diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 0434d1c8..0352c3bf 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -4,10 +4,6 @@ on:
   - push
   - pull_request
 
-env:
-  COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
-  SYMFONY_PHPUNIT_REMOVE_RETURN_TYPEHINT: "1"
-
 permissions:
   contents: read
 
@@ -15,7 +11,8 @@ jobs:
   tests:
     name: "CI"
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.experimental }}
 
     strategy:
       matrix:
@@ -25,41 +22,37 @@ jobs:
           - "7.4"
           - "8.0"
           - "8.1"
-        dependencies: [locked]
+          - "8.2"
+          - "8.3"
+          - "8.4"
+        dependencies: [highest]
+        experimental: [false]
+        os: [ubuntu-latest]
         include:
           - php-version: "7.2"
             dependencies: lowest
-          - php-version: "8.1"
+            os: ubuntu-latest
+            experimental: false
+          - php-version: "8.3"
             dependencies: lowest
+            os: ubuntu-latest
+            experimental: false
+          - php-version: "8.3"
+            dependencies: highest
+            os: windows-latest
+            experimental: false
 
     steps:
-      - name: "Checkout"
-        uses: "actions/checkout@v4"
+      - uses: actions/checkout@v4
 
-      - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+      - uses: shivammathur/setup-php@v2
         with:
-          coverage: "none"
           php-version: "${{ matrix.php-version }}"
-          tools: composer:snapshot
-
-      - name: Get composer cache directory
-        id: composercache
-        run: "echo \"dir=$(composer config cache-files-dir)\" >> $GITHUB_OUTPUT"
+          coverage: none
 
-      - name: Cache dependencies
-        uses: actions/cache@v2
+      - uses: ramsey/composer-install@v3
         with:
-          path: ${{ steps.composercache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: ${{ runner.os }}-composer-
-
-      - name: "Handle lowest dependencies update"
-        if: "contains(matrix.dependencies, 'lowest')"
-        run: "echo \"COMPOSER_FLAGS=$COMPOSER_FLAGS --prefer-lowest\" >> $GITHUB_ENV"
-
-      - name: "Install latest dependencies"
-        run: "composer update ${{ env.COMPOSER_FLAGS }}"
+          dependency-versions: ${{ matrix.dependencies }}
 
-      - name: "Run tests"
-        run: "vendor/bin/simple-phpunit --verbose"
+      - name: Run tests
+        run: composer test
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d3204ae4..f23abf17 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -17,17 +17,27 @@ jobs:
       matrix:
         php-version:
           - "7.2"
-          - "latest"
+          - "nightly"
 
     steps:
-      - name: "Checkout"
-        uses: "actions/checkout@v4"
+      - uses: actions/checkout@v4
 
-      - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+      - uses: shivammathur/setup-php@v2
         with:
-          coverage: "none"
           php-version: "${{ matrix.php-version }}"
+          coverage: none
 
       - name: "Lint PHP files"
-        run: "find src/ -type f -name '*.php' -print0 | xargs -0 -L1 -P4 -- php -l -f"
+        run: |
+          hasErrors=0
+          for f in $(find src/ tests/ -type f -name '*.php' ! -path '*/vendor/*' ! -path '*/Fixtures/*')
+          do
+            { error="$(php -derror_reporting=-1 -ddisplay_errors=1 -l -f $f 2>&1 1>&3 3>&-)"; } 3>&1;
+            if [ "$error" != "" ]; then
+              while IFS= read -r line; do echo "::error file=$f::$line"; done <<< "$error"
+              hasErrors=1
+            fi
+          done
+          if [ $hasErrors -eq 1 ]; then
+            exit 1
+          fi
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index ce2300b7..ce7db11f 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -4,10 +4,6 @@ on:
   - push
   - pull_request
 
-env:
-  COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
-  SYMFONY_PHPUNIT_VERSION: ""
-
 permissions:
   contents: read
 
@@ -20,33 +16,20 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "8.0"
+          - "7.2"
+          - "8.3"
 
     steps:
-      - name: "Checkout"
-        uses: "actions/checkout@v4"
+      - uses: actions/checkout@v4
 
-      - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+      - uses: shivammathur/setup-php@v2
         with:
-          coverage: "none"
           php-version: "${{ matrix.php-version }}"
+          coverage: none
 
-      - name: Get composer cache directory
-        id: composercache
-        run: "echo \"dir=$(composer config cache-files-dir)\" >> $GITHUB_OUTPUT"
-
-      - name: Cache dependencies
-        uses: actions/cache@v2
+      - uses: ramsey/composer-install@v3
         with:
-          path: ${{ steps.composercache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: ${{ runner.os }}-composer-
-
-      - name: "Install latest dependencies"
-        run: "composer update ${{ env.COMPOSER_FLAGS }}"
+          dependency-versions: highest
 
       - name: Run PHPStan
-        run: |
-          composer require --dev phpunit/phpunit:^8.5.18 --with-all-dependencies ${{ env.COMPOSER_FLAGS }}
-          vendor/bin/phpstan analyse
+        run: composer phpstan
diff --git a/composer.json b/composer.json
index 91034848..a0f178ab 100644
--- a/composer.json
+++ b/composer.json
@@ -105,13 +105,13 @@
     "require-dev": {
         "composer/composer": "^1.10.27 || ^2.7",
         "composer/semver": "^1.7.2 || ^3.4.0",
-        "symfony/phpunit-bridge": "^7.1.1",
+        "phpunit/phpunit": "^8 || ^9",
         "phpstan/phpstan": "^1.11",
         "symfony/process": "^5 || ^6 || ^7",
         "phpstan/phpstan-phpunit": "^1"
     },
     "scripts": {
-        "test": "@php vendor/bin/simple-phpunit",
-        "phpstan": "@php vendor/bin/phpstan analyse"
+        "test": "@php phpunit",
+        "phpstan": "@php phpstan analyse"
     }
 }
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 51554790..2ed1c4e1 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -3,7 +3,7 @@ parameters:
     paths:
         - src
         - tests
-    excludes_analyse:
+    excludePaths:
         - tests/Composer/Installers/Test/PolyfillTestCase.php
     ignoreErrors:
         - '~Test::[a-zA-Z0-9]+Provider\(\) return type~'