diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 695780a..0c9be5d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '8.1', '8.2', '8.3' ]
+        php: [ '8.2', '8.3', '8.4', '8.5' ]
         strategy: [ 'highest' ]
         sf_version: ['']
 
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index c663e3d..ae4b9e9 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -9,7 +9,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: PHP-CS-Fixer
-        uses: docker://jakzal/phpqa:php8.1-alpine
+        uses: docker://jakzal/phpqa:php8.2-alpine
         with:
             args: php-cs-fixer fix --diff --dry-run -vvv
 
@@ -19,6 +19,6 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: PHPStan
-        uses: docker://jakzal/phpqa:php8.1-alpine
+        uses: docker://jakzal/phpqa:php8.2-alpine
         with:
           args: phpstan analyze --no-progress
diff --git a/.gitignore b/.gitignore
index bc4d0f4..101afff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /phpspec.yml
 /phpunit.xml
 /vendor/
+/.php-cs-fixer.cache
diff --git a/Makefile b/Makefile
index c001421..2cb6500 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,13 @@
 .PHONY: cs-fix phpstan
 
 DIR := ${CURDIR}
-QA_IMAGE := jakzal/phpqa:php7.3-alpine
+QA_IMAGE := jakzal/phpqa:php8.2-alpine
 
 cs-lint:
-	@docker run --rm -v $(DIR):/project -w /project $(QA_IMAGE) php-cs-fixer fix --diff-format udiff --dry-run -vvv
+	@docker run --rm -v $(DIR):/project -w /project $(QA_IMAGE) php-cs-fixer fix --dry-run -vvv
 
 cs-fix:
-	@docker run --rm -v $(DIR):/project -w /project $(QA_IMAGE) php-cs-fixer fix --diff-format udiff -vvv
+	@docker run --rm -v $(DIR):/project -w /project $(QA_IMAGE) php-cs-fixer fix -vvv
 
 phpstan:
 	@docker run --rm -v $(DIR):/project -w /project $(QA_IMAGE) phpstan analyse
diff --git a/composer.json b/composer.json
index fa423e7..2623b8f 100644
--- a/composer.json
+++ b/composer.json
@@ -9,18 +9,18 @@
         }
     ],
     "require": {
-        "php": "^8.1",
+        "php": "^8.2",
         "nikic/php-parser": "^5.0",
         "symfony/deprecation-contracts": "^2.5 || ^3.0",
-        "symfony/finder": "^5.4 || ^6.4 || ^7.0",
+        "symfony/finder": "^5.4 || ^6.4 || ^7.0 || ^8.0",
         "twig/twig": "^2.0 || ^3.0",
         "phpstan/phpdoc-parser": "^2.3"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^5.4 || ^6.4 || ^7.0",
-        "symfony/translation": "^5.4 || ^6.4 || ^7.0",
-        "symfony/validator": "^5.4 || ^6.4 || ^7.0",
-        "symfony/twig-bridge": "^5.4 || ^6.4 || ^7.0",
+        "symfony/phpunit-bridge": "^5.4 || ^6.4 || ^7.0 || ^8.0",
+        "symfony/translation": "^5.4 || ^6.4 || ^7.0 || ^8.0",
+        "symfony/validator": "^5.4 || ^6.4 || ^7.0 || ^8.0",
+        "symfony/twig-bridge": "^5.4 || ^6.4 || ^7.0 || ^8.0",
         "knplabs/knp-menu": "^3.1"
     },
     "autoload": {
diff --git a/tests/Functional/BladeTest.php b/tests/Functional/BladeTest.php
index 22c692a..b4faec6 100644
--- a/tests/Functional/BladeTest.php
+++ b/tests/Functional/BladeTest.php
@@ -38,7 +38,7 @@ private function getSourceLocations($relativePath)
         return $collection;
     }
 
-    public function testExtractLang()
+    public function testExtractLang(): void
     {
         $collection = $this->getSourceLocations('Blade/lang.blade.php');
 
@@ -47,7 +47,7 @@ public function testExtractLang()
         $this->assertEquals('foo.bar', $source->getMessage());
     }
 
-    public function testExtractTrans()
+    public function testExtractTrans(): void
     {
         $collection = $this->getSourceLocations('Blade/trans.blade.php');
 
@@ -56,7 +56,7 @@ public function testExtractTrans()
         $this->assertEquals('foo.bar', $source->getMessage());
     }
 
-    public function testExtractTransChoice()
+    public function testExtractTransChoice(): void
     {
         $collection = $this->getSourceLocations('Blade/trans_choice.blade.php');
 
diff --git a/tests/Functional/Visitor/Php/DescriptionTest.php b/tests/Functional/Visitor/Php/DescriptionTest.php
index 44073b2..cda7299 100644
--- a/tests/Functional/Visitor/Php/DescriptionTest.php
+++ b/tests/Functional/Visitor/Php/DescriptionTest.php
@@ -16,7 +16,7 @@
 
 final class DescriptionTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypeLabelExplicit(), DescriptionType::class);
 
diff --git a/tests/Functional/Visitor/Php/Knp/MenuTest.php b/tests/Functional/Visitor/Php/Knp/MenuTest.php
index ca2cc57..a6a82af 100644
--- a/tests/Functional/Visitor/Php/Knp/MenuTest.php
+++ b/tests/Functional/Visitor/Php/Knp/MenuTest.php
@@ -18,7 +18,7 @@
 
 final class MenuTest extends BasePHPVisitorTest
 {
-    public function testExtractOne()
+    public function testExtractOne(): void
     {
         $collection = $this->getSourceLocations(new ItemLabel(),
             Resources\Php\Knp\Menu::class);
@@ -30,7 +30,7 @@ public function testExtractOne()
         $this->assertEquals('foo.second.label', $collection->get(3)->getMessage());
     }
 
-    public function testExtractTwo()
+    public function testExtractTwo(): void
     {
         $collection = $this->getSourceLocations(new LinkTitle(),
             Resources\Php\Knp\Menu::class);
diff --git a/tests/Functional/Visitor/Php/SourceLocationContainerExtractorTest.php b/tests/Functional/Visitor/Php/SourceLocationContainerExtractorTest.php
index cd37842..62be0a6 100644
--- a/tests/Functional/Visitor/Php/SourceLocationContainerExtractorTest.php
+++ b/tests/Functional/Visitor/Php/SourceLocationContainerExtractorTest.php
@@ -19,7 +19,7 @@
  */
 final class SourceLocationContainerExtractorTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new SourceLocationContainerVisitor(), Resources\Php\SourceLocationContainer::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/ConstraintTest.php b/tests/Functional/Visitor/Php/Symfony/ConstraintTest.php
index d4623dd..eb43cdc 100644
--- a/tests/Functional/Visitor/Php/Symfony/ConstraintTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/ConstraintTest.php
@@ -20,7 +20,7 @@
  */
 final class ConstraintTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new Constraint(), Resources\Php\Symfony\Constraint::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransChoiceTest.php b/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransChoiceTest.php
index 08adc82..ec8671d 100644
--- a/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransChoiceTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransChoiceTest.php
@@ -20,7 +20,7 @@
  */
 final class ContainerAwareTransChoiceTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new ContainerAwareTransChoice(), Resources\Php\Symfony\ContainerAwareTransChoice::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransTest.php b/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransTest.php
index 644e44e..9a6e837 100644
--- a/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/ContainerAwareTransTest.php
@@ -20,7 +20,7 @@
  */
 final class ContainerAwareTransTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new ContainerAwareTrans(), Resources\Php\Symfony\ContainerAwareTrans::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FlashMessageTest.php b/tests/Functional/Visitor/Php/Symfony/FlashMessageTest.php
index fc1e37a..5568e4a 100644
--- a/tests/Functional/Visitor/Php/Symfony/FlashMessageTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FlashMessageTest.php
@@ -20,7 +20,7 @@
  */
 final class FlashMessageTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FlashMessage(), Resources\Php\Symfony\FlashMessage::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FormEmptyValueTest.php b/tests/Functional/Visitor/Php/Symfony/FormEmptyValueTest.php
index f5874fa..76825ad 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormEmptyValueTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormEmptyValueTest.php
@@ -20,7 +20,7 @@
  */
 class FormEmptyValueTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypeEmptyValue(), Resources\Php\Symfony\EmptyValueType::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php
index cdaaeb5..75791bd 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeChoicesTest.php
@@ -19,7 +19,7 @@
  */
 class FormTypeChoicesTest extends BasePHPVisitorTest
 {
-    public function testSimpleSymfony3x()
+    public function testSimpleSymfony3x(): void
     {
         $collection = $this->getSourceLocations(new FormTypeChoices(), SimpleChoiceSymfony3xType::class);
 
@@ -28,7 +28,7 @@ public function testSimpleSymfony3x()
         $this->assertEquals(10, $collection->get(0)->getLine());
     }
 
-    public function testSimpleSymfony27()
+    public function testSimpleSymfony27(): void
     {
         $visitor = new FormTypeChoices();
         $visitor->setSymfonyMajorVersion(2);
@@ -42,7 +42,7 @@ public function testSimpleSymfony27()
         $this->assertEquals(12, $collection->get(0)->getLine());
     }
 
-    public function testChainedChoice()
+    public function testChainedChoice(): void
     {
         $visitor = new FormTypeChoices();
         $visitor->setSymfonyMajorVersion(3);
@@ -53,7 +53,7 @@ public function testChainedChoice()
         $this->assertEquals('label2', $collection->get(1)->getMessage());
     }
 
-    public function testExtractError()
+    public function testExtractError(): void
     {
         $collection = $this->getSourceLocations(new FormTypeChoices(), SimpleChoiceSymfony3xErrorType::class);
 
@@ -61,7 +61,7 @@ public function testExtractError()
         $this->assertCount(1, $errors);
     }
 
-    public function testPassedChoices()
+    public function testPassedChoices(): void
     {
         $collection = $this->getSourceLocations(new FormTypeChoices(), SimpleChoicePassArrayType::class);
 
@@ -70,7 +70,7 @@ public function testPassedChoices()
         $this->assertEquals(9, $collection->get(0)->getLine());
     }
 
-    public function testChoiceTranslationDomain()
+    public function testChoiceTranslationDomain(): void
     {
         $collection = $this->getSourceLocations(new FormTypeChoices(), FormDomainChoiceType::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeHelpTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeHelpTest.php
index bb18561..b62b940 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeHelpTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeHelpTest.php
@@ -18,7 +18,7 @@
 
 final class FormTypeHelpTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypeHelp(),
             Resources\Php\Symfony\HelpFormType::class);
@@ -28,7 +28,7 @@ public function testExtract()
         $this->assertEquals('form.help.text.but.no.label', $collection->get(1)->getMessage());
     }
 
-    public function testExtractError()
+    public function testExtractError(): void
     {
         $collection = $this->getSourceLocations(new FormTypeHelp(),
             Resources\Php\Symfony\HelpFormErrorType::class);
@@ -37,7 +37,7 @@ public function testExtractError()
         $this->assertCount(2, $errors);
     }
 
-    public function testChildVisitationNotBlocked()
+    public function testChildVisitationNotBlocked(): void
     {
         $collection = $this->getSourceLocations(
             [
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeInvalidMessageTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeInvalidMessageTest.php
index 6fa97d9..ac23681 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeInvalidMessageTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeInvalidMessageTest.php
@@ -20,7 +20,7 @@
  */
 class FormTypeInvalidMessageTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypeInvalidMessage(), Resources\Php\Symfony\FormInvalidMessage::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeLabelExplicitTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeLabelExplicitTest.php
index 7e8c19e..bc2331b 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeLabelExplicitTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeLabelExplicitTest.php
@@ -20,7 +20,7 @@
  */
 class FormTypeLabelExplicitTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypeLabelExplicit(), Resources\Php\Symfony\ExplicitLabelType::class);
 
@@ -35,13 +35,13 @@ public function testExtract()
         $this->assertCount(4, $collection->getErrors());
     }
 
-    public function testWillNotExtractTypeless()
+    public function testWillNotExtractTypeless(): void
     {
         $collection = $this->getSourceLocations(new FormTypeLabelExplicit(), Resources\Php\Symfony\ExplicitLabelTypeless::class);
         $this->assertCount(0, $collection);
     }
 
-    public function testWithLabelFalse()
+    public function testWithLabelFalse(): void
     {
         $collection = $this->getSourceLocations(new FormTypeLabelExplicit(), Resources\Php\Symfony\ExplicitLabelFalseType::class);
         $this->assertEmpty($collection);
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeLabelImplicitTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeLabelImplicitTest.php
index c1afda0..9cae5d3 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeLabelImplicitTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeLabelImplicitTest.php
@@ -19,7 +19,7 @@
  */
 class FormTypeLabelImplicitTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypeLabelImplicit(), ImplicitLabelType::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeLabelTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeLabelTest.php
index 66f2f52..991068b 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeLabelTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeLabelTest.php
@@ -43,7 +43,7 @@ public function __construct()
         parent::__construct();
     }
 
-    public function testTranslationDomain()
+    public function testTranslationDomain(): void
     {
         $collection = $this->getSourceLocations($this->allFormVisitors, Resources\Php\Symfony\FormDomainType::class);
 
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypePlaceholderTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypePlaceholderTest.php
index ed37c29..78c9a94 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypePlaceholderTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypePlaceholderTest.php
@@ -21,7 +21,7 @@
  */
 final class FormTypePlaceholderTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypePlaceholder(),
             Resources\Php\Symfony\PlaceholderFormType::class);
@@ -35,7 +35,7 @@ public function testExtract()
         $this->assertEquals('form.date_placeholder.day', $collection->get(5)->getMessage());
     }
 
-    public function testExtractError()
+    public function testExtractError(): void
     {
         $collection = $this->getSourceLocations(new FormTypePlaceholder(),
             Resources\Php\Symfony\PlaceholderFormErrorType::class);
@@ -44,7 +44,7 @@ public function testExtractError()
         $this->assertCount(3, $errors);
     }
 
-    public function testChildVisitationNotBlocked()
+    public function testChildVisitationNotBlocked(): void
     {
         $collection = $this->getSourceLocations(
             [
diff --git a/tests/Functional/Visitor/Php/Symfony/FormTypeTitleTest.php b/tests/Functional/Visitor/Php/Symfony/FormTypeTitleTest.php
index c69d416..961b315 100644
--- a/tests/Functional/Visitor/Php/Symfony/FormTypeTitleTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/FormTypeTitleTest.php
@@ -21,7 +21,7 @@
  */
 final class FormTypeTitleTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new FormTypeTitle(),
             Resources\Php\Symfony\TitleFormType::class);
@@ -30,7 +30,7 @@ public function testExtract()
         $this->assertEquals('form.title.text', $collection->get(0)->getMessage());
     }
 
-    public function testExtractError()
+    public function testExtractError(): void
     {
         $collection = $this->getSourceLocations(new FormTypeTitle(),
             Resources\Php\Symfony\TitleFormErrorType::class);
@@ -39,7 +39,7 @@ public function testExtractError()
         $this->assertCount(1, $errors);
     }
 
-    public function testChildVisitationNotBlocked()
+    public function testChildVisitationNotBlocked(): void
     {
         $collection = $this->getSourceLocations(
             [
diff --git a/tests/Functional/Visitor/Php/Symfony/ValidationAnnotationTest.php b/tests/Functional/Visitor/Php/Symfony/ValidationAnnotationTest.php
index 3a4e770..b295547 100644
--- a/tests/Functional/Visitor/Php/Symfony/ValidationAnnotationTest.php
+++ b/tests/Functional/Visitor/Php/Symfony/ValidationAnnotationTest.php
@@ -22,7 +22,7 @@
  */
 final class ValidationAnnotationTest extends BasePHPVisitorTest
 {
-    public function testExtractAnnotation()
+    public function testExtractAnnotation(): void
     {
         $factory = new LazyLoadingMetadataFactory(new AttributeLoader());
         $extractor = new ValidationAnnotation($factory);
diff --git a/tests/Functional/Visitor/Php/TranslateAnnotationVisitorTest.php b/tests/Functional/Visitor/Php/TranslateAnnotationVisitorTest.php
index 022ea4b..180bc31 100644
--- a/tests/Functional/Visitor/Php/TranslateAnnotationVisitorTest.php
+++ b/tests/Functional/Visitor/Php/TranslateAnnotationVisitorTest.php
@@ -16,7 +16,7 @@
 
 final class TranslateAnnotationVisitorTest extends BasePHPVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new TranslateAnnotationVisitor(),
             TestTranslateAnnotationFile::class);
diff --git a/tests/Functional/Visitor/Twig/TranslationBlockTest.php b/tests/Functional/Visitor/Twig/TranslationBlockTest.php
index 2db0734..c07a2ea 100644
--- a/tests/Functional/Visitor/Twig/TranslationBlockTest.php
+++ b/tests/Functional/Visitor/Twig/TranslationBlockTest.php
@@ -19,7 +19,7 @@
  */
 final class TranslationBlockTest extends BaseTwigVisitorTest
 {
-    public function testTrans()
+    public function testTrans(): void
     {
         $collection = $this->getSourceLocations(new TwigVisitor(), 'Twig/TranslationBlock/trans.html.twig');
 
@@ -37,7 +37,7 @@ public function testTrans()
         $this->assertEquals('messages', $source->getContext()['domain']);
     }
 
-    public function testTranschoice()
+    public function testTranschoice(): void
     {
         if (!class_exists(TransChoiceTokenParser::class)) {
             $this->markTestSkipped('Transchoice is not available anymore.');
diff --git a/tests/Functional/Visitor/Twig/TranslationFilterTest.php b/tests/Functional/Visitor/Twig/TranslationFilterTest.php
index dd7bf65..8dacd23 100644
--- a/tests/Functional/Visitor/Twig/TranslationFilterTest.php
+++ b/tests/Functional/Visitor/Twig/TranslationFilterTest.php
@@ -18,7 +18,7 @@
  */
 final class TranslationFilterTest extends BaseTwigVisitorTest
 {
-    public function testExtract()
+    public function testExtract(): void
     {
         $collection = $this->getSourceLocations(new TwigVisitor(), 'Twig/TranslationFilter/trans.html.twig');
 
@@ -27,7 +27,7 @@ public function testExtract()
         $this->assertEquals('foobar', $source->getMessage());
     }
 
-    public function testDescExtract()
+    public function testDescExtract(): void
     {
         $collection = $this->getSourceLocations(new TwigVisitor(), 'Twig/TranslationFilter/desc.html.twig');
 
@@ -37,7 +37,7 @@ public function testDescExtract()
         $this->assertEquals('baz', $source->getContext()['desc']);
     }
 
-    public function testDescExtractError()
+    public function testDescExtractError(): void
     {
         $collection = $this->getSourceLocations(new TwigVisitor(), 'Twig/TranslationFilter/desc-error.html.twig');
 
diff --git a/tests/Smoke/AllExtractorsTest.php b/tests/Smoke/AllExtractorsTest.php
index 0c7549e..a2b82bc 100644
--- a/tests/Smoke/AllExtractorsTest.php
+++ b/tests/Smoke/AllExtractorsTest.php
@@ -43,7 +43,7 @@
  */
 class AllExtractorsTest extends TestCase
 {
-    public function testNoException()
+    public function testNoException(): void
     {
         $extractor = new Extractor();
         $extractor->addFileExtractor($this->getPHPFileExtractor());
diff --git a/tests/Unit/Model/SourceLocationTest.php b/tests/Unit/Model/SourceLocationTest.php
index 9b5617d..f56837a 100644
--- a/tests/Unit/Model/SourceLocationTest.php
+++ b/tests/Unit/Model/SourceLocationTest.php
@@ -16,7 +16,7 @@
 
 class SourceLocationTest extends TestCase
 {
-    public function testCreateHere()
+    public function testCreateHere(): void
     {
         $location = SourceLocation::createHere('foobar', ['foo' => 'bar']);
 
@@ -27,7 +27,7 @@ public function testCreateHere()
         $this->assertEquals(['foo' => 'bar'], $location->getContext());
     }
 
-    public function testCreateHereViaCallback()
+    public function testCreateHereViaCallback(): void
     {
         $location = array_map('\Translation\Extractor\Model\SourceLocation::createHere', ['baz'])[0];