diff --git a/tests/Unit/Core/DevkitConfigTest.php b/tests/Unit/Core/DevkitConfigTest.php
index 23ea761..b769fea 100644
--- a/tests/Unit/Core/DevkitConfigTest.php
+++ b/tests/Unit/Core/DevkitConfigTest.php
@@ -18,7 +18,7 @@ final class DevkitConfigTest extends TestCase
     protected function setUp(): void
     {
         $this->tmpDir = sys_get_temp_dir() . '/devkit_config_test_' . uniqid();
-        mkdir($this->tmpDir, 0777, true);
+        mkdir($this->tmpDir, 0o777, true);
     }
 
     protected function tearDown(): void
diff --git a/tests/Unit/ValueObject/MigrationReportTest.php b/tests/Unit/ValueObject/MigrationReportTest.php
index 5d6f541..a888ccb 100644
--- a/tests/Unit/ValueObject/MigrationReportTest.php
+++ b/tests/Unit/ValueObject/MigrationReportTest.php
@@ -66,7 +66,7 @@ public function totalItemsCountsAllCategories(): void
     public function removeFilesDeletesExistingFiles(): void
     {
         $tmpDir = sys_get_temp_dir() . '/devkit_test_' . uniqid();
-        mkdir($tmpDir, 0777, true);
+        mkdir($tmpDir, 0o777, true);
 
         $fileToRemove = $tmpDir . '/phpstan.neon';
         file_put_contents($fileToRemove, 'parameters:');