diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 6cdbd0b..54cef90 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -9,7 +9,7 @@ jobs:
         runs-on: ubuntu-20.04
         steps:
             - name: Checkout
-              uses: actions/checkout@v2
+              uses: actions/checkout@v3
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
             - name: Validate composer.json
@@ -27,18 +27,23 @@ jobs:
                       composer_option: '--prefer-lowest'
                       env:
                           SYMFONY_DEPRECATIONS_HELPER: max[self]=0
+                    - description: 'PHP 8.0'
+                      php: '8.0'
+                    - description: 'PHP 8.1'
+                      php: '8.1'
                     - description: 'Dev deps'
-                      php: '7.4'
+                      php: '8.2'
                       dev: true
         name: PHP ${{ matrix.php }} tests (${{ matrix.description }})
         steps:
             - name: Checkout
-              uses: actions/checkout@v2
+              uses: actions/checkout@v3
             - run: |
                 phpenv config-rm xdebug.ini || true
+                composer global config --no-plugins allow-plugins.symfony/flex true
                 composer global require --no-progress --no-scripts --no-plugins symfony/flex 1.*
             - name: Cache
-              uses: actions/cache@v2
+              uses: actions/cache@v3
               with:
                   path: ~/.composer/cache/files
                   key: composer-${{ matrix.php }}-${{ matrix.symfony }}-${{ matrix.composer_option }}
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 4f8c9ee..3d0fd04 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -10,7 +10,7 @@
          failOnWarning="true"
 >
     <php>
-        <server name="SYMFONY_PHPUNIT_VERSION" value="7.5" />
+        <server name="SYMFONY_PHPUNIT_VERSION" value="8.5" />
     </php>
 
     <testsuites>
@@ -28,4 +28,4 @@
             </exclude>
         </whitelist>
     </filter>
-</phpunit>
\ No newline at end of file
+</phpunit>
diff --git a/tests/DependencyInjection/ConfigurationTest.php b/tests/DependencyInjection/ConfigurationTest.php
index 72e0be1..209f281 100644
--- a/tests/DependencyInjection/ConfigurationTest.php
+++ b/tests/DependencyInjection/ConfigurationTest.php
@@ -11,7 +11,7 @@ class ConfigurationTest extends TestCase
     /**
      * @dataProvider dataForProcessedConfiguration
      */
-    public function testProcessedConfiguration($configs, $expectedConfig)
+    public function testProcessedConfiguration($configs, $expectedConfig): void
     {
         $processor = new Processor();
         $configuration = new Configuration();
@@ -20,7 +20,7 @@ public function testProcessedConfiguration($configs, $expectedConfig)
         $this->assertEquals($expectedConfig, $config);
     }
 
-    public function dataForProcessedConfiguration()
+    public function dataForProcessedConfiguration(): array
     {
         return [
             [
diff --git a/tests/FunctionalTest.php b/tests/FunctionalTest.php
index 6430792..cfabbbd 100644
--- a/tests/FunctionalTest.php
+++ b/tests/FunctionalTest.php
@@ -13,7 +13,7 @@ class FunctionalTest extends TestCase
     /** @var Filesystem */
     private $filesystem;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->kernel = new TestKernel(uniqid(), false);
 
@@ -21,12 +21,12 @@ public function setUp()
         $this->filesystem->mkdir($this->kernel->getCacheDir());
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         $this->filesystem->remove($this->kernel->getCacheDir());
     }
 
-    public function testServiceIsAvailableOutOfTheBox()
+    public function testServiceIsAvailableOutOfTheBox(): void
     {
         $this->kernel->setConfigurationFilename(__DIR__ . '/fixtures/config/out_of_the_box.yml');
         $this->kernel->boot();
@@ -48,7 +48,7 @@ public function testServiceIsAvailableOutOfTheBox()
         $this->assertEquals('wkhtmltoimage', $image->getBinary());
     }
 
-    public function testChangeBinaries()
+    public function testChangeBinaries(): void
     {
         $this->kernel->setConfigurationFilename(__DIR__ . '/fixtures/config/change_binaries.yml');
         $this->kernel->boot();
@@ -68,7 +68,7 @@ public function testChangeBinaries()
         $this->assertEquals('/custom/binary/for/wkhtmltoimage', $image->getBinary());
     }
 
-    public function testChangeTemporaryFolder()
+    public function testChangeTemporaryFolder(): void
     {
         $this->kernel->setConfigurationFilename(__DIR__ . '/fixtures/config/change_temporary_folder.yml');
         $this->kernel->boot();
@@ -82,7 +82,7 @@ public function testChangeTemporaryFolder()
         $this->assertEquals('/path/to/the/tmp', $image->getTemporaryFolder());
     }
 
-    public function testDisablePdf()
+    public function testDisablePdf(): void
     {
         $this->kernel->setConfigurationFilename(__DIR__ . '/fixtures/config/disable_pdf.yml');
         $this->kernel->boot();
@@ -93,7 +93,7 @@ public function testDisablePdf()
         $this->assertTrue($container->has('knp_snappy.image'), 'The image service is available.');
     }
 
-    public function testDisableImage()
+    public function testDisableImage(): void
     {
         $this->kernel->setConfigurationFilename(__DIR__ . '/fixtures/config/disable_image.yml');
         $this->kernel->boot();
diff --git a/tests/Snappy/Generator/LoggableGeneratorTest.php b/tests/Snappy/Generator/LoggableGeneratorTest.php
index ebda2b2..98cd079 100644
--- a/tests/Snappy/Generator/LoggableGeneratorTest.php
+++ b/tests/Snappy/Generator/LoggableGeneratorTest.php
@@ -10,7 +10,7 @@
  */
 class LoggableGeneratorTest extends TestCase
 {
-    public function testGenerate()
+    public function testGenerate(): void
     {
         $internal = $this->createMock('Knp\Snappy\GeneratorInterface');
         $internal
@@ -33,7 +33,7 @@ public function testGenerate()
         $generator->generate('the_input_file', 'the_output_file', ['foo' => 'bar'], true);
     }
 
-    public function testGenerateFromHtml()
+    public function testGenerateFromHtml(): void
     {
         $internal = $this->createMock('Knp\Snappy\GeneratorInterface');
         $internal
@@ -56,7 +56,7 @@ public function testGenerateFromHtml()
         $generator->generateFromHtml('<html>foo</html>', 'the_output_file', ['foo' => 'bar'], true);
     }
 
-    public function testGenerateFromHtmlWithHtmlArray()
+    public function testGenerateFromHtmlWithHtmlArray(): void
     {
         $internal = $this->createMock('Knp\Snappy\GeneratorInterface');
         $internal
@@ -79,7 +79,7 @@ public function testGenerateFromHtmlWithHtmlArray()
         $generator->generateFromHtml(['<html>foo</html>', '<html>bar</html>'], 'the_output_file', ['foo' => 'bar'], true);
     }
 
-    public function testOutput()
+    public function testOutput(): void
     {
         $internal = $this->createMock('Knp\Snappy\GeneratorInterface');
         $internal
@@ -100,7 +100,7 @@ public function testOutput()
         $generator->getOutput('the_input_file', ['foo' => 'bar'], true);
     }
 
-    public function testOutputFromHtml()
+    public function testOutputFromHtml(): void
     {
         $internal = $this->createMock('Knp\Snappy\GeneratorInterface');
         $internal
@@ -121,7 +121,7 @@ public function testOutputFromHtml()
         $generator->getOutputFromHtml('<html>foo</html>', ['foo' => 'bar'], true);
     }
 
-    public function testOutputFromHtmlWithHtmlArray()
+    public function testOutputFromHtmlWithHtmlArray(): void
     {
         $internal = $this->createMock('Knp\Snappy\GeneratorInterface');
         $internal
@@ -142,7 +142,7 @@ public function testOutputFromHtmlWithHtmlArray()
         $generator->getOutputFromHtml(['<html>foo</html>'], ['foo' => 'bar'], true);
     }
 
-    public function testSetOption()
+    public function testSetOption(): void
     {
         $internal = $this->createMock('Knp\Snappy\Image');
         $internal
diff --git a/tests/Snappy/Response/JpegResponseTest.php b/tests/Snappy/Response/JpegResponseTest.php
index 8f59463..9a0cb82 100644
--- a/tests/Snappy/Response/JpegResponseTest.php
+++ b/tests/Snappy/Response/JpegResponseTest.php
@@ -7,7 +7,7 @@
 
 class JpegResponseTest extends TestCase
 {
-    public function testDefaultParameters()
+    public function testDefaultParameters(): void
     {
         $response = new JpegResponse('some_binary_output');
 
@@ -17,14 +17,14 @@ public function testDefaultParameters()
         $this->assertSame('inline; filename=output.jpg', str_replace('"', '', $response->headers->get('Content-Disposition')));
     }
 
-    public function testSetDifferentMimeType()
+    public function testSetDifferentMimeType(): void
     {
         $response = new JpegResponse('some_binary_output', 'test.jpg', 'application/octet-stream');
 
         $this->assertSame('application/octet-stream', $response->headers->get('Content-Type'));
     }
 
-    public function testSetDifferentFileName()
+    public function testSetDifferentFileName(): void
     {
         $fileName = 'test.jpg';
         $response = new JpegResponse('some_binary_output', $fileName);
diff --git a/tests/Snappy/Response/PdfResponseTest.php b/tests/Snappy/Response/PdfResponseTest.php
index 61fceca..1fc93b5 100644
--- a/tests/Snappy/Response/PdfResponseTest.php
+++ b/tests/Snappy/Response/PdfResponseTest.php
@@ -7,7 +7,7 @@
 
 class PdfResponseTest extends TestCase
 {
-    public function testDefaultParameters()
+    public function testDefaultParameters(): void
     {
         $response = new PdfResponse('some_binary_output');
 
@@ -17,14 +17,14 @@ public function testDefaultParameters()
         $this->assertSame('attachment; filename=output.pdf', str_replace('"', '', $response->headers->get('Content-Disposition')));
     }
 
-    public function testSetDifferentMimeType()
+    public function testSetDifferentMimeType(): void
     {
         $response = new PdfResponse('some_binary_output', 'test.pdf', 'application/octet-stream');
 
         $this->assertSame('application/octet-stream', $response->headers->get('Content-Type'));
     }
 
-    public function testSetDifferentFileName()
+    public function testSetDifferentFileName(): void
     {
         $fileName = 'test.pdf';
         $response = new PdfResponse('some_binary_output', $fileName);
diff --git a/tests/Snappy/Response/SnappyResponseTest.php b/tests/Snappy/Response/SnappyResponseTest.php
index a1679fe..3bdb890 100644
--- a/tests/Snappy/Response/SnappyResponseTest.php
+++ b/tests/Snappy/Response/SnappyResponseTest.php
@@ -7,7 +7,7 @@
 
 class SnappyResponseTest extends TestCase
 {
-    public function testExceptionMessage()
+    public function testExceptionMessage(): void
     {
         try {
             new SnappyResponse('', 'test.jpg', 'image/jpg', 'foo');
diff --git a/tests/TestKernel.php b/tests/TestKernel.php
index 7b46b74..6271814 100644
--- a/tests/TestKernel.php
+++ b/tests/TestKernel.php
@@ -14,7 +14,7 @@ class TestKernel extends Kernel
      *
      * @param string $filename
      */
-    public function setConfigurationFilename($filename)
+    public function setConfigurationFilename($filename): void
     {
         $this->configurationFilename = $filename;
     }
@@ -33,7 +33,7 @@ public function registerBundles(): iterable
     /**
      * {@inheritdoc}
      */
-    public function registerContainerConfiguration(LoaderInterface $loader)
+    public function registerContainerConfiguration(LoaderInterface $loader): void
     {
         $loader->load($this->configurationFilename);
     }
diff --git a/tests/fixtures/config/base.yml b/tests/fixtures/config/base.yml
index a746bf4..2c18b8b 100644
--- a/tests/fixtures/config/base.yml
+++ b/tests/fixtures/config/base.yml
@@ -2,3 +2,4 @@ framework:
     secret: ThisIsNotReallyASecretSoPleaseChangeIt
     router: { resource: "%kernel.project_dir%/config/routing.yml", utf8: true }
     validation: { enabled: true, enable_annotations: false }
+    http_method_override: false