diff --git a/composer.json b/composer.json
index fd48ca0..91f7b80 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
         "silverstripe/framework": "^6"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.6",
+        "phpunit/phpunit": "^11.3",
         "squizlabs/php_codesniffer": "^3.7",
         "silverstripe/versioned": "^3",
         "silverstripe/standards": "^1",
diff --git a/tests/GridFieldOrderableRowsTest.php b/tests/GridFieldOrderableRowsTest.php
index 6cf438b..7ef3f1e 100644
--- a/tests/GridFieldOrderableRowsTest.php
+++ b/tests/GridFieldOrderableRowsTest.php
@@ -61,7 +61,7 @@ class GridFieldOrderableRowsTest extends SapphireTest
         ThroughBelongsVersioned::class,
     ];
 
-    public function reorderItemsProvider()
+    public static function reorderItemsProvider()
     {
         return [
             [StubParent::class . '.parent', 'MyHasMany', 'Sort'],
@@ -336,7 +336,7 @@ public function testGetManipulatedData(string $dataClass, string $listClass, arr
         $this->assertSame($expected, $sortedList->column($col));
     }
 
-    public function provideGetManipulatedData(): array
+    public static function provideGetManipulatedData(): array
     {
         return [
             [