguments(array $arguments): array
     {
         if (! self::isALaravelApplication()) {
@@ -44,22 +35,22 @@ final class Laravel implements HandlesArguments
 
     private function setLaravelParallelRunner(): void
     {
-        if (! method_exists(ParallelRunner::class, 'resolveRunnerUsing')) {
-            $this->output->writeln('  <fg=red>Using parallel with Pest requires Laravel v8.55.0 or higher.</>');
-            exit(Command::FAILURE);
-        }
-
-        ParallelRunner::resolveRunnerUsing(fn (Options $options, OutputInterface $output): RunnerInterface => new WrapperRunner($options, $output));
+        ParallelRunner::resolveRunnerUsing( // @phpstan-ignore-line
+            fn (Options $options, OutputInterface $output): RunnerInterface => new WrapperRunner($options, $output)
+        );
     }
 
     private static function isALaravelApplication(): bool
     {
-        return InstalledVersions::isInstalled('laravel/framework', false)
-            && ! class_exists(\Orchestra\Testbench\TestCase::class);
+        if (! InstalledVersions::isInstalled('laravel/framework', false)) {
+            return false;
+        }
+
+        return ! class_exists(\Orchestra\Testbench\TestCase::class);
     }
 
     /**
-     * @param array<int, string> $arguments
+     * @param  array<int, string>  $arguments
      * @return array<int, string>
      */
     private function setEnvironmentVariables(array $arguments): array
@@ -75,17 +66,18 @@ final class Laravel implements HandlesArguments
         }
 
         $arguments = $this->popArgument('--recreate-databases', $arguments);
+
         return $this->popArgument('--drop-databases', $arguments);
     }
 
     /**
-     * @param array<int, string> $arguments
+     * @param  array<int, string>  $arguments
      * @return array<int, string>
      */
     private function useLaravelRunner(array $arguments): array
     {
         foreach ($arguments as $value) {
-            if (str_starts_with((string)$value, '--runner')) {
+            if (str_starts_with($value, '--runner')) {
                 $arguments = $this->popArgument($value, $arguments);
             }
         }
diff --git a/src/Plugins/Parallel/Handlers/Pest.php b/src/Plugins/Parallel/Handlers/Pest.php
index 75c12557..71b24647 100644
--- a/src/Plugins/Parallel/Handlers/Pest.php
+++ b/src/Plugins/Parallel/Handlers/Pest.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Pest\Plugins\Parallel\Handlers;
 
 use Pest\Contracts\Plugins\HandlesArguments;
 use Pest\Plugins\Concerns\HandleArguments;
-use Pest\Plugins\Parallel\Contracts\HandlesSubprocessArguments;
+use Pest\Plugins\Parallel\Contracts\HandlersWorkerArguments;
 use Pest\Plugins\Retry;
 
-final class Pest implements HandlesArguments, HandlesSubprocessArguments
+final class Pest implements HandlesArguments, HandlersWorkerArguments
 {
     use HandleArguments;
 
@@ -20,7 +22,7 @@ final class Pest implements HandlesArguments, HandlesSubprocessArguments
         return $arguments;
     }
 
-    public function handleSubprocessArguments(array $arguments): array
+    public function handleWorkerArguments(array $arguments): array
     {
         $_SERVER['PEST_PARALLEL'] = '1';
 
diff --git a/src/Plugins/Parallel/Paratest/CleanConsoleOutput.php b/src/Plugins/Parallel/Paratest/CleanConsoleOutput.php
index 91a95023..90858267 100644
--- a/src/Plugins/Parallel/Paratest/CleanConsoleOutput.php
+++ b/src/Plugins/Parallel/Paratest/CleanConsoleOutput.php
@@ -1,13 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Pest\Plugins\Parallel\Paratest;
 
 use Symfony\Component\Console\Output\ConsoleOutput;
 
-class CleanConsoleOutput extends ConsoleOutput
+final class CleanConsoleOutput extends ConsoleOutput
 {
     /**
-     * @inheritdoc
+     * {@inheritdoc}
      */
     protected function doWrite(string $message, bool $newline): void
     {
diff --git a/src/Plugins/Parallel/Paratest/WrapperRunner.php b/src/Plugins/Parallel/Paratest/WrapperRunner.php
index 13eb1737..8d100f98 100644
--- a/src/Plugins/Parallel/Paratest/WrapperRunner.php
+++ b/src/Plugins/Parallel/Paratest/WrapperRunner.php
@@ -37,7 +37,9 @@ use function unlink;
 use function unserialize;
 use function usleep;
 
-/** @internal */
+/**
+ * @internal
+ */
 final class WrapperRunner implements RunnerInterface
 {
     private const CYCLE_SLEEP = 10000;
@@ -46,36 +48,36 @@ final class WrapperRunner implements RunnerInterface
 
     private readonly Timer $timer;
 
-    /** @var non-empty-string[] */
+    /** @var array<int, string> */
     private array $pending = [];
 
-    private int $exitcode = -1;
+    private int $exitCode = -1;
 
-    /** @var array<positive-int,WrapperWorker> */
+    /** @var array<int,WrapperWorker> */
     private array $workers = [];
 
     /** @var array<int,int> */
     private array $batches = [];
 
-    /** @var list<SplFileInfo> */
+    /** @var array<int, SplFileInfo> */
     private array $testresultFiles = [];
 
-    /** @var list<SplFileInfo> */
+    /** @var array<int, SplFileInfo> */
     private array $coverageFiles = [];
 
-    /** @var list<SplFileInfo> */
+    /** @var array<int, SplFileInfo> */
     private array $junitFiles = [];
 
-    /** @var list<SplFileInfo> */
+    /** @var array<int, SplFileInfo> */
     private array $teamcityFiles = [];
 
-    /** @var list<SplFileInfo> */
+    /** @var array<int, SplFileInfo> */
     private array $testdoxFiles = [];
 
-    /** @var non-empty-string[] */
+    /** @var array<int, string> */
     private readonly array $parameters;
 
-    private CodeCoverageFilterRegistry $codeCoverageFilterRegistry;
+    private readonly CodeCoverageFilterRegistry $codeCoverageFilterRegistry;
 
     public function __construct(
         private readonly Options $options,
@@ -84,11 +86,11 @@ final class WrapperRunner implements RunnerInterface
         $this->printer = new ResultPrinter($output, $options);
         $this->timer = new Timer();
 
-        $wrapper = realpath(
-            dirname(__DIR__, 4).DIRECTORY_SEPARATOR.'bin'.DIRECTORY_SEPARATOR.'pest-wrapper.php',
+        $worker = realpath(
+            dirname(__DIR__, 4).DIRECTORY_SEPARATOR.'bin'.DIRECTORY_SEPARATOR.'worker.php',
         );
 
-        assert($wrapper !== false);
+        assert($worker !== false);
         $phpFinder = new PhpExecutableFinder();
         $phpBin = $phpFinder->find(false);
         assert($phpBin !== false);
@@ -99,7 +101,7 @@ final class WrapperRunner implements RunnerInterface
             $parameters = array_merge($parameters, $options->passthruPhp);
         }
 
-        $parameters[] = $wrapper;
+        $parameters[] = $worker;
 
         $this->parameters = $parameters;
         $this->codeCoverageFilterRegistry = new CodeCoverageFilterRegistry();
@@ -113,6 +115,7 @@ final class WrapperRunner implements RunnerInterface
 
         TestResultFacade::init();
         EventFacade::seal();
+
         $suiteLoader = new SuiteLoader($this->options, $this->output, $this->codeCoverageFilterRegistry);
         $this->pending = $this->getTestFiles($suiteLoader);
 
@@ -159,7 +162,7 @@ final class WrapperRunner implements RunnerInterface
                 }
 
                 if (
-                    $this->exitcode > 0
+                    $this->exitCode > 0
                     && $this->options->configuration->stopOnFailure()
                 ) {
                     $this->pending = [];
@@ -177,7 +180,7 @@ final class WrapperRunner implements RunnerInterface
 
     private function flushWorker(WrapperWorker $worker): void
     {
-        $this->exitcode = max($this->exitcode, $worker->getExitCode());
+        $this->exitCode = max($this->exitCode, $worker->getExitCode());
         $this->printer->printFeedback(
             $worker->progressFile,
             $this->teamcityFiles,
@@ -191,7 +194,7 @@ final class WrapperRunner implements RunnerInterface
         while ($this->workers !== []) {
             foreach ($this->workers as $index => $worker) {
                 if ($worker->isRunning()) {
-                    if (! isset($stopped[$index]) && $worker->isFree()) {
+                    if (! array_key_exists($index, $stopped) && $worker->isFree()) {
                         $worker->stop();
                         $stopped[$index] = true;
                     }
@@ -213,16 +216,22 @@ final class WrapperRunner implements RunnerInterface
 
     private function startWorker(int $token): WrapperWorker
     {
+        /** @var array<non-empty-string> $parameters */
+        $parameters = $this->parameters;
+
         $worker = new WrapperWorker(
             $this->output,
             $this->options,
-            $this->parameters,
+            $parameters,
             $token,
         );
+
         $worker->start();
+
         $this->batches[$token] = 0;
 
         $this->testresultFiles[] = $worker->testresultFile;
+
         if (isset($worker->junitFile)) {
             $this->junitFiles[] = $worker->junitFile;
         }
@@ -349,7 +358,7 @@ final class WrapperRunner implements RunnerInterface
         );
     }
 
-    /** @param  list<SplFileInfo>  $files */
+    /** @param  array<int, SplFileInfo>  $files */
     private function clearFiles(array $files): void
     {
         foreach ($files as $file) {
@@ -362,23 +371,29 @@ final class WrapperRunner implements RunnerInterface
     }
 
     /**
-     * We are doing this because the SuiteLoader returns filenames incorrectly
-     * for Pest tests. Ideally we should find a cleaner solution.
+     * Returns the test files to be executed.
+     *
+     * @return array<int, string>
      */
     private function getTestFiles(SuiteLoader $suiteLoader): array
     {
         $this->debug(sprintf('Found %d test file%s', count($suiteLoader->files), count($suiteLoader->files) === 1 ? '' : 's'));
 
-        $phpunitTests = array_filter(
-            $suiteLoader->files,
-            fn (string $filename): bool => ! str_ends_with($filename, "eval()'d code")
-        );
+        /** @var array<string, string> $files */
+        $files = $suiteLoader->files;
 
-        $pestTests = TestSuite::getInstance()->tests->getFilenames();
-
-        return [...$phpunitTests, ...$pestTests];
+        return [
+            ...array_values(array_filter(
+                $files,
+                fn (string $filename): bool => ! str_ends_with($filename, "eval()'d code")
+            )),
+            ...TestSuite::getInstance()->tests->getFilenames(),
+        ];
     }
 
+    /**
+     * Prints a debug message.
+     */
     private function debug(string $message): void
     {
         if ($this->options->verbose) {
diff --git a/src/Repositories/TestRepository.php b/src/Repositories/TestRepository.php
index d505b883..d698fbd8 100644
--- a/src/Repositories/TestRepository.php
+++ b/src/Repositories/TestRepository.php
@@ -54,22 +54,22 @@ final class TestRepository
      */
     public function getFilenames(): array
     {
-        $testCases = array_filter($this->testCases, static fn(TestCaseFactory $testCase): bool => $testCase->methodsUsingOnly() !== []);
+        $testCases = array_filter($this->testCases, static fn (TestCaseFactory $testCase): bool => $testCase->methodsUsingOnly() !== []);
 
         if ($testCases === []) {
             $testCases = $this->testCases;
         }
 
-        return array_values(array_map(static fn(TestCaseFactory $factory): string => $factory->filename, $testCases));
+        return array_values(array_map(static fn (TestCaseFactory $factory): string => $factory->filename, $testCases));
     }
 
     /**
      * Uses the given `$testCaseClass` on the given `$paths`.
      *
-     * @param array<int, string> $classOrTraits
-     * @param array<int, string> $groups
-     * @param array<int, string> $paths
-     * @param array<int, Closure> $hooks
+     * @param  array<int, string>  $classOrTraits
+     * @param  array<int, string>  $groups
+     * @param  array<int, string>  $paths
+     * @param  array<int, Closure>  $hooks
      */
     public function use(array $classOrTraits, array $groups, array $paths, array $hooks): void
     {
@@ -126,18 +126,18 @@ final class TestRepository
     public function set(TestCaseMethodFactory $method): void
     {
         foreach ($this->testCaseFilters as $filter) {
-            if (!$filter->accept($method->filename)) {
+            if (! $filter->accept($method->filename)) {
                 return;
             }
         }
 
         foreach ($this->testCaseMethodFilters as $filter) {
-            if (!$filter->accept($method)) {
+            if (! $filter->accept($method)) {
                 return;
             }
         }
 
-        if (!array_key_exists($method->filename, $this->testCases)) {
+        if (! array_key_exists($method->filename, $this->testCases)) {
             $this->testCases[$method->filename] = new TestCaseFactory($method->filename);
         }
 
@@ -149,12 +149,12 @@ final class TestRepository
      */
     public function makeIfNeeded(string $filename): void
     {
-        if (!array_key_exists($filename, $this->testCases)) {
+        if (! array_key_exists($filename, $this->testCases)) {
             return;
         }
 
         foreach ($this->testCaseFilters as $filter) {
-            if (!$filter->accept($filename)) {
+            if (! $filter->accept($filename)) {
                 return;
             }
         }
@@ -167,12 +167,12 @@ final class TestRepository
      */
     private function make(TestCaseFactory $testCase): void
     {
-        $startsWith = static fn(string $target, string $directory): bool => Str::startsWith($target, $directory . DIRECTORY_SEPARATOR);
+        $startsWith = static fn (string $target, string $directory): bool => Str::startsWith($target, $directory.DIRECTORY_SEPARATOR);
 
         foreach ($this->uses as $path => $uses) {
             [$classOrTraits, $groups, $hooks] = $uses;
 
-            if ((!is_dir($path) && $testCase->filename === $path) || (is_dir($path) && $startsWith($testCase->filename, $path))) {
+            if ((! is_dir($path) && $testCase->filename === $path) || (is_dir($path) && $startsWith($testCase->filename, $path))) {
                 foreach ($classOrTraits as $class) {
                     /** @var string $class */
                     if (class_exists($class)) {
diff --git a/src/Subscribers/EnsureTeamCityEnabled.php b/src/Subscribers/EnsureTeamCityEnabled.php
index 5da91a70..bd6b1bf2 100644
--- a/src/Subscribers/EnsureTeamCityEnabled.php
+++ b/src/Subscribers/EnsureTeamCityEnabled.php
@@ -21,8 +21,8 @@ final class EnsureTeamCityEnabled implements ConfiguredSubscriber
      * Creates a new Configured Subscriber instance.
      */
     public function __construct(
-        private readonly OutputInterface $output,
         private readonly InputInterface $input,
+        private readonly OutputInterface $output,
         private readonly TestSuite $testSuite,
     ) {
     }
diff --git a/src/Support/Container.php b/src/Support/Container.php
index 3afa9818..af15d003 100644
--- a/src/Support/Container.php
+++ b/src/Support/Container.php
@@ -47,10 +47,14 @@ final class Container
 
     /**
      * Adds the given instance to the container.
+     *
+     * @return $this
      */
-    public function add(string $id, object|string $instance): void
+    public function add(string $id, object|string $instance): self
     {
         $this->instances[$id] = $instance;
+
+        return $this;
     }
 
     /**
diff --git a/src/Support/StateGenerator.php b/src/Support/StateGenerator.php
index 21bd1794..7d06b7b4 100644
--- a/src/Support/StateGenerator.php
+++ b/src/Support/StateGenerator.php
@@ -23,12 +23,15 @@ final class StateGenerator
         $state = new State();
 
         foreach ($testResult->testErroredEvents() as $testResultEvent) {
-            assert($testResultEvent instanceof Errored);
-            $state->add(\NunoMaduro\Collision\Adapters\Phpunit\TestResult::fromTestCase(
-                $testResultEvent->test(),
-                TestResult::FAIL,
-                $testResultEvent->throwable()
-            ));
+            if ($testResultEvent instanceof Errored) {
+                $state->add(TestResult::fromTestCase(
+                    $testResultEvent->test(),
+                    TestResult::FAIL,
+                    $testResultEvent->throwable()
+                ));
+            } else {
+                $state->add(TestResult::fromBeforeFirstTestMethodErrored($testResultEvent));
+            }
         }
 
         foreach ($testResult->testFailedEvents() as $testResultEvent) {
diff --git a/tests/.snapshots/Failure.php.inc b/tests/.snapshots/Failure.php.inc
index 6e04c2ba..e69de29b 100644
--- a/tests/.snapshots/Failure.php.inc
+++ b/tests/.snapshots/Failure.php.inc
@@ -1,24 +0,0 @@
-##teamcity[testSuiteStarted name='Tests/tests/Failure' locationHint='file://tests/.tests/Failure.php' flowId='1234']
-##teamcity[testStarted name='it can fail with comparison' locationHint='pest_qn://tests/.tests/Failure.php::it can fail with comparison' flowId='1234']
-##teamcity[testFailed name='it can fail with comparison' message='Failed asserting that true matches expected false.' details='at src/Mixins/Expectation.php:342|nat src/Support/ExpectationPipeline.php:75|nat src/Support/ExpectationPipeline.php:79|nat src/Expectation.php:300|nat tests/.tests/Failure.php:6|nat src/Factories/TestCaseMethodFactory.php:105|nat src/Concerns/Testable.php:262|nat src/Support/ExceptionTrace.php:28|nat src/Concerns/Testable.php:262|nat src/Concerns/Testable.php:217|nat src/Kernel.php:79' type='comparisonFailure' actual='true' expected='false' flowId='1234']
-##teamcity[testFinished name='it can fail with comparison' duration='100000' flowId='1234']
-##teamcity[testStarted name='it can be ignored because of no assertions' locationHint='pest_qn://tests/.tests/Failure.php::it can be ignored because of no assertions' flowId='1234']
-##teamcity[testIgnored name='it can be ignored because of no assertions' message='This test did not perform any assertions' details='' flowId='1234']
-##teamcity[testFinished name='it can be ignored because of no assertions' duration='100000' flowId='1234']
-##teamcity[testStarted name='it can be ignored because it is skipped' locationHint='pest_qn://tests/.tests/Failure.php::it can be ignored because it is skipped' flowId='1234']
-##teamcity[testIgnored name='it can be ignored because it is skipped' message='This test was ignored.' details='' flowId='1234']
-##teamcity[testFinished name='it can be ignored because it is skipped' duration='100000' flowId='1234']
-##teamcity[testStarted name='it can fail' locationHint='pest_qn://tests/.tests/Failure.php::it can fail' flowId='1234']
-##teamcity[testFailed name='it can fail' message='oh noo' details='at tests/.tests/Failure.php:18|nat src/Factories/TestCaseMethodFactory.php:105|nat src/Concerns/Testable.php:262|nat src/Support/ExceptionTrace.php:28|nat src/Concerns/Testable.php:262|nat src/Concerns/Testable.php:217|nat src/Kernel.php:79' flowId='1234']
-##teamcity[testFinished name='it can fail' duration='100000' flowId='1234']
-##teamcity[testStarted name='it is not done yet' locationHint='pest_qn://tests/.tests/Failure.php::it is not done yet' flowId='1234']
-##teamcity[testIgnored name='it is not done yet' message='This test was ignored.' details='' flowId='1234']
-##teamcity[testFinished name='it is not done yet' duration='100000' flowId='1234']
-##teamcity[testStarted name='build this one.' locationHint='pest_qn://tests/.tests/Failure.php::build this one.' flowId='1234']
-##teamcity[testIgnored name='build this one.' message='This test was ignored.' details='' flowId='1234']
-##teamcity[testFinished name='build this one.' duration='100000' flowId='1234']
-##teamcity[testSuiteFinished name='Tests/tests/Failure' flowId='1234']
-
-  Tests:    2 failed, 1 risky, 2 todos, 1 skipped (2 assertions)
-  Duration: 1.00s
-
diff --git a/tests/.snapshots/success.txt b/tests/.snapshots/success.txt
index cce6c952..6ab35fd6 100644
--- a/tests/.snapshots/success.txt
+++ b/tests/.snapshots/success.txt
@@ -896,6 +896,9 @@
    PASS  Tests\Visual\Help
   ✓ visual snapshot of help command output
 
+   PASS  Tests\Visual\Parallel
+  ✓ parallel
+
    PASS  Tests\Visual\SingleTestOrDirectory
   ✓ allows to run a single test
   ✓ allows to run a directory
@@ -914,4 +917,4 @@
    PASS  Tests\Visual\Version
   ✓ visual snapshot of help command output
 
-  Tests:    4 incomplete, 4 todos, 18 skipped, 633 passed (1552 assertions)
\ No newline at end of file
+  Tests:    4 incomplete, 4 todos, 18 skipped, 634 passed (1554 assertions)
\ No newline at end of file
diff --git a/tests/Visual/Parallel.php b/tests/Visual/Parallel.php
new file mode 100644
index 00000000..5b622870
--- /dev/null
+++ b/tests/Visual/Parallel.php
@@ -0,0 +1,18 @@
+<?php
+
+use Symfony\Component\Process\Process;
+
+$run = function () {
+    $process = new Process(['php', 'bin/pest', '--parallel', '--processes=3', '--exclude-group=integration'], dirname(__DIR__, 2),
+        ['COLLISION_PRINTER' => 'DefaultPrinter', 'COLLISION_IGNORE_DURATION' => 'true'],
+    );
+
+    $process->run();
+
+    return preg_replace('#\\x1b[[][^A-Za-z]*[A-Za-z]#', '', $process->getOutput());
+};
+
+test('parallel', function () use ($run) {
+    expect($run())->toContain('Running 650 tests using 3 processes')
+        ->toContain('Tests:    4 incomplete, 4 todos, 15 skipped, 627 passed (1546 assertions)');
+});