diff --git a/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php b/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php
index c0155a9..e6fe7e0 100644
--- a/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php
+++ b/core/modules/migrate/tests/src/Kernel/process/CopyFileTest.php
@@ -37,7 +37,7 @@ protected function setUp() {
   }
 
   protected function tearDown() {
-    unlink('public://file1.jpg');
+    $this->fileSystem->unlink('public://file1.jpg');
 
     parent::tearDown();
   }