--- ../test/Http1/Rfc7230Test.php	2026-07-11 10:44:40.301418984 +0300
+++ ../test/Http1/Rfc7230Test.php	2026-07-11 10:46:20.319912416 +0300
@@ -4,18 +4,19 @@
 
 use Amp\Http\InvalidHeaderException;
 use PHPUnit\Framework\TestCase;
+use PHPUnit\Framework\Attributes\DataProvider;
 use function Amp\Http\mapHeaderPairs;
 
 class Rfc7230Test extends TestCase
 {
-    /** @dataProvider provideValidHeaders */
+    #[DataProvider('provideValidHeaders')]
     public function testValidHeaderPairParsing(string $rawHeaders, array $expectedResult): void
     {
         $result = Rfc7230::parseHeaderPairs($rawHeaders);
         $this->assertSame($result, $expectedResult);
     }
 
-    /** @dataProvider provideValidHeaders */
+    #[DataProvider('provideValidHeaders')]
     public function testValidHeaderParsing(string $rawHeaders, array $expectedResult): void
     {
         $result = Rfc7230::parseHeaders($rawHeaders);
@@ -23,14 +24,14 @@
         $this->assertSame($result, $headers);
     }
 
-    /** @dataProvider provideValidHeaders */
+    #[DataProvider('provideValidHeaders')]
     public function testValidHeaderPairFormatting(string $rawHeaders /* ignored for this case */, array $expectedResult): void
     {
         $result = Rfc7230::parseHeaderPairs(Rfc7230::formatHeaderPairs($expectedResult));
         $this->assertSame($result, $expectedResult);
     }
 
-    /** @dataProvider provideValidHeaders */
+    #[DataProvider('provideValidHeaders')]
     public function testValidHeaderFormattingDifferentCasing(string $rawHeaders /* ignored for this case */, array $expectedResult): void
     {
         $headers = [];
@@ -44,7 +45,7 @@
         $this->assertSame($result, $expectedResult);
     }
 
-    public function provideValidHeaders(): array
+    public static function provideValidHeaders(): array
     {
         return [
             ["x:y\r\n", [["x", "y"]]],
@@ -57,14 +58,14 @@
         ];
     }
 
-    /** @dataProvider provideInvalidHeaders */
+    #[DataProvider('provideInvalidHeaders')]
     public function testInvalidHeaderParsing(string $rawHeaders): void
     {
         $this->expectException(InvalidHeaderException::class);
         Rfc7230::parseHeaders($rawHeaders);
     }
 
-    public function provideInvalidHeaders(): array
+    public static function provideInvalidHeaders(): array
     {
         return [
             [" x:y\r\n"],