diff --git a/tests/tests/Report/PhpTest.php b/tests/tests/Report/PhpTest.php
index 733e739f4..75c11b4ba 100644
--- a/tests/tests/Report/PhpTest.php
+++ b/tests/tests/Report/PhpTest.php
@@ -53,6 +53,7 @@ public function testCacheDataNeverGetSaved(): void
         $coverage->getReport();
 
         $refProperty = new ReflectionProperty($coverage, 'cachedReport');
+        $refProperty->setAccessible(true);
 
         $this->assertNotNull($refProperty->getValue($coverage));