diff --git a/.claude/commands/add-php-version.md b/.claude/commands/add-php-version.md
new file mode 100644
index 0000000..338e643
--- /dev/null
+++ b/.claude/commands/add-php-version.md
@@ -0,0 +1,75 @@
+---
+description: Add a new PHP version to CI (DependenciesVersions, Dockerfile, phpstan configs)
+argument-hint: <php-version>
+allowed-tools: [Read, Edit, Write, Glob, Grep, Bash]
+---
+
+Add PHP version **$ARGUMENTS** to the CI pipeline. Follow each step exactly.
+
+## Step 1: Validate input
+
+The argument must be a PHP version like `8.5`. If `$ARGUMENTS` is empty or does not match the pattern `X.Y` (single digit dot single digit), stop and tell the user the correct usage: `/add-php-version 8.5`.
+
+Derive these values from the version `X.Y`:
+- **MAJOR** = X (e.g. `8`)
+- **MINOR** = Y (e.g. `5`)
+- **phpVersion int** = X0Y00 (e.g. `80500`) — pad minor to two digits, append two zeros
+
+## Step 2: Update `bin/DependenciesVersions.php`
+
+Read the file. In the `$this->phpVersions` chain (around line 33-38), add `->add('X.Y')` immediately before `->setReadOnly()`. Follow the existing indentation (16 spaces).
+
+## Step 3: Update `docker/ci/Dockerfile`
+
+Read the file. Find the last `# PHP X.Y` comment block in the `apt-get install` section (the block with `phpX.Y-cli`, `phpX.Y-dom`, `phpX.Y-mbstring`). Add a new block immediately after it with the same pattern:
+
+```
+        # PHP X.Y
+        phpX.Y-cli \
+        phpX.Y-dom \
+        phpX.Y-mbstring \
+```
+
+Make sure the backslash continuation is preserved on the line before the new block.
+
+## Step 4: Create phpstan config files
+
+1. Glob `config/ci/phpstan/php-*.neon` to find all existing Symfony versions in use.
+2. Extract the unique Symfony versions (e.g. `7.0`, `7.1`, `7.2`, `7.3`).
+3. For each Symfony version `Z.A`, create `config/ci/phpstan/php-X.Y.symfony-Z.A.neon` with this exact content (no trailing newline after the last line):
+
+```
+includes:
+    - common.neon
+parameters:
+    phpVersion: <phpVersion int>
+    tmpDir: ../../../var/ci/phpstan/php-X-Y/symfony-Z-A
+```
+
+Where dashes replace dots in directory names (e.g. `php-8-5/symfony-7-0`).
+
+## Step 5: Update `changelog.md`
+
+Read the file. Under the `### master` heading, add a line:
+
+```
+- Add compatibility for PHP X.Y
+```
+
+If similar lines already exist, add it after the last one.
+
+## Step 6: Build Docker image
+
+Run `bin/ci/docker` to rebuild the CI Docker image with the new PHP version. This may take several minutes.
+
+## Step 7: Run CI validation
+
+Run `bin/ci/validate` to verify everything passes. If it fails, fix the errors and re-run until it passes.
+
+## Step 8: Report
+
+List all files that were modified or created.
+
+At the very end, display this reminder message in bold yellow (using markdown):
+
+> **⚠️ Don't forget to push the Docker image: `bin/ci/docker --push`**
diff --git a/.claude/commands/add-symfony-version.md b/.claude/commands/add-symfony-version.md
new file mode 100644
index 0000000..88c5a9b
--- /dev/null
+++ b/.claude/commands/add-symfony-version.md
@@ -0,0 +1,102 @@
+---
+description: Add a new Symfony version to CI (DependenciesVersions, Dockerfile, phpstan configs)
+argument-hint: <symfony-version>
+allowed-tools: [Read, Edit, Write, Glob, Grep, Bash]
+---
+
+Add Symfony version **$ARGUMENTS** to the CI pipeline. Follow each step exactly.
+
+## Step 1: Validate input
+
+The argument must be a Symfony version like `7.4`. If `$ARGUMENTS` is empty or does not match the pattern `X.Y` (single digit dot single digit), stop and tell the user the correct usage: `/add-symfony-version 7.4`.
+
+Derive these values from the version `X.Y`:
+- **MAJOR** = X (e.g. `7`)
+- **MINOR** = Y (e.g. `4`)
+- **ENV suffix** = X_Y (e.g. `7_4`)
+- **dir suffix** = X-Y (e.g. `7-4`)
+
+## Step 2: Update `composer.json`
+
+Read the file. Update the `require` section so that `symfony/console` and `symfony/process` version constraints include the new version X.Y. If the new version is already within the existing constraint range, no change is needed. If adding a new major version (e.g. Y is `0`), add `|| ^X.0` to the constraint — this covers all future minors of that major (e.g. `^8.0` covers 8.0, 8.1, 8.2, etc.). If adding a minor within an existing major, extend the upper bound to cover `X.Y.*` (e.g. change `<8.0.0` to `<X.(Y+1).0`).
+
+## Step 3: Update `bin/DependenciesVersions.php`
+
+Read the file. In the `$this->symfonyVersions` chain, add `->add('X.Y')` immediately before `->setReadOnly()`. Follow the existing indentation (16 spaces).
+
+## Step 4: Update `docker/ci/Dockerfile`
+
+Read the file. Three sections need updating:
+
+### 4a: Add environment variable
+
+Find the last `ENV COMPOSER_HOME_SYMFONY_` line. Add immediately after it:
+
+```
+ENV COMPOSER_HOME_SYMFONY_X_Y=/composer/symfony-X-Y
+```
+
+### 4b: Add composer global require
+
+Find the `# Install Symfony components` section. Add a new line after the last `composer global require` line, following the existing pattern:
+
+```
+    && COMPOSER_HOME=${COMPOSER_HOME_SYMFONY_X_Y} composer global require symfony/process:X.Y.* symfony/console:X.Y.* \
+```
+
+Make sure the backslash continuation is preserved on the previous line.
+
+### 4c: Add cleanup block
+
+Find the last `rm -rf` block for a Symfony version (the one with `COMPOSER_HOME_SYMFONY_`). Add a new block immediately after it, before `&& rm -rf /tmp/*`:
+
+```
+    && rm -rf \
+        ${COMPOSER_HOME_SYMFONY_X_Y}/.htaccess \
+        ${COMPOSER_HOME_SYMFONY_X_Y}/cache \
+        ${COMPOSER_HOME_SYMFONY_X_Y}/composer.json \
+        ${COMPOSER_HOME_SYMFONY_X_Y}/composer.lock \
+```
+
+## Step 5: Create phpstan config files
+
+1. Glob `config/ci/phpstan/php-*.neon` to find all existing PHP versions in use.
+2. Extract the unique PHP versions (e.g. `8.2`, `8.3`, `8.4`, `8.5`).
+3. For each PHP version, derive **phpVersion int** = X0Y00 (e.g. `80200` for `8.2`) — pad minor to two digits, append two zeros.
+4. For each PHP version `P.Q`, create `config/ci/phpstan/php-P.Q.symfony-X.Y.neon` with this exact content (no trailing newline after the last line):
+
+```
+includes:
+    - common.neon
+parameters:
+    phpVersion: <phpVersion int>
+    tmpDir: ../../../var/ci/phpstan/php-P-Q/symfony-X-Y
+```
+
+Where dashes replace dots in directory names (e.g. `php-8-2/symfony-7-4`).
+
+## Step 6: Update `changelog.md`
+
+Read the file. Under the `### master` heading, add a line:
+
+```
+- Add compatibility for Symfony X.Y
+```
+
+If similar lines already exist, add it after the last one.
+
+## Step 7: Build Docker image
+
+Run `bin/ci/docker` to rebuild the CI Docker image with the new Symfony version. This may take several minutes.
+
+## Step 8: Run CI validation
+
+Run `bin/ci/validate` to verify everything passes. If it fails, fix the errors and re-run until it passes.
+
+## Step 9: Report
+
+List all files that were modified or created.
+
+At the very end, display this reminder message in bold yellow (using markdown):
+
+> **⚠️ Don't forget to push the Docker image: `bin/ci/docker --push`**
diff --git a/.gitignore b/.gitignore
index 10ff624..d332144 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+/.claude/settings.local.json
 /var/
 !/var/.gitkeep
 /vendor/
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..821a620
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,60 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+PHP library for running shell processes in parallel with dependency management between them. Built on Symfony Console/Process components. The library itself is used to run its own CI validation (self-dogfooding).
+
+## Common Commands
+
+**Run tests locally (requires PHP 8.2+ and ext-pcntl):**
+```bash
+composer install
+vendor/bin/phpunit -c config/ci/phpunit.xml
+```
+
+**Run full CI validation (runs all checks in parallel using this library itself):**
+```bash
+bin/ci/env          # install dependencies
+bin/ci/validate     # runs phpcs, phpstan, phpunit, composer checks, etc. in parallel
+```
+
+**Run individual CI tools:**
+```bash
+bin/ci/phpcs                # code style (steevanb custom sniffs)
+bin/ci/phpstan              # static analysis (level 9)
+bin/ci/phpunit-coverage     # tests with coverage
+```
+
+CI tests across a matrix: PHP 8.2/8.3/8.4 × Symfony 7.0/7.1/7.2/7.3.
+
+## Architecture
+
+### Core Components
+
+**`ParallelProcessesApplication`** (`src/Console/Application/`) — Main orchestrator. Extends Symfony `SingleCommandApplication`, implements `SignalableCommandInterface`. Uses a fluent builder interface to add processes, configure timeout/refresh interval/max parallel processes, then `run()`. Handles SIGINT for graceful shutdown.
+
+**`Process`** (`src/Process/Process.php`) — Extends Symfony `Process`, implements `ProcessInterface`. Each process has configurable output verbosity levels (standard, error, failure, canceled), a `StartCondition` for dependency management, and cancellation support.
+
+**`StartCondition`** (`src/Process/StartCondition.php`) — Controls when a process can start via three dependency collections:
+- `processesTerminated` — start after these finish (regardless of success/failure)
+- `processesSuccessful` — start only after these succeed
+- `processesFailed` — start only after these fail
+
+**`BootstrapProcess` / `TearDownProcess`** — Special process types. Bootstrap processes automatically become dependencies (via `processesSuccessful`) for all standard processes. TearDown processes automatically wait for all standard processes to terminate.
+
+**Theme system** (`src/Console/Application/Theme/`) — Strategy pattern. `DefaultTheme` shows real-time colored status; `SummaryTheme` shows minimal output (used in CI). Custom themes implement `ThemeInterface`. Selected via `--theme` CLI option.
+
+**`ProcessInterfaceCollection`** — Type-safe collection with filtering: `getReady()`, `getStarted()`, `countRunning()`.
+
+## Code Conventions
+
+- `declare(strict_types=1)` on every file
+- PHP 8.2+ features: constructor property promotion, `readonly`, enums, `#[\Override]` attribute
+- PHPStan level 9 (strictest)
+- Fluent interface pattern (methods return `static`)
+- Interfaces suffixed with `Interface`, no `Abstract` prefix convention
+- Tests: one test class per method, `@covers` annotation required, test directory mirrors `src/` structure
+- PHPUnit config: `config/ci/phpunit.xml` (with coverage), `config/release/phpunit.xml`
+- PHPStan configs: `config/ci/phpstan/` (per PHP/Symfony version combination)
diff --git a/bin/DependenciesVersions.php b/bin/DependenciesVersions.php
index f60df1f..da821cc 100644
--- a/bin/DependenciesVersions.php
+++ b/bin/DependenciesVersions.php
@@ -35,6 +35,7 @@ public function __construct(array $argv)
                 ->add('8.2')
                 ->add('8.3')
                 ->add('8.4')
+                ->add('8.5')
                 ->setReadOnly();
         }
 
@@ -45,6 +46,8 @@ public function __construct(array $argv)
                 ->add('7.1')
                 ->add('7.2')
                 ->add('7.3')
+                ->add('7.4')
+                ->add('8.0')
                 ->setReadOnly();
         }
     }
diff --git a/bin/ci/phpstan b/bin/ci/phpstan
index 819d29a..59ed437 100755
--- a/bin/ci/phpstan
+++ b/bin/ci/phpstan
@@ -13,12 +13,12 @@ clearCache=false
 for arg in "$@"; do
     if [ "${arg:0:6}" == "--php=" ]; then
         phpVersion="${arg:6}"
+        phpstanParameters="${phpstanParameters} ${arg}"
     elif [ "${arg:0:10}" == "--symfony=" ]; then
         symfonyVersion="${arg:10}"
+        phpstanParameters="${phpstanParameters} ${arg}"
     elif [ "${arg}" == "--clear-cache" ]; then
         clearCache=true
-    else
-        phpstanParameters="${phpstanParameters} ${arg}"
     fi
 done
 
@@ -36,6 +36,5 @@ else
         "${PHPSTAN_BIN_PATH}" \
             analyse \
                 --ansi \
-                --configuration config/ci/phpstan/php-"${phpVersion}".symfony-"${symfonyVersion}".neon \
-                ${phpstanParameters}
+                --configuration config/ci/phpstan/php-"${phpVersion}".symfony-"${symfonyVersion}".neon
 fi
diff --git a/bin/ci/phpstan.php b/bin/ci/phpstan.php
index b216aad..21a2d26 100644
--- a/bin/ci/phpstan.php
+++ b/bin/ci/phpstan.php
@@ -14,7 +14,7 @@
 require $rootPath . '/vendor/autoload.php';
 require $rootPath . '/bin/DependenciesVersions.php';
 
-function createPhpstanProcesses($dependenciesVersions): ProcessInterfaceCollection
+function createPhpstanProcesses(DependenciesVersions $dependenciesVersions): ProcessInterfaceCollection
 {
     $return = new ProcessInterfaceCollection();
     foreach ($dependenciesVersions->getPhpVersions()->toArray() as $phpVersion) {
diff --git a/changelog.md b/changelog.md
index 16f413c..61c3aec 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,7 @@
 ### master
 
+- Add compatibility for PHP 8.5, Symfony 7.4 and 8.0
+
 ### [1.1.0](../../compare/1.0.1...1.1.0) - 2025-11-16
 
 - Add `docker` and `docker compose` in `alpine` Docker image
diff --git a/composer.json b/composer.json
index 5554993..85dbb8b 100644
--- a/composer.json
+++ b/composer.json
@@ -13,8 +13,8 @@
         "php": "^8.2",
         "ext-pcntl": "*",
         "steevanb/php-collection": "^6.0",
-        "symfony/console": "^7.0",
-        "symfony/process": "7.0.0 || >=7.1.5 <8.0.0"
+        "symfony/console": "^7.0 || ^8.0",
+        "symfony/process": "7.0.0 || >=7.1.5 <8.0.0 || ^8.0"
     },
     "require-dev": {
         "ext-simplexml": "*",
diff --git a/config/ci/phpstan/php-8.2.symfony-7.4.neon b/config/ci/phpstan/php-8.2.symfony-7.4.neon
new file mode 100644
index 0000000..7dbf4d4
--- /dev/null
+++ b/config/ci/phpstan/php-8.2.symfony-7.4.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80200
+    tmpDir: ../../../var/ci/phpstan/php-8-2/symfony-7-4
diff --git a/config/ci/phpstan/php-8.2.symfony-8.0.neon b/config/ci/phpstan/php-8.2.symfony-8.0.neon
new file mode 100644
index 0000000..f9d4646
--- /dev/null
+++ b/config/ci/phpstan/php-8.2.symfony-8.0.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80200
+    tmpDir: ../../../var/ci/phpstan/php-8-2/symfony-8-0
diff --git a/config/ci/phpstan/php-8.3.symfony-7.4.neon b/config/ci/phpstan/php-8.3.symfony-7.4.neon
new file mode 100644
index 0000000..491efb0
--- /dev/null
+++ b/config/ci/phpstan/php-8.3.symfony-7.4.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80300
+    tmpDir: ../../../var/ci/phpstan/php-8-3/symfony-7-4
diff --git a/config/ci/phpstan/php-8.3.symfony-8.0.neon b/config/ci/phpstan/php-8.3.symfony-8.0.neon
new file mode 100644
index 0000000..8adbd1c
--- /dev/null
+++ b/config/ci/phpstan/php-8.3.symfony-8.0.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80300
+    tmpDir: ../../../var/ci/phpstan/php-8-3/symfony-8-0
diff --git a/config/ci/phpstan/php-8.4.symfony-7.4.neon b/config/ci/phpstan/php-8.4.symfony-7.4.neon
new file mode 100644
index 0000000..f8ed877
--- /dev/null
+++ b/config/ci/phpstan/php-8.4.symfony-7.4.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80400
+    tmpDir: ../../../var/ci/phpstan/php-8-4/symfony-7-4
diff --git a/config/ci/phpstan/php-8.4.symfony-8.0.neon b/config/ci/phpstan/php-8.4.symfony-8.0.neon
new file mode 100644
index 0000000..7124c68
--- /dev/null
+++ b/config/ci/phpstan/php-8.4.symfony-8.0.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80400
+    tmpDir: ../../../var/ci/phpstan/php-8-4/symfony-8-0
diff --git a/config/ci/phpstan/php-8.5.symfony-7.0.neon b/config/ci/phpstan/php-8.5.symfony-7.0.neon
new file mode 100644
index 0000000..e06152b
--- /dev/null
+++ b/config/ci/phpstan/php-8.5.symfony-7.0.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80500
+    tmpDir: ../../../var/ci/phpstan/php-8-5/symfony-7-0
diff --git a/config/ci/phpstan/php-8.5.symfony-7.1.neon b/config/ci/phpstan/php-8.5.symfony-7.1.neon
new file mode 100644
index 0000000..755cc95
--- /dev/null
+++ b/config/ci/phpstan/php-8.5.symfony-7.1.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80500
+    tmpDir: ../../../var/ci/phpstan/php-8-5/symfony-7-1
diff --git a/config/ci/phpstan/php-8.5.symfony-7.2.neon b/config/ci/phpstan/php-8.5.symfony-7.2.neon
new file mode 100644
index 0000000..ec45f52
--- /dev/null
+++ b/config/ci/phpstan/php-8.5.symfony-7.2.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80500
+    tmpDir: ../../../var/ci/phpstan/php-8-5/symfony-7-2
diff --git a/config/ci/phpstan/php-8.5.symfony-7.3.neon b/config/ci/phpstan/php-8.5.symfony-7.3.neon
new file mode 100644
index 0000000..36afcbe
--- /dev/null
+++ b/config/ci/phpstan/php-8.5.symfony-7.3.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80500
+    tmpDir: ../../../var/ci/phpstan/php-8-5/symfony-7-3
diff --git a/config/ci/phpstan/php-8.5.symfony-7.4.neon b/config/ci/phpstan/php-8.5.symfony-7.4.neon
new file mode 100644
index 0000000..31f2fed
--- /dev/null
+++ b/config/ci/phpstan/php-8.5.symfony-7.4.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80500
+    tmpDir: ../../../var/ci/phpstan/php-8-5/symfony-7-4
diff --git a/config/ci/phpstan/php-8.5.symfony-8.0.neon b/config/ci/phpstan/php-8.5.symfony-8.0.neon
new file mode 100644
index 0000000..6f0a191
--- /dev/null
+++ b/config/ci/phpstan/php-8.5.symfony-8.0.neon
@@ -0,0 +1,5 @@
+includes:
+    - common.neon
+parameters:
+    phpVersion: 80500
+    tmpDir: ../../../var/ci/phpstan/php-8-5/symfony-8-0
diff --git a/docker/ci/Dockerfile b/docker/ci/Dockerfile
index 6bd66d6..331f618 100644
--- a/docker/ci/Dockerfile
+++ b/docker/ci/Dockerfile
@@ -11,6 +11,8 @@ ENV COMPOSER_HOME_SYMFONY_7_0=/composer/symfony-7-0
 ENV COMPOSER_HOME_SYMFONY_7_1=/composer/symfony-7-1
 ENV COMPOSER_HOME_SYMFONY_7_2=/composer/symfony-7-2
 ENV COMPOSER_HOME_SYMFONY_7_3=/composer/symfony-7-3
+ENV COMPOSER_HOME_SYMFONY_7_4=/composer/symfony-7-4
+ENV COMPOSER_HOME_SYMFONY_8_0=/composer/symfony-8-0
 
 ENV PHPSTAN_BIN_PATH=/usr/local/bin/phpstan
 
@@ -38,6 +40,10 @@ RUN \
         php8.4-cli \
         php8.4-dom \
         php8.4-mbstring \
+        # PHP 8.5
+        php8.5-cli \
+        php8.5-dom \
+        php8.5-mbstring \
         # For Composer
         curl \
         zip \
@@ -61,6 +67,8 @@ RUN \
     && COMPOSER_HOME=${COMPOSER_HOME_SYMFONY_7_1} composer global require symfony/process:~7.1.5 symfony/console:7.1.* \
     && COMPOSER_HOME=${COMPOSER_HOME_SYMFONY_7_2} composer global require symfony/process:7.2.* symfony/console:7.2.* \
     && COMPOSER_HOME=${COMPOSER_HOME_SYMFONY_7_3} composer global require symfony/process:7.3.* symfony/console:7.3.* \
+    && COMPOSER_HOME=${COMPOSER_HOME_SYMFONY_7_4} composer global require symfony/process:7.4.* symfony/console:7.4.* \
+    && COMPOSER_HOME=${COMPOSER_HOME_SYMFONY_8_0} php8.4 /usr/local/bin/composer global require symfony/process:8.0.* symfony/console:8.0.* \
 
     # Purge
     && apt-get purge -y software-properties-common \
@@ -91,4 +99,14 @@ RUN \
         ${COMPOSER_HOME_SYMFONY_7_3}/cache \
         ${COMPOSER_HOME_SYMFONY_7_3}/composer.json \
         ${COMPOSER_HOME_SYMFONY_7_3}/composer.lock \
+    && rm -rf \
+        ${COMPOSER_HOME_SYMFONY_7_4}/.htaccess \
+        ${COMPOSER_HOME_SYMFONY_7_4}/cache \
+        ${COMPOSER_HOME_SYMFONY_7_4}/composer.json \
+        ${COMPOSER_HOME_SYMFONY_7_4}/composer.lock \
+    && rm -rf \
+        ${COMPOSER_HOME_SYMFONY_8_0}/.htaccess \
+        ${COMPOSER_HOME_SYMFONY_8_0}/cache \
+        ${COMPOSER_HOME_SYMFONY_8_0}/composer.json \
+        ${COMPOSER_HOME_SYMFONY_8_0}/composer.lock \
     && rm -rf /tmp/*
diff --git a/src/Process/Process.php b/src/Process/Process.php
index b5eff5c..80ad2f6 100644
--- a/src/Process/Process.php
+++ b/src/Process/Process.php
@@ -251,7 +251,6 @@ protected function updateStatus(bool $blocking): void
     protected function getParentPrivatePropertyValue(string $property): mixed
     {
         $reflection = new \ReflectionProperty(SymfonyProcess::class, $property);
-        $reflection->setAccessible(true);
 
         return $reflection->getValue($this);
     }
diff --git a/src/Process/ProcessInterface.php b/src/Process/ProcessInterface.php
index 3509c6e..29cf869 100644
--- a/src/Process/ProcessInterface.php
+++ b/src/Process/ProcessInterface.php
@@ -64,7 +64,10 @@ public function setSpreadErrorToApplicationExitCode(bool $spreadErrorToApplicati
 
     public function isSpreadErrorToApplicationExitCode(): bool;
 
-    /** @param array<mixed> $env */
+    /**
+     * @param (callable('err'|'out', string): void)|null $callback
+     * @param array<mixed> $env
+     */
     public function start(?callable $callback = null, array $env = []): void;
 
     public function stop(float $timeout = 10, ?int $signal = null): ?int;
diff --git a/tests/Console/Application/Theme/DefaultTheme/ConstructTest.php b/tests/Console/Application/Theme/DefaultTheme/ConstructTest.php
index aaca3a4..5eaa82b 100644
--- a/tests/Console/Application/Theme/DefaultTheme/ConstructTest.php
+++ b/tests/Console/Application/Theme/DefaultTheme/ConstructTest.php
@@ -37,7 +37,6 @@ public function testDefaultValues(): void
     private function getProtectedPropertyValue(DefaultTheme $theme, string $property)
     {
         $reflection = new \ReflectionProperty($theme, $property);
-        $reflection->setAccessible(true);
 
         return $reflection->getValue($theme);
     }
diff --git a/tests/Process/Process/GetParentPrivatePropertyValueTest.php b/tests/Process/Process/GetParentPrivatePropertyValueTest.php
index 336e193..062b9af 100644
--- a/tests/Process/Process/GetParentPrivatePropertyValueTest.php
+++ b/tests/Process/Process/GetParentPrivatePropertyValueTest.php
@@ -24,7 +24,6 @@ public function testStatus(): void
     {
         $process = $this->createLsProcess();
         $reflection = $this->createReflection($process);
-        $reflection->setAccessible(true);
 
         static::assertSame('ready', $reflection->getClosure($process)->call($process, 'status'));
     }
@@ -34,7 +33,6 @@ public function testStarttime(): void
         $process = $this->createLsProcess();
         $process->run();
         $reflection = $this->createReflection($process);
-        $reflection->setAccessible(true);
 
         static::assertLessThanOrEqual(
             microtime(true),
diff --git a/tests/Process/Process/UpdateStatusTest.php b/tests/Process/Process/UpdateStatusTest.php
index 5bfc89d..4d53c86 100644
--- a/tests/Process/Process/UpdateStatusTest.php
+++ b/tests/Process/Process/UpdateStatusTest.php
@@ -27,7 +27,6 @@ public function testProcessNotStarted(): void
     {
         $process = $this->createLsProcess();
         $reflection = $this->createReflection($process);
-        $reflection->setAccessible(true);
 
         static::assertNull($reflection->getClosure($process)->call($process, false));
         $this->expectException(ParallelProcessException::class);
@@ -40,7 +39,6 @@ public function testProcessTerminated(): void
     {
         $process = $this->createLsProcess();
         $reflection = $this->createReflection($process);
-        $reflection->setAccessible(true);
         $process->mustRun();
 
         static::assertNull($reflection->getClosure($process)->call($process, false));