diff --git a/exercises/practice/circular-buffer/CircularBufferTest.php b/exercises/practice/circular-buffer/CircularBufferTest.php
index e543d60b1..f90b23ab2 100644
--- a/exercises/practice/circular-buffer/CircularBufferTest.php
+++ b/exercises/practice/circular-buffer/CircularBufferTest.php
@@ -3,13 +3,15 @@
 declare(strict_types=1);
 
 use PHPUnit\Framework\Attributes\TestDox;
-
-require_once 'CircularBuffer.php';
-
 use PHPUnit\Framework\TestCase;
 
 class CircularBufferTest extends TestCase
 {
+    public static function setUpBeforeClass(): void
+    {
+        require_once 'CircularBuffer.php';
+    }
+
     /**
      * uuid: 28268ed4-4ff3-45f3-820e-895b44d53dfa
      */