diff --git a/composer.json b/composer.json
index cdea406..d4baaed 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,6 @@
         "bin/mdphpcs"
     ],
     "require-dev": {
-        "phpunit/phpunit": "^11.3"
+        "phpunit/phpunit": "^9.6"
     }
 }
diff --git a/tests/SnifferTest.php b/tests/SnifferTest.php
index bd29969..f79373c 100644
--- a/tests/SnifferTest.php
+++ b/tests/SnifferTest.php
@@ -7,14 +7,14 @@
 use PHPUnit\Framework\TestCase;
 use ReflectionMethod;
 use SilverStripe\MarkdownPhpCodeSniffer\Sniffer;
-use PHPUnit\Framework\Attributes\DataProvider;
 
 class SnifferTest extends TestCase
 {
     /**
      * Validates that fenced code blocks are correctly identified and have the expected data
+     *
+     * @dataProvider provideFindFencedBlocks
      */
-    #[DataProvider('provideFindFencedBlocks')]
     public function testFindFencedCodeBlocks(
         string $path,
         bool $exists,
@@ -48,7 +48,7 @@ public function testFindFencedCodeBlocks(
         }
     }
 
-    public static function provideFindFencedBlocks()
+    public function provideFindFencedBlocks()
     {
         return [
             'nothing to lint 1' => [