diff --git a/LICENSE b/LICENSE
index 0083704..0138f8f 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2004-2023 Fabien Potencier
+Copyright (c) 2004-present Fabien Potencier
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/Tests/CssSelectorConverterTest.php b/Tests/CssSelectorConverterTest.php
index 5fca693..36d39f3 100644
--- a/Tests/CssSelectorConverterTest.php
+++ b/Tests/CssSelectorConverterTest.php
@@ -60,7 +60,7 @@ public function testCssToXPathWithoutPrefix($css, $xpath)
         $this->assertEquals($xpath, $converter->toXPath($css, ''), '->parse() parses an input string and returns a node');
     }
 
-    public function getCssToXPathWithoutPrefixTestData()
+    public static function getCssToXPathWithoutPrefixTestData()
     {
         return [
             ['h1', 'h1'],
diff --git a/Tests/Node/AbstractNodeTest.php b/Tests/Node/AbstractNodeTestCase.php
similarity index 80%
rename from Tests/Node/AbstractNodeTest.php
rename to Tests/Node/AbstractNodeTestCase.php
index 5955513..521e6d8 100644
--- a/Tests/Node/AbstractNodeTest.php
+++ b/Tests/Node/AbstractNodeTestCase.php
@@ -14,7 +14,7 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Node\NodeInterface;
 
-abstract class AbstractNodeTest extends TestCase
+abstract class AbstractNodeTestCase extends TestCase
 {
     /** @dataProvider getToStringConversionTestData */
     public function testToStringConversion(NodeInterface $node, $representation)
@@ -28,7 +28,7 @@ public function testSpecificityValue(NodeInterface $node, $value)
         $this->assertEquals($value, $node->getSpecificity()->getValue());
     }
 
-    abstract public function getToStringConversionTestData();
+    abstract public static function getToStringConversionTestData();
 
-    abstract public function getSpecificityValueTestData();
+    abstract public static function getSpecificityValueTestData();
 }
diff --git a/Tests/Node/AttributeNodeTest.php b/Tests/Node/AttributeNodeTest.php
index 4d60074..62364c4 100644
--- a/Tests/Node/AttributeNodeTest.php
+++ b/Tests/Node/AttributeNodeTest.php
@@ -14,9 +14,9 @@
 use Symfony\Component\CssSelector\Node\AttributeNode;
 use Symfony\Component\CssSelector\Node\ElementNode;
 
-class AttributeNodeTest extends AbstractNodeTest
+class AttributeNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new AttributeNode(new ElementNode(), null, 'attribute', 'exists', null), 'Attribute[Element[*][attribute]]'],
@@ -25,7 +25,7 @@ public function getToStringConversionTestData()
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new AttributeNode(new ElementNode(), null, 'attribute', 'exists', null), 10],
diff --git a/Tests/Node/ClassNodeTest.php b/Tests/Node/ClassNodeTest.php
index aa80c92..3c0c67a 100644
--- a/Tests/Node/ClassNodeTest.php
+++ b/Tests/Node/ClassNodeTest.php
@@ -14,16 +14,16 @@
 use Symfony\Component\CssSelector\Node\ClassNode;
 use Symfony\Component\CssSelector\Node\ElementNode;
 
-class ClassNodeTest extends AbstractNodeTest
+class ClassNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new ClassNode(new ElementNode(), 'class'), 'Class[Element[*].class]'],
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new ClassNode(new ElementNode(), 'class'), 10],
diff --git a/Tests/Node/CombinedSelectorNodeTest.php b/Tests/Node/CombinedSelectorNodeTest.php
index 435eaa6..bf9ed06 100644
--- a/Tests/Node/CombinedSelectorNodeTest.php
+++ b/Tests/Node/CombinedSelectorNodeTest.php
@@ -14,9 +14,9 @@
 use Symfony\Component\CssSelector\Node\CombinedSelectorNode;
 use Symfony\Component\CssSelector\Node\ElementNode;
 
-class CombinedSelectorNodeTest extends AbstractNodeTest
+class CombinedSelectorNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new CombinedSelectorNode(new ElementNode(), '>', new ElementNode()), 'CombinedSelector[Element[*] > Element[*]]'],
@@ -24,7 +24,7 @@ public function getToStringConversionTestData()
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new CombinedSelectorNode(new ElementNode(), '>', new ElementNode()), 0],
diff --git a/Tests/Node/ElementNodeTest.php b/Tests/Node/ElementNodeTest.php
index e0797ff..e864eec 100644
--- a/Tests/Node/ElementNodeTest.php
+++ b/Tests/Node/ElementNodeTest.php
@@ -13,9 +13,9 @@
 
 use Symfony\Component\CssSelector\Node\ElementNode;
 
-class ElementNodeTest extends AbstractNodeTest
+class ElementNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new ElementNode(), 'Element[*]'],
@@ -24,7 +24,7 @@ public function getToStringConversionTestData()
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new ElementNode(), 0],
diff --git a/Tests/Node/FunctionNodeTest.php b/Tests/Node/FunctionNodeTest.php
index 0932393..b8d2e7a 100644
--- a/Tests/Node/FunctionNodeTest.php
+++ b/Tests/Node/FunctionNodeTest.php
@@ -15,9 +15,9 @@
 use Symfony\Component\CssSelector\Node\FunctionNode;
 use Symfony\Component\CssSelector\Parser\Token;
 
-class FunctionNodeTest extends AbstractNodeTest
+class FunctionNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new FunctionNode(new ElementNode(), 'function'), 'Function[Element[*]:function()]'],
@@ -31,7 +31,7 @@ public function getToStringConversionTestData()
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new FunctionNode(new ElementNode(), 'function'), 10],
diff --git a/Tests/Node/HashNodeTest.php b/Tests/Node/HashNodeTest.php
index ad6765b..a33cdd9 100644
--- a/Tests/Node/HashNodeTest.php
+++ b/Tests/Node/HashNodeTest.php
@@ -14,16 +14,16 @@
 use Symfony\Component\CssSelector\Node\ElementNode;
 use Symfony\Component\CssSelector\Node\HashNode;
 
-class HashNodeTest extends AbstractNodeTest
+class HashNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new HashNode(new ElementNode(), 'id'), 'Hash[Element[*]#id]'],
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new HashNode(new ElementNode(), 'id'), 100],
diff --git a/Tests/Node/NegationNodeTest.php b/Tests/Node/NegationNodeTest.php
index 90b684c..f90fa36 100644
--- a/Tests/Node/NegationNodeTest.php
+++ b/Tests/Node/NegationNodeTest.php
@@ -15,16 +15,16 @@
 use Symfony\Component\CssSelector\Node\ElementNode;
 use Symfony\Component\CssSelector\Node\NegationNode;
 
-class NegationNodeTest extends AbstractNodeTest
+class NegationNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new NegationNode(new ElementNode(), new ClassNode(new ElementNode(), 'class')), 'Negation[Element[*]:not(Class[Element[*].class])]'],
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new NegationNode(new ElementNode(), new ClassNode(new ElementNode(), 'class')), 10],
diff --git a/Tests/Node/PseudoNodeTest.php b/Tests/Node/PseudoNodeTest.php
index 4e78776..f4c7404 100644
--- a/Tests/Node/PseudoNodeTest.php
+++ b/Tests/Node/PseudoNodeTest.php
@@ -14,16 +14,16 @@
 use Symfony\Component\CssSelector\Node\ElementNode;
 use Symfony\Component\CssSelector\Node\PseudoNode;
 
-class PseudoNodeTest extends AbstractNodeTest
+class PseudoNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new PseudoNode(new ElementNode(), 'pseudo'), 'Pseudo[Element[*]:pseudo]'],
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new PseudoNode(new ElementNode(), 'pseudo'), 10],
diff --git a/Tests/Node/SelectorNodeTest.php b/Tests/Node/SelectorNodeTest.php
index 85e3bda..3bf6666 100644
--- a/Tests/Node/SelectorNodeTest.php
+++ b/Tests/Node/SelectorNodeTest.php
@@ -14,9 +14,9 @@
 use Symfony\Component\CssSelector\Node\ElementNode;
 use Symfony\Component\CssSelector\Node\SelectorNode;
 
-class SelectorNodeTest extends AbstractNodeTest
+class SelectorNodeTest extends AbstractNodeTestCase
 {
-    public function getToStringConversionTestData()
+    public static function getToStringConversionTestData()
     {
         return [
             [new SelectorNode(new ElementNode()), 'Selector[Element[*]]'],
@@ -24,7 +24,7 @@ public function getToStringConversionTestData()
         ];
     }
 
-    public function getSpecificityValueTestData()
+    public static function getSpecificityValueTestData()
     {
         return [
             [new SelectorNode(new ElementNode()), 0],
diff --git a/Tests/Node/SpecificityTest.php b/Tests/Node/SpecificityTest.php
index bf48d49..8802e0c 100644
--- a/Tests/Node/SpecificityTest.php
+++ b/Tests/Node/SpecificityTest.php
@@ -28,7 +28,7 @@ public function testPlusValue(Specificity $specificity, $value)
         $this->assertEquals($value + 123, $specificity->plus(new Specificity(1, 2, 3))->getValue());
     }
 
-    public function getValueTestData()
+    public static function getValueTestData()
     {
         return [
             [new Specificity(0, 0, 0), 0],
@@ -45,7 +45,7 @@ public function testCompareTo(Specificity $a, Specificity $b, $result)
         $this->assertEquals($result, $a->compareTo($b));
     }
 
-    public function getCompareTestData()
+    public static function getCompareTestData()
     {
         return [
             [new Specificity(0, 0, 0), new Specificity(0, 0, 0), 0],
diff --git a/Tests/Parser/Handler/AbstractHandlerTest.php b/Tests/Parser/Handler/AbstractHandlerTestCase.php
similarity index 91%
rename from Tests/Parser/Handler/AbstractHandlerTest.php
rename to Tests/Parser/Handler/AbstractHandlerTestCase.php
index 8afc7ae..30ce10e 100644
--- a/Tests/Parser/Handler/AbstractHandlerTest.php
+++ b/Tests/Parser/Handler/AbstractHandlerTestCase.php
@@ -19,7 +19,7 @@
 /**
  * @author Jean-François Simon <contact@jfsimon.fr>
  */
-abstract class AbstractHandlerTest extends TestCase
+abstract class AbstractHandlerTestCase extends TestCase
 {
     /** @dataProvider getHandleValueTestData */
     public function testHandleValue($value, Token $expectedToken, $remainingContent)
@@ -43,9 +43,9 @@ public function testDontHandleValue($value)
         $this->assertRemainingContent($reader, $value);
     }
 
-    abstract public function getHandleValueTestData();
+    abstract public static function getHandleValueTestData();
 
-    abstract public function getDontHandleValueTestData();
+    abstract public static function getDontHandleValueTestData();
 
     abstract protected function generateHandler();
 
diff --git a/Tests/Parser/Handler/CommentHandlerTest.php b/Tests/Parser/Handler/CommentHandlerTest.php
index de40047..c3be7f4 100644
--- a/Tests/Parser/Handler/CommentHandlerTest.php
+++ b/Tests/Parser/Handler/CommentHandlerTest.php
@@ -16,7 +16,7 @@
 use Symfony\Component\CssSelector\Parser\Token;
 use Symfony\Component\CssSelector\Parser\TokenStream;
 
-class CommentHandlerTest extends AbstractHandlerTest
+class CommentHandlerTest extends AbstractHandlerTestCase
 {
     /** @dataProvider getHandleValueTestData */
     public function testHandleValue($value, Token $unusedArgument, $remainingContent)
@@ -30,7 +30,7 @@ public function testHandleValue($value, Token $unusedArgument, $remainingContent
         $this->assertRemainingContent($reader, $remainingContent);
     }
 
-    public function getHandleValueTestData()
+    public static function getHandleValueTestData()
     {
         return [
             // 2nd argument only exists for inherited method compatibility
@@ -39,7 +39,7 @@ public function getHandleValueTestData()
         ];
     }
 
-    public function getDontHandleValueTestData()
+    public static function getDontHandleValueTestData()
     {
         return [
             ['>'],
diff --git a/Tests/Parser/Handler/HashHandlerTest.php b/Tests/Parser/Handler/HashHandlerTest.php
index 9444f51..c2ad031 100644
--- a/Tests/Parser/Handler/HashHandlerTest.php
+++ b/Tests/Parser/Handler/HashHandlerTest.php
@@ -16,9 +16,9 @@
 use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerEscaping;
 use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerPatterns;
 
-class HashHandlerTest extends AbstractHandlerTest
+class HashHandlerTest extends AbstractHandlerTestCase
 {
-    public function getHandleValueTestData()
+    public static function getHandleValueTestData()
     {
         return [
             ['#id', new Token(Token::TYPE_HASH, 'id', 0), ''],
@@ -29,7 +29,7 @@ public function getHandleValueTestData()
         ];
     }
 
-    public function getDontHandleValueTestData()
+    public static function getDontHandleValueTestData()
     {
         return [
             ['id'],
diff --git a/Tests/Parser/Handler/IdentifierHandlerTest.php b/Tests/Parser/Handler/IdentifierHandlerTest.php
index c54ba53..a39abb6 100644
--- a/Tests/Parser/Handler/IdentifierHandlerTest.php
+++ b/Tests/Parser/Handler/IdentifierHandlerTest.php
@@ -16,9 +16,9 @@
 use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerEscaping;
 use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerPatterns;
 
-class IdentifierHandlerTest extends AbstractHandlerTest
+class IdentifierHandlerTest extends AbstractHandlerTestCase
 {
-    public function getHandleValueTestData()
+    public static function getHandleValueTestData()
     {
         return [
             ['foo', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), ''],
@@ -29,7 +29,7 @@ public function getHandleValueTestData()
         ];
     }
 
-    public function getDontHandleValueTestData()
+    public static function getDontHandleValueTestData()
     {
         return [
             ['>'],
diff --git a/Tests/Parser/Handler/NumberHandlerTest.php b/Tests/Parser/Handler/NumberHandlerTest.php
index b43d369..7087a6b 100644
--- a/Tests/Parser/Handler/NumberHandlerTest.php
+++ b/Tests/Parser/Handler/NumberHandlerTest.php
@@ -15,9 +15,9 @@
 use Symfony\Component\CssSelector\Parser\Token;
 use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerPatterns;
 
-class NumberHandlerTest extends AbstractHandlerTest
+class NumberHandlerTest extends AbstractHandlerTestCase
 {
-    public function getHandleValueTestData()
+    public static function getHandleValueTestData()
     {
         return [
             ['12', new Token(Token::TYPE_NUMBER, '12', 0), ''],
@@ -30,7 +30,7 @@ public function getHandleValueTestData()
         ];
     }
 
-    public function getDontHandleValueTestData()
+    public static function getDontHandleValueTestData()
     {
         return [
             ['hello'],
diff --git a/Tests/Parser/Handler/StringHandlerTest.php b/Tests/Parser/Handler/StringHandlerTest.php
index baa7273..9a984ed 100644
--- a/Tests/Parser/Handler/StringHandlerTest.php
+++ b/Tests/Parser/Handler/StringHandlerTest.php
@@ -16,9 +16,9 @@
 use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerEscaping;
 use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerPatterns;
 
-class StringHandlerTest extends AbstractHandlerTest
+class StringHandlerTest extends AbstractHandlerTestCase
 {
-    public function getHandleValueTestData()
+    public static function getHandleValueTestData()
     {
         return [
             ['"hello"', new Token(Token::TYPE_STRING, 'hello', 1), ''],
@@ -31,7 +31,7 @@ public function getHandleValueTestData()
         ];
     }
 
-    public function getDontHandleValueTestData()
+    public static function getDontHandleValueTestData()
     {
         return [
             ['hello'],
diff --git a/Tests/Parser/Handler/WhitespaceHandlerTest.php b/Tests/Parser/Handler/WhitespaceHandlerTest.php
index 67509ef..81dd761 100644
--- a/Tests/Parser/Handler/WhitespaceHandlerTest.php
+++ b/Tests/Parser/Handler/WhitespaceHandlerTest.php
@@ -14,9 +14,9 @@
 use Symfony\Component\CssSelector\Parser\Handler\WhitespaceHandler;
 use Symfony\Component\CssSelector\Parser\Token;
 
-class WhitespaceHandlerTest extends AbstractHandlerTest
+class WhitespaceHandlerTest extends AbstractHandlerTestCase
 {
-    public function getHandleValueTestData()
+    public static function getHandleValueTestData()
     {
         return [
             [' ', new Token(Token::TYPE_WHITESPACE, ' ', 0), ''],
@@ -28,7 +28,7 @@ public function getHandleValueTestData()
         ];
     }
 
-    public function getDontHandleValueTestData()
+    public static function getDontHandleValueTestData()
     {
         return [
             ['>'],
diff --git a/Tests/Parser/ParserTest.php b/Tests/Parser/ParserTest.php
index 77ce5d5..e36731b 100644
--- a/Tests/Parser/ParserTest.php
+++ b/Tests/Parser/ParserTest.php
@@ -93,7 +93,7 @@ public function testParseSeriesException($series)
         Parser::parseSeries($function->getArguments());
     }
 
-    public function getParserTestData()
+    public static function getParserTestData()
     {
         return [
             ['*', ['Element[*]']],
@@ -151,7 +151,7 @@ public function getParserTestData()
         ];
     }
 
-    public function getParserExceptionTestData()
+    public static function getParserExceptionTestData()
     {
         return [
             ['attributes(href)/html/body/a', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '(', 10))->getMessage()],
@@ -181,7 +181,7 @@ public function getParserExceptionTestData()
         ];
     }
 
-    public function getPseudoElementsTestData()
+    public static function getPseudoElementsTestData()
     {
         return [
             ['foo', 'Element[foo]', ''],
@@ -203,7 +203,7 @@ public function getPseudoElementsTestData()
         ];
     }
 
-    public function getSpecificityTestData()
+    public static function getSpecificityTestData()
     {
         return [
             ['*', 0],
@@ -231,7 +231,7 @@ public function getSpecificityTestData()
         ];
     }
 
-    public function getParseSeriesTestData()
+    public static function getParseSeriesTestData()
     {
         return [
             ['1n+3', 1, 3],
@@ -253,7 +253,7 @@ public function getParseSeriesTestData()
         ];
     }
 
-    public function getParseSeriesExceptionTestData()
+    public static function getParseSeriesExceptionTestData()
     {
         return [
             ['foo'],
diff --git a/Tests/Parser/Shortcut/ClassParserTest.php b/Tests/Parser/Shortcut/ClassParserTest.php
index 29d9d5f..ded92ea 100644
--- a/Tests/Parser/Shortcut/ClassParserTest.php
+++ b/Tests/Parser/Shortcut/ClassParserTest.php
@@ -32,7 +32,7 @@ public function testParse($source, $representation)
         $this->assertEquals($representation, (string) $selector->getTree());
     }
 
-    public function getParseTestData()
+    public static function getParseTestData()
     {
         return [
             ['.testclass', 'Class[Element[*].testclass]'],
diff --git a/Tests/Parser/Shortcut/ElementParserTest.php b/Tests/Parser/Shortcut/ElementParserTest.php
index 79cc227..4c10029 100644
--- a/Tests/Parser/Shortcut/ElementParserTest.php
+++ b/Tests/Parser/Shortcut/ElementParserTest.php
@@ -32,7 +32,7 @@ public function testParse($source, $representation)
         $this->assertEquals($representation, (string) $selector->getTree());
     }
 
-    public function getParseTestData()
+    public static function getParseTestData()
     {
         return [
             ['*', 'Element[*]'],
diff --git a/Tests/Parser/Shortcut/HashParserTest.php b/Tests/Parser/Shortcut/HashParserTest.php
index a7c79d6..c8bfdef 100644
--- a/Tests/Parser/Shortcut/HashParserTest.php
+++ b/Tests/Parser/Shortcut/HashParserTest.php
@@ -32,7 +32,7 @@ public function testParse($source, $representation)
         $this->assertEquals($representation, (string) $selector->getTree());
     }
 
-    public function getParseTestData()
+    public static function getParseTestData()
     {
         return [
             ['#testid', 'Hash[Element[*]#testid]'],
diff --git a/Tests/XPath/TranslatorTest.php b/Tests/XPath/TranslatorTest.php
index 0a1ba4d..d330600 100644
--- a/Tests/XPath/TranslatorTest.php
+++ b/Tests/XPath/TranslatorTest.php
@@ -165,7 +165,7 @@ public function testOnlyOfTypeFindsSingleChildrenOfGivenType()
         $this->assertSame('A', $nodeList->item(0)->textContent);
     }
 
-    public function getXpathLiteralTestData()
+    public static function getXpathLiteralTestData()
     {
         return [
             ['foo', "'foo'"],
@@ -175,7 +175,7 @@ public function getXpathLiteralTestData()
         ];
     }
 
-    public function getCssToXPathTestData()
+    public static function getCssToXPathTestData()
     {
         return [
             ['*', '*'],
@@ -222,7 +222,7 @@ public function getCssToXPathTestData()
         ];
     }
 
-    public function getXmlLangTestData()
+    public static function getXmlLangTestData()
     {
         return [
             [':lang("EN")', ['first', 'second', 'third', 'fourth']],
@@ -237,7 +237,7 @@ public function getXmlLangTestData()
         ];
     }
 
-    public function getHtmlIdsTestData()
+    public static function getHtmlIdsTestData()
     {
         return [
             ['div', ['outer-div', 'li-div', 'foobar-div']],
@@ -362,7 +362,7 @@ public function getHtmlIdsTestData()
         ];
     }
 
-    public function getHtmlShakespearTestData()
+    public static function getHtmlShakespearTestData()
     {
         return [
             ['*', 246],